Project of Green Building

8/4/2019 Project of Green Building

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GREEN BUILDING CONCEPT AND MATERIALS

Submitted by

A.SHRIKANT RAMAKANT ROLL NO. 63001

B.MAYANK ROLL NO. 63037

P.MITHUN ROLL NO. 63040

A Thesis submitted in partial fulfillment of academic requirements for the

award of Quantity surveying (PGP- QS) .

PGP QS VI BATCH 2009-2010

NATIONAL INSTITUTE OF CONSTRUCTION MANAGEMENT AND

RESEARCH, HYDERABAD.


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CERTIFICATE

This is to certify that this research thesis titled GREEEN BUILDING

CONCEPT AND MATERIALS isthe bonafide work of:

Mr. AWADKE SHRIKANT.R Roll No. 63001

Mr. MAYANK BANSAL Roll No.63037

Mr. MITHUN U. PRABHA Roll No. 63040

In the partial fulfillment of academic requirement for the award of diploma in

Post Graduate Programme in Quantity surveying (PGP- QS). This work is

carried out under my guidance and supervision.

Date:

Place: Hyderabad

Signature of guide

Dr.V.SRI HARI

ASSISTANT PROFESSOR

NICMARs-CISC

Prof. K.R.Ramana,

Dean-in-charge

NICMARs-CISC.


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DECLARATION

We declare that the thesis titled Green Building Concept And Materials is the

bonafide work carried out by us under the guidance of Dr.V.Sri Hari Further,

we declare that this has not formed the basis of award of any degree, diploma,

association or other similar degree or diploma and has not been submitted

anywhere else.

Signature: Name: Awadke Shrikant.R

Signature: Name: Mayank Bansal

Signature: Name: Mithun U.Prabha

Date:

Place: Hyderabad


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ACKNOWLEDGEMENT

We first thank our parents who gave us the moral support right from the

moment we thought about this project and who have provided us with

opportunity to serve the society as Quantity Surveying, even though one can

never repay the debts to his parents.

We express our sincere thanks to Prof.K.R.RAMANA, Dean of

NICMAR for his constant encouragement during the course. Moreover we

thank for his timely suggestion and beneficial discussion and helping us to

overcome all hurdles while carrying out our project.

Our warm thanks to our guide Dr.V.SRI HARI, Assistant Professor for

giving the most valuable input for this successful work - the freedom to think.

His leniency is worth mentioning which helped us to succeed.

We express our sincere thanks to DR.B.RAVINDER, Our coordinator for

his valuable guidance during the course of our project. It would be a big sin if I

exempt Prof.R.SATISH KUMAR,Assistant Professor who is prime reason for

me to get admitted in this institute.

Our job would remain incomplete if we do not thank all our friends, and

the college staffs, teaching and non-teaching, the eagerness, support and their

good will that had helped us to perform to the best of our ability.


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ABSTRACT

Its hard to pick up a newspaper or magazine or turn on your TV without

hearing about some associated topics such as global warming, dwindling watersupplies, the ozone layer, the oil crisis, ethanol, or renewable energy resources.

Concern for the environment and the desire to be more eco-friendly is no longer

a nice-to-do, but a must-do for people. The days of being EITHER profitable

OR sustainable are gone. Call that Green business 1.0. We're now coming

around to the fact that adoption of sustainable practices actually increases

profitability when implanted with a solid plan, and most importantly, actually

allows companies to make a positive impact on our society and planet. From

planting trees, to using solar energy, to constructing smart buildings and even

collecting litter, India is going all green. These days, greener pastures are

looking more like battlefields for companies to people, all trying to position

themselves as environmentally friendly.


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TABLE OF CONTENTS

Chapters Contents Page no.

1 Objective 8

2 Introduction 9

3 What is Green Building 11

4 Perceptions and Realities 12

5 Green Building Rating System 14

6 LEED Certification Levels 15

7 History ofGreen Buildings in India 17

8 Green Buildings in India 18

9 Materials 19

A. Steps product Selection

B. FLY Ash

C. FLY Ash Brick

D. Autoclaved Aerated Concrete Block

E. Paints,Finishes &Adhesive

F. High Performance Glas

10 Climatic Analysis 29


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11 Green Building Provisions 31

A. Water Harvesting System

B. Roof water harvesting system

C. Maximum Daylight factor

D. Sun dial & sun path

E. Roof ventilation

F. Tube Cooling

G. Properties of greenery to be provided

12 Energy efficiency 43

13 Why Green building? 46

14 Conclusion 51

15 References 52


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OBJECTIVE

The objective of study of this green building concept is:

To know about the green building. To study about the perceptions and realities of green building concept. To study about the various materials used in green building concept.

(1)Autoclaved aerated concrete blocks(AAC).

(2) High performance glass.

(3) Galvalume sheets.

To study about various green building provision.(1) Water Harvesting System(2) Maximum daylight factor(3) Sun dial & Sun path(4) Roof ventilation(5) TUBE COOLING


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Introduction

Its hard to pick up a newspaper or magazine or turn on your TV without hearing about some

associated topics such as global warming, dwindling water supplies, the ozone layer, the oil

crisis, ethanol, or renewable energy resources. Concern for the environment and the desire to

be more eco-friendly is no longer a nice-to-do, but a must-do for people. The days of being

EITHER profitable OR sustainable are gone. Call that Green business 1.0. We're now coming

around to the fact that adoption of sustainable practices actually increases profitability when

implanted with a solid plan, and most importantly, actually allows companies to make a

positive impact on our society and planet. From planting trees, to using solar energy, to

constructing smart buildings and even collecting litter, India is going all green. These days,

greener pastures are looking more like battlefields for companies to people, all trying to

position themselves as environmentally friendly. Is it a change in corporate and consumer

attitude, or just marketing spin? Are caring and green just the latest must have, brand

value buzzwords? The existing literature on greenism is endless in international context, but

there has not much literature available in Indian context. Globally there are a number of

massive changes occurring because of environmental concern. These changes are being

heavily influenced by a variety of environmental, economic, and social factors such as

climate changes, new stricter trade regulations, and a growing awareness by consumers about

how their purchasing habits can affect not only their health, but the health of the world

around them. These issues will increasingly impact not only the quality of life in India, but

also the ability for the country to remain competitive in an ever-globalizing world.

With recent exponential increases in energy pricing, the formerly neglected or

underestimated concept of energy conservation has swiftly assumed great significance and

potential in cutting costs and promoting economic development, especially in a developing-

country scenario. Reckless and unrestrained urbanization, with its haphazard buildings, has

bulldozed over the valuable natural resources of energy, water, and ground cover, thereby

greatly hampering the critical process of eco-friendly habitat development. However, it is not

too late to retrace the steps. The resource crunch confronting the energy supply sector can

still be alleviated by designing and developing future buildings on the sound concepts of

energy efficiency and sustainability. Buildings are part of basic needs. It is for protecting usfrom Nature's extremes: cold, heat, wind and rain. But these structures make as well as affect


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our environment too. Constructing and operating buildings requires enormous amounts of

energy, water, and materials and creates large amounts of waste. Where and how they are

built affects the ecosystems around us in countless ways. And the buildings themselves create

new indoor environments that present new environmental problems and challenges. The

building sector is growing at very rapid pace and it is the third largest consumer of energy,

after industry and agriculture. Environmentally benign technologies and practices can address

sustainability issues and contribute to conservation of national resources, besides saving on

operating cost. World over, today, the focus is on constructing Green Buildings, which

addresses environmentally sustainable issues in good manner.


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WHAT IS A GREEN BUILDING

Green building does not mean building is painted green but building which has incorporatednature friendly features. Green represents nature.

Green building is the practice of increasing the efficiency with which buildings use resources

energy, water, and materialswhile reducing building impacts on human health and the

environment during the building's lifecycle, through better siting, design, construction,

operation, maintenance, and removal.

Green buildings are designed to reduce the overall impact of the built environment on human

health and the natural environment by:

Efficiently using energy, water, and other resources Protecting occupant health and improving employee productivity Reducing waste, pollution and environmental degradation

Effective green building can lead to

1) Reduced operating costs by increasing productivity and using less energy and water,

2) Improved public and occupant health due to improved indoor air quality, and

Reduced environmental impacts by, for example, lessening storm water runoff

And the heat island effect, etc.

In short, A Green building should create delight when entered, serenity and health when

occupied and regret when departed

Energy efficient and environment conscious building design is essentially an integrated

approach. The available options in architectural intervention, building materials and design

methodologies need to be carefully evaluated to minimize energy usage, minimize the

ecological degradation that may be caused by the construction of the building and provide

cost effective solutions. The aim is to achieve the desired comfort with the least input of

conventional energy. Though the rules are not very well defined, architects and designers

accomplish the task through solar passive design, use of renewable energy technology

systems, and/or natural building materials. While designing such buildings, not only new


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building stock can be targeted but also existing buildings can be retrofitted with energy

efficient and eco-friendly technologies, thereby substantially reducing energy consumption.

Perceptions and Realities

Perception #1: Green buildings are costlier

Reality: Considerable research and analysis has been carried out with regard to the cost

impacts of a green building. The cost could be slightly higher than a conventional building.

But then, this needs to be seen with a different paradigm.

The question is how do we compare the costs? There needs to be a baseline

cost for all comparisons to be alike. The incremental cost is always relative and depends on

the extent of eco-friendly features already considered during design. The incremental cost

would appear small if the baseline design is already at a certain level of good eco-design; It

would appear huge if the base design has not considered green principles.

The second and rather a critical paradigm is to look at the incremental cost in

relation to the life cycle cost. This kind of an approach could be revealing. Who knows,

buildings would last for a 50 years or 60 years or 100 years!. Over its life cycle, the operating

cost would work out to 80-85 % while the incremental cost which is a onetime cost is only 8-

10 %.

There is a decreasing trend in the incremental cost over the years. This trend

would continue and we all look forward to the day when the cost of a green building is lower

than a conventional building and it can be easily viewed by the Energy performance of three

LEED Platinum rated buildings have been monitored for about 3 years and energy savings

achieved are shown in Table:

Building Built-up

Area

(Sq.ft)

Consumption

of

Conventional

Building

(kWh)

Consumption

of

LEED

Designed

Building

(kWh)

%

Reduction

Annual

Energy

saving in

Rs Lakhs

Wipro

Technologies,

1,75,000 48,00,000 31,00,000 40% 102


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Gurgaon

ITC Green

Centre,

Gurgaon

1,70,000 35,00,000 20,00,000 45% 90

CII Godrej

GBC,

Hyderabad

20,000 3,50,000 1,30,000 63% 9

Perception # 2: Green buildings have to be air-conditioned

Reality: Green building concepts and the LEED rating can be applied for non-air

conditioning buildings. It has been applied on three such buildings in India viz. IGP office,

Gulbarga, the Royal Engineering College, Hyderabad and LIC office, Shimoga.

While performing the energy analysis using software tools, such buildings will

input the same cooling system both in the baseline and the proposed design. This ensures that

the building is recognized for any of the other energy efficiency measures incorporated, for

example - envelop, lighting, roof insulation etc.

This kind of an approach also ensures that an apple-to-apple comparison is made while

evaluating two green buildings, whether conditioned or not.

Perception # 3: Green buildings take more time

Reality: There is a general perception that going the green way may affect the project

schedules. This was perhaps the case for the CII-Godrej GBC building when it was the first

time that a green building rating tool was being applied in the country. The design in this case

took about one-and-half years while the construction was completed in about 9 months!

Thanks to the Green building movement; now there is so much of capacity

building that has happened in the country. Now, there is absolutely no difference in the time

involved in constructing a green building vis--vis a normal building. The time schedule for

the rating can be synchronized with that of the building. This has been amply demonstrated in

buildings like the Wipro in Gurgaon and Grundfos in Chennai.


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Green Building Rating System

There have been buildings which adopt one or more green features. To recognize the extentof green features that a building adopts, Rating Systems have been evolved and come of age

in the US and Europe. These rating Systems are playing a pivoted role in market

transformation of the green buildings. Eco or green design principles are universal; it cannot

be one for USA, one for India and one for Japan. Most of the green building rating systems

touch on the same chord conservation of resources. But the LEED (Leadership in Energy

and Environmental Design) rating system has turned out to be the most versatile and robust.

After considering various rating systems, the Indian Green Building Council (IGBC) decided

to adopt the LEED rating system.

The LEED green building rating system developed by the US Green Building

Council is now recognized as an international rating system and followed by more than 24

countries. The potential for energy savings is 40 50% in buildings, if energy efficiency

measures are incorporated at the design stage. For existing buildings, the potential can be as

high as 20-25% which can be achieved by implementing house keeping and retrofitting

measures.

In India the rating system is organized into five environmental categories:

Sustainable Sites (max 13 points) Water Efficiency (max 6 points) Energy & Atmosphere (max 17 points) Materials & Resources (max 13 points) Indoor Environmental Quality (max 15points)

An additional category, Innovation & Design process (max 5 points)


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LEED Certification Levels

Different certification levels are based on the amount of points a building receives for

successful attempts at the six categories. The certification levels range from simply

"Certified" to "Platinum," which is the highest level of LEED certification and the most

environmental and health friendly.

In addition, LEED has a number of different types of certifications including:

LEED for New Construction: New construction and major renovations (the mostcommonly applied-for LEED certification)

LEED for Existing Buildings: Existing buildings seeking LEED certification LEED for Commercial Interiors: Commercial interior fit outs by tenants LEED for Core and Shell: Core-and-shell projects (total building minus tenant fit

outs) LEED for Homes: Homes LEED for Neighborhood Development: Neighborhood development LEED for Schools: Recognizes the unique nature of the design and construction of K-

12 schools

LEED for Retail: Consists of two rating systems. One is based on New Constructionand Major Renovations

Certification Level Points

Certified 26 to 32

Silver 33 to 38

Gold 39 to 51

Platinum 52 or more


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What does LEED cost?

The cost to achieve LEED certification can depend upon a variety of factors and

assumptions, including:

Type and size of project; Timing of introduction of LEED as a design goal or requirement; Level of LEED certification desired; Composition and structure of the design and construction teams; Experience and knowledge of designers and contractors or willingness to learn; Process used to select LEED credits; Clarity of the project implementation documents; Base case budgeting assumptions.


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History of Green Buildings in India

The concept of green buildings is not as nascent as we think it is. The

Evolution of housing started by utilizing nature and natural resources like trees and caves as

shelter from the severity of natural elements like sun, rain, wind, etc. Based on such complex

experiences, our Vedic philosophy evolved certain methods to maximize the use of Panch

Mahabhuta or the 5 basic elements of nature, i.e., Jal (water), Agni (fire), Prithvi (earth),

Vayu (wind), and Avkash (space). Our ancient builders tried to harmonies these five elements

in building planning and construction so that maximum advantage of these elements can be

taken and ill effects can be avoided. They called this science as Vastushastra.

The basic principal of Vastushastra is to get maximum advantage out of naturewithout harming nature. Leaving open spaces in a centre of a building was done to provide

light and cross ventilation to adjoining rooms. Water storage and prayer rooms were

positioned in the northeast direction to facilitate solar rays to disinfect water and rooms. The

south west portion of the house was made heavy to protect it against heavy winds and heavy

rains. The south east portion of the house receives comparatively less solar rays and hence the

kitchen is placed here so that the general temperature of the kitchen is not raised. This was

the kind of wisdom prevailing at that time. In simple terms, these were the bye-laws for the

planning and construction of any building. Our ancient builders desired that everyone should

follow these rules religiously. Hence, for better implementation of these rules, they coupled it

with fear psychology. They associated each building norm with aspects of personal life and

specified that lack of adherence to these norms would results in loss of health, wealth or even

reputation due to the disapproval of nature gods. This was done to instigate fear so that

building rules are adopted properly. What a way to implement and enforce the laws, without

any police, inspector or supervisors!


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Green Buildings in India

The Green Building movement has gained tremendous momentum during the

past 6 years, ever since the CII- Godrej GBC embarked on achieving the prestigious LEED

rating for centre at Hyderabad. The Platinum Rating for the Green Business Centre building

has sensitized the stakeholders of the construction industry. Today, several corporate and

Government organizations are considering Green Buildings in a major way.

From a humble beginning of 20,000 sq.ft of green footprint in the country in

the year 2003, to a staggering 10 million sq.ft expected by end 2008,green buildings are well

poised to reach scalar heights. Today a variety of green building projects are coming up in the

country residential complexes, exhibition centers, hospitals, educational institutions,

laboratories, IT parks, airports, government buildings and corporate offices.


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MATERIALS

Introduction:

General changes in the outside ambient temperature affect the comfort level of

inhabitants in the building. The concept of green building incorporates and integrates a

variety of strategies during the design, construction and operation of building projects. The

use of green building materials and products represents one important strategy in the design

of a building. Green building materials offer specific benefits to the building owner and

building occupants, which can be:

Reduced maintenance/replacement costs over the life of the building.

Energy conservation. Improved occupant health and productivity. Lower costs associated with changing space configurations. Greater design flexibility.

Green materials are environmentally responsible because the impacts are

considered over the life of the product. Therefore it is very important to select these green

materials with good selection criteria. These environmental criteria may vary as per the

project. It may also vary depending upon whether the project is a new construction or

renovation of an existing building.

Three basic steps of product selection

Product selection can begin after the establishment of project-specific

environmental goals. The environmental assessment process for building products involves

three basic steps:

1. ResearchThis step involves gathering all technical information to be evaluated,

including manufacturers' information such as Material Safety Data Sheets (MSDS), Indoor

Air Quality (IAQ) test data, product warranties, source material characteristics, recycledcontent data, environmental statements, and durability information. In addition, this step may


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involve researching other environmental issues, building codes, government regulations,

building industry articles, model green building product specifications, and other sources of

product data. Research helps identify the full range of the projects building material options.

2. EvaluationThis step involves confirmation of the technical information, as well as filling

in information gaps. For example, the evaluator may request product certifications from

manufacturers to help and sort out possible exaggerated environmental product claims.

Evaluation and assessment is relatively simple when comparing similar types of building

materials using the environmental criteria. For example, a recycled content assessment

between various manufacturers of medium density fiberboard is a relatively straightforward

"apples to apples" comparison. However, the evaluation process is more complex when

comparing different products with the same function. Then it may become necessary to

process both descriptive and quantitative forms of data.

3. SelectionThis step often involves the use of an evaluation matrix for scoring the

project-specific environmental criteria. The total score of each product evaluation will

indicate the product with the highest environmental attributes. Individual criteria included in

the rating system can be weighted to accommodate project-specific goals and objectives.

1.FLY ASH The pozzolanic Property of Fly Ash makes it a good resource for the

construction industry.

As pozzolanic material, Fly Ash is used to manufacture Portland PozzolanaCement, Ready Mixed Concrete, various building products including Bricks /

blocks etc.

As an inert material, it is used for development of low lying areas, constructionof Road Embankments.

Its use in farmers fields also improves the crop production by 15 to 25%

FLY ASH BRICKS


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ADVANTAGES

The unburn carbon present in the pond ash helps in reducing coal consumptionup to 5 tonnes per lakh bricks.

Addition of Ash to the plastic red and black soils reduces drying losses in theshaped bricks.

Higher strength bricks can be made from red and black soils. Up to 40% additional bricks can be produced with same quantity of top soil. Provides better thermal insulation to walls and also reduces dead load on

structures.

2. AUTOCLAVED AERATED CONCRETE BLOCKS (AAC)

AAC is one of the lightest forms of Concrete and is the most technically advanced

material used for the manufacture of mass produced concrete blocks Unique

properties provided in one product:

Acoustic Energy Conservation Fire Resistance Structural Properties

WHY USE AUTOCLAVED AERATED CONCRETE BLOCKS?

Large quantities of fly ash from coal based power plants canbe utilized for construction purposes instead of using mining

materials for construction.

As Nanded is situated near to Parali where Thermal Power station is located


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The fly ash is cheaply available for the manufacturing process.

Optimum use of resources thereby causing minimumDamage to natural and social environment.

Reduction in consumption of heavier quarried material Minimizes wastage and contributes significantly to the health

And safety of construction workers by providing easily handled

Light weight units

Sizes:

Blocks--Face size 600 x 200

Slabs--Face Size 600 x 600

Thickness ranging from

75mm

100mm

125mm

150mm

200mm

230mm

It is a factory made product can be made available in the desired thickness as per

requirement.

Strengths of AAC

AAC products exceed the compressive strength requirements of building codesand conventional bricks

Compressive Strength for product is more than 3 N/mm2 For special applications compressive strength can be made available from 4.0,

7.0 and 8.4 N/mm2

Bending Strength lies in the range of 15% to 20% of the


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compressive strength

Modulus of elasticity is 1.5 - 3.2 X 103 N/mm2

ADVANTAGES:

a. LIGHT WEIGHT

Reduces dead load on structures Saves in foundations and structural members Ideal for seismic & low soil bearing capacity zones Construction of additional floors Easy handling Faster construction Quicker construction gives higher worker productivity Possible 25% saving in beam costs

b. HIGH THERMAL INSULATION

Interiors - Cooler in summer & warmer in winter Reduces air conditioning costs Energy conservation Reduces quantum heat of flow Delays transmission of heat Enhances comfort level by maintaining nearly constant temperature Reduces energy costs

c. SOUND INSULATION

Possess excellent sound reduction capacity inherent sound insulating properties make it ideal for controlling noise

transmission between adjoining rooms

Higher sound insulation to be obtained based on the need by giving higherdensity blocks for special applications

reduces echo effect in an empty room


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d. GOOD WORKABILITY

Only material that can be easily cut, drilled, nailed and routed Faster installation of plumbing, electrical & other services

3.) PAINTS, FINISHES, ADHESIVES

Most finishes and adhesives contain volatile organic compounds (VOCs)

which outgas and adversely affect indoor air quality. Lower VOC and non-VOC products

are now readily available from many companies.

In India, the eco-labeling on paints is monitored by BIS which allows a

maximum of 5-30% of VOCs.

4.) HIGH PERFORMANCE GLASS

High Performance Glass is the one which reduces the ingress of the heat and at

the same time allows the highest penetration of the daylight.

Of late, glazing is a favored feature in the buildings. Glazing not only adds to

the aesthetic elements but it also has a good impact on the energy performance apart from

visual and acoustic effects.


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BENEFITS:

Energy savings up to 30-40% compared to conventional glass. Enhance occupant comfort due to access of day lighting.

Types of High Performance Glass:

a. INSULATED DOUBLE / TRIPPLE GLAZED.

1. GAS FILLED GLAZINGIt consist of two or three panes of glass, making it double/triple glazed. The

panes are spaced apart and sealed to make a single a single glazed unit, having air

space between the panes. Thus the glass layers and the air spaces resist the flow. GAS

FILLED GLAZING


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To improve the insulation, the gap between the panes is filled by inert gas as

these gases are good resistance of heat. Most commonly used gases are krypton and argon.

2. HEAT ABSORBING TINTSTTinted glass absorbs a large fraction of the incoming solar radiation. Grey & Bronze tinted

glazing reduces the penetration of light

and heat. Blue & Green offers a greater penetration to the heat and visible light.


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3.) GALVALUME SHEETS

Galvalume sheet steel having a hot-dip coating of corrosion resistant, aluminum zinc

alloy is available repainted from the manufacturer. The use of prepainted Galvalume sheet

offers the consumer many positive features in addition to the proven superior corrosion

resistance of the substrate. Compared with post painting, the features include:

More uniform paint coating. Reduction of in-plant rejections resulting from defective material treatments and

coatings.

Longer tool life because of prepainted Galvalume sheet's lubricity and non-abrasiveness.

Shorter production schedules by eliminating handling, cleaning and post-painting.


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Elimination of capital equipment by the fabricator; thus, saving money andmaintenance time.

Reduction of fire hazard and pollution problems by eliminating storage ofvolatile solvents.

No special tooling requirement because prepainted Galvalume sheet is generallyformed on press brakes and roll forming equipment with the same dies and rolls

used for bare steel.


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The Climatic Analysis

TEMPERATURE (degree celcious)

Mean Jan May Aug Nov

Max 29.30 44.00 29.90 30.30

Min 15.10 27.10 22.80 17.00

Highest 32.30 44.80 33.50 32.40

Lowest 10.70 23.20 21.20 13.10

Max Recorded 47.20

Min Recorded 5.00

HUMIDITY ( % )


Morning 52.00 38.00 86.00 53.00

Evening Nil Nil Nil Nil

Vap Pressure 10.40 17.30 25.70 12.90

Rainfall 900 mm

Annual total

Highest in 24 hr235.00 mm

WIND DATA (m/s)



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Morning NE/E W/SW W/NW NE/E

Evening NE/E W/SW W/SW NE/E

Speed 5.79 9.33 10.62 5.31

CLIMATIC ZONE:-


Zone T-HU VH-D T-VHU T-HU

T - Temperature > 35 degree

HU - Humid

VH - Very Hot

D - Dry

VHU Very Humid


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GREEN BUILDING PROVISION

1. Water Harvesting System

Catching rainwater when and where it falls for use during no monsoon months is

called rainwater harvesting. This can be done in two ways as surface water by diverting the

rainwater into tanks, ponds etc. or as ground water by ingesting it into the soil. In cities, due

to shrinking of open spaces, rainwater can be harvested only as ground water.

NEED FOR RAINWATER HARVESTING

What is presently happening in our city is that the areas around houses and flat

complexes are paved indiscriminately. As a result all the rainwater runs off into the road and

floods the area making life miserable. It is quite possible to put all this water into the soil

below with a little effort and expenditure so that the precious rainwater is not lost but

becomes available for our use subsequently.

BENEFITS OF RAINWATER HARVESTING

Rainwater harvesting replenishes the ground water table and enables our dug wells and

bore wells to yield in a sustained manner.

If the ground water happens to be brackish, harvesting will reduce the salinity. In areas

where the water becomes yellow due to presence of iron salts, rainwater harvesting will

progressively leach out these salts leading to clean water availability in the long run.

Flooding of low lying areas and roads can be avoided to a large extent, since rainwater that

is not harvested both within the house as well as outside is mainly responsible for flooding.

Roof rain water harvesting System


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The schematic below shows the roof rain water harvesting structure. Rain water

is collected from the roof and flows through the drain pipes to a filter below. The roof has a

gradual slope to direct the rain water towards the drain pipes see photo). At the rain center,

the drain pipes are 100 mm wide PVC pipes (see photo) whose average life is expected to be

around 10 years. People have also used cast iron pipes as drain pipes. The choice purely

depends on the individual's preference and cost. The drain pipes are covered with a drain

cover (see photo). The drain cover lets water flow into the drain pipe while holding back the

leaves, stones, and other garbage which can clog the drain pipe. Once in two years it is a

good idea to clean the drain pipes to ensure free flow of water.

When the rainy season begins, the initial water that pours through the drain pipes is not

saved. Instead it is discarded as "first flush" (see photo). This water theoretically just cleans

the drain pipes of dust, leaves, and other garbage collected over the rest of the year. Once the

first flush is cleared, the rest of the water flows through a filter (see photo) into the well at the

site. A total of four drain pipes drain into the filter. The dimension of the filter is as follows:

Length: 3 ft Width: 3 ft Depth: 10 ft

The bottom of the filter is filled with 4 feet of pebbles followed by coarse sand

up to 4 ft. The schematic is shown below. The filter can also be made of sponge, but the sand

and pebble arrangement is more economical. If water does not flow freely through the filter

and starts clogging the filter, then the filter will need cleaning. Cleaning involves removing

the sand and the pebbles from the filter and putting them back since over time the dust and

particles from the rain water can clog the pores in the sand and pebbles. The maintenance is

needed once every 10 years or so and costs about Rs. 200/-


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The water thus filtered is sent to the well attached to the rain center (see photo). When

required, the water is pumped (see photo) to an overhead tank (see photo).

Rain Water Harvesting in Building


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In the proposed school building the water harvesting system is provided as shown in fig. The

rain water is collected with the help of gutters provided to the roof of building and by using

P.V.C pipes the water is guided in a filter and then the filtered water is stored in a sump. The

sump is a underground structure of masonry or RCC in which filtered water is stored. The

filter is used to remove suspended pollutants from rainwater collected over roof. A filter unit

is a chamber filled with filtering media such as fibre, coarse sand and gravel layers to remove

debris and dirt from water before it enters the storage tank or recharges structure. Charcoal

can be added for additional filtration. After the water being stored in the sump it is raised inthe overhead tank by suitable pumping arrangement.

2.) Maximum daylight factor


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The maximum daylight factor concept is such that the maximum use of sun light can be

achieved by proper planning of the building. The size of courtyard should be such that the

shadow of any wing should not fall on another wing and the maximum use of light can be

achieved throughout the day.


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3.) Sun dial & Sun path

In case of planning for a Green Building Sun dial and Sun path are very important factors.

The planning should be done in such away that when sun deflects towards north during

summer then the minimum light should enter into the building and during the winter

maximum light should enter into the building.

4.) Roof ventilation

The roofventilation rage over the past 15 years has been continuous ridge and

soffit ventilation. These systems are nearly invisible and they create a system through which

air enters your attic space and then gently floats through the attic space. No matter what thetime of year, the air exits the attic space through small gaps at the peak of the roof. These
http://www.askthebuilder.com/NH039_-_Roof_Ventilation_with_Turbine_Vents.shtml##http://www.askthebuilder.com/NH039_-_Roof_Ventilation_with_Turbine_Vents.shtml##


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gaps are covered with any number of different products that allow air to pass, but prohibit

rain, snow and insects from entering your attic area. You can't see these vents as they are

almost always covered by the roofing shingles at the peak.

The mechanics of the air movement are quite simple. During warm weather,

the air inside your attic heats up. Since warm air rises, it tends to float out of the high

ventilation spaces. This convection movement naturally draws in cooler outside air to replace

the air that just exited.

Wind that blows across the roof any time of year also acts to vacuum air from

the attic space. The wind blowing across a roof can create a partial vacuum on the leeward

side of a roof. When the wind blows and at the right angle a significant amount of air can be

pulled through the attic space.

.

Turbine vents have been used for many years in both residential, commercial, agricultural

and industrial buildings. The vents are very affordable, easy to install, and they pump vast

amounts of air from attic spaces.

A small 12 inch diameter turbine vent with a constant wind speed of 5 miles

per hour (mph) can remove 347 cubic feet of air per minute (cfm) from the attic space. A
http://www.askthebuilder.com/NH039_-_Roof_Ventilation_with_Turbine_Vents.shtml##http://www.askthebuilder.com/NH039_-_Roof_Ventilation_with_Turbine_Vents.shtml##


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single 14 inch diameter turbine vent that is subjected to 15 mph winds can expel up to 1,342

cfm of air! If the winds are still, the vents still allow air to drift up and out of the attic space,

although not nearly as much

5.) TUBE COOLING

Earth Tubes (also known as ground-coupled heat exchangers, earth cooling

tubes or earth warming tubes) use the Earths near constant subterranean temperature to

warm or cool air for residential, agricultural or industrial uses. They are often a viable and

economical alternative to conventional heating, cooling or heat pump systems since there are

no compressors, chemicals or burners and only blowers are required to move the air.

Most systems are usually constructed from 100 to 600 mm (4 to 24 inch)

diameter, smooth-walled (so they do not easily trap condensation moisture and mold), rigid

or semi-rigid plastic, plastic-coated metal pipes or plastic pipes coated with inner

antimicrobial layers, buried 1.5 to 3m (6 to 10 feet) underground where the ambient Earth

temperature is typically 10 to 23 C (50-73 F ) all year round in the temperate latitudes

where most humans live. Smaller diameter tubes require more energy to move the air and

have less Earth contact surface area.

The higher the ambient temperature of the Earth, the less effective they are for

cooling and dehumidification. There are basically three configurations, a closed loop design,

an open 'fresh air' system or a combination:

Closed loop system: Air from inside the home or structure is blown through a U-shaped

loop(s) of typically 30 to 150m (100 to 500 feet) of tube(s) where it is moderated to near

earth temperature before returning to be distributed via ductwork throughout the home or

structure. The closed loop system can be more effective (during air temperature extremes)

than an open system, since it cools and recools the same air.

Open system: outside air is drawn from a filtered air intake. The cooling tubes are typically

30 meters (100 ft) long (or more) of straight tube into the home. An open system combined

with an Energy Recovery Ventilator (ERV) (Energy recovery ventilation) can be nearly as

efficient (80-95%) as a closed loop, and ensures that entering fresh air is filtered and

tempered.
http://en.wikipedia.org/wiki/Airhttp://en.wikipedia.org/wiki/Agriculturalhttp://en.wikipedia.org/wiki/Central_heatinghttp://en.wikipedia.org/wiki/Air_conditioninghttp://en.wikipedia.org/wiki/Heat_pumphttp://en.wikipedia.org/wiki/Celsiushttp://en.wikipedia.org/wiki/Fahrenheithttp://en.wikipedia.org/wiki/Energy_recovery_ventilationhttp://en.wikipedia.org/wiki/Energy_recovery_ventilationhttp://en.wikipedia.org/wiki/Fahrenheithttp://en.wikipedia.org/wiki/Celsiushttp://en.wikipedia.org/wiki/Heat_pumphttp://en.wikipedia.org/wiki/Air_conditioninghttp://en.wikipedia.org/wiki/Central_heatinghttp://en.wikipedia.org/wiki/Agriculturalhttp://en.wikipedia.org/wiki/Air


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Combination system: This can be constructed with dampers that allow either closed or open

operation, depending on fresh air ventilation requirements. Such a design, even in closed loop

mode, could draw a quantity of fresh air when an air pressure drop is created by a solar

chimney, clothes dryer, fireplace, kitchen or bathroom exhaust vents. It is better to draw in

filtered passive cooling tube air than unconditioned outside air.

Installation:

Whether using Earth Tubes with or without antimicrobial material, it is

extremely important that the underground cooling tubes have an excellent condensation drain

and be installed at a 2-3 degree grade to ensure the constant removal of condensed water from

the tubes. When implementing in a house without a basement on a flat lot, an external

condensation tower can be installed at a depth lower than where the tube enters into the house

and at a point close to the wall entry. The condensation tower installation requires the added

use of a condensate pump in which to remove the water from the tower. For installations in

houses with basements, the pipes are graded so that the condensation drain located within the

house is at the lowest point. In either installation, the tube must continually slope towards

either the condensation tower or the condensation drain. The inner surface of the tube,

including all joints must be smooth to aid in the flow and removal of condensate. Corrugated

or ribbed tubes and rough interior joints must not be used. Joints connecting the tubes

together must be tight enough to prevent water or gas infiltration. In certain geographic areas,

it is important that the joints prevent Radon gas infiltration. Porous materials like uncoated

concrete tubes cannot be used. Ideally, Earth Tubes with antimicrobial inner layers should be

used in installations to inhibit the potential growth of molds and bacteria within the tubes.

Efficiency and Effectiveness:

Earth cooling tubes vary widely depending on the location latitude, altitude,

ambient Earth temperature, climatic temperature-and-relative-humidity extremes, solar

radiation, tube diameter / length / depth, soil type (thermal conductivity), soil moisture

content and the efficiency of the building's exterior envelope design / insulation. Generally,

dry-and-low-density soil with little or no ground shade will yield the least benefit, while

dense damp soil with considerable shade should perform well. A slow drip watering system

may improve thermal performance. Damp soil in contact with the cooling tube conducts heat

more efficiently than dry soil.
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It is more efficient to pull air through a long tube than to push it with a fan. A

solar chimney can use natural convection (warm air rising) to create a vacuum to draw

filtered passive cooling tube air through the largest diameter cooling tubes. Natural

convection may be slower than using a solar-powered fan. Sharp 90-degree angles should be

avoided in the construction of the tube - two 45-degree bends produce less-turbulent, more

efficient air flow.

While smooth-wall tubes are more efficient in moving the air, they are less

efficient in transferring energy.

Larger tubes permit a slower airflow, which also yields more efficient energy

transfer and permits much higher volumes to be transferred, permitting more air exchanges in

a shorter time period, when, for example, you want to clear the building of objectionable

odors or smoke.

Earth cooling tubes are much less effective in hot humid climates (like

Florida) where the ambient temperature of the Earth approaches human comfort temperature.

However, they can be used to partially cool and dehumidify the replacement fresh air intake

for passive-solar Thermal Buffer Zone areas like the laundry room, or a solarium /

greenhouse, especially those with a hot tub, swim spa, or indoor swimming pool, where warmhumid air is exhausted in the summer, and a supply of cooler drier replacement air is desired.

Benefits:

In the context of today's diminishing fossil fuel reserves, increasing electrical

costs, air pollution and global warming, properly-designed earth cooling tubes offer a

sustainable alternative to reduce or eliminate the need for conventional compressor-based air

conditioning systems, in non-tropical climates. They also provide the added benefit of

controlled, filtered, temperate fresh air intake, which is especially valuable in tight, well-

weatherized, efficient building envelopes.

Alternatives:

An alternative to the earth-to-air heat exchanger is the "water" to earth heat

exchanger. This is typically similar to a geothermal heat pump tubing embedded horizontally

in the soil (or could be a vertical sonde) to a similar depth of the EAHX (earth-to-air heat

exchanger). It uses approximately double the length of pipe of 35 mm diameter, e.g., around
http://en.wikipedia.org/wiki/Solar_chimneyhttp://en.wikipedia.org/wiki/Solar_chimneyhttp://en.wikipedia.org/wiki/Solar_chimneyhttp://en.wikipedia.org/wiki/Solariumhttp://en.wikipedia.org/wiki/Fossil_fuelhttp://en.wikipedia.org/wiki/Global_warminghttp://en.wikipedia.org/wiki/Global_warminghttp://en.wikipedia.org/wiki/Fossil_fuelhttp://en.wikipedia.org/wiki/Solariumhttp://en.wikipedia.org/wiki/Solar_chimney


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80 meters compared to an EAHX of 40 meters. A heat exchanger coil is placed before the air

inlet of the HRV (heat recovery ventilator). Typically a brine liquid (heavily salted water) is

used as the heat exchanger fluid.

Many European installations are now using this setup due to the ease of installation. No fall

or drainage point is required and it is safe because of the reduced risk from mold


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Properties of Greenery to be provided

As Green Building is nature friendly structure, hence the Greenery to be provided

plays main role. The greenery should be such that,

The following trees are more important for green buildings in India,

1. Champa-Champa is a tree which is native to India. It has property that it is fully green

during summer and due to which it can block the sun rays and during the winter the fall will

take place and the maximum sunlight is achieved.

2. AshokaAshoka is a tree which is native to India. The property of Ashoka tree is that it acts

as sound proofing barrier.

- It should give maximum amount of shadow.- It should be pleasant appearance.- It should not completely block the sun rays.- More amount of flora and fauna which have large amount of Flowers should be used

to give the courtyard a pleasant appearance.

- Also the trees can act as sound proofing barriers.

The following trees are more important for green buildings in India,

3. Champa-Champa is a tree which is native to India. It has property that it is fully green

during summer and due to which it can block the sun rays and during the winter the fall will

take place and the maximum sunlight is achieved.

4. AshokaAshoka is a tree which is native to India. The property of Ashoka tree is that it act

as sound proofing barrier.


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Energy efficiency

Energy conservation is possible by judicious design of lighting and HVAC

(heating, ventilation and air conditioning) systems, controls and operation strategies.

Increasing insulation levels in conditioned buildings is regarded as the most cost-effective

investment in energy efficiency. Thermal insulation of external walls, roofs and floors, and

double-pane windows can reduce energy consumption for space heating by lowering heat

losses through the envelope of the building. Energy consumption for cooling is also reduced

because of lesser heat gains from outside through the envelope. Energy efficient windows

with their high thermal insulating values and spectral selectivity can make air-conditioning

systems work more effectively. This can lead to reduction in AC loads, lower consumption of

electrical energy and reduction in peak load demand. The use of energy efficient glazing

helps in minimizing unwanted solar gains in summer and heat losses in winter, while

maximizing the amount of useful daylight in buildings. Lighting load constitutes about 10 to

15 percent of the total electrical load of a building, and so energy efficient lighting systems,

such as compact fluorescent lamps and fluorescent tubes with electronic ballast, are generally

recommended instead of conventional lighting fixtures to reduce the lighting load. Although

the initial cost of such installation is high, they last longer and the running cost is also less.

As electricity is efficiently converted to light in energy efficient lamps, the amount of heatgenerated is also less.

Use of renewable energy technologies

Renewable energy systems are installed for meeting a partial load of the

building, thus considerably reducing the overall electrical and thermal load. Solar energy

could be utilized for a variety of purposes and in a number of ways: generating electricity,

providing hot water, and heating, cooling, and lighting buildings. Solar photovoltaic (PV) can

provide electricity for lighting. Solar thermal systems may be used for heating water or space

heating and transpired solar collectors can preheat air for the building's ventilation system.

Solar water heaters generate hot water at 60 to 85 degrees C and can conveniently be used for

domestic use. The usefulness of a solar water heater can be ascertained from the fact that a

standard 100 liter capacity system can be installed as an alternative to electric geyser for

residential use that can save 1500 units of electricity annually and could prevent emissions of

15 tons of carbon dioxide into the atmosphere every year. It is estimated in India that the use

of 1000 solar water heater of a 100 liter capacity each can contribute to a peak load saving of


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1 MW. In cold and sunny climates, solar air heaters can be used extensively to reduce

demand for electricity and firewood for space heating. Solar electricity can be generated by

integrating solar cells in buildings, on roofs and facades, or by installing grid connected

photovoltaic plants. It is an expensive proposition where grid connected electricity is

available, but for locations where conventional electricity is not available or the grid is far

away, it makes an ideal alternative. Further, building integrated PV (BIPV) systems may be

installed for the generation of electricity, and surplus electricity generated during non-

working hours could be fed to the grid. Inclined roofs, if oriented in the right direction, are an

ideal support structure for PV modules. In moderate to high wind speed locations, roof top

aero generators may be installed for the generation of electricity. A sunspace or solarium,

which comprises of a combination of direct and indirect gain systems, may be used to heat up

the living space by convection and conduction through the mass wall. Technologies have

been commercialized to convert the solid and liquid waste generated in a building to

productive use in the form of bio-fertilizer, gas for power generation, cooking etc. The long-

term objective is thus to reduce building energy loads in a cost-effective manner such that

renewable sources of energy can meet and exceed energy demand in the building.

Low energy materials and methods for building construction

The choice of building materials also substantially contributes towards

reducing the energy load of buildings. The use of conventional energy can be minimized by

use of low energy materials, efficient structural design and reduction in transportation energy.

Thus when building an energy efficient structure, it is necessary to closely examine the issues

of building materials and to make appropriate decisions according to local conditions.

Bamboo which is called the poor mans timber in India is also getting recognized globally as

a suitable building material because it is eco-friendly and highly suitable for energy efficient

buildings.

Waste water management

Our "blue" planet is abundant in water resources. But 97% of it is salt water

and 3% is fresh water. Two-thirds of this fresh water is locked in the polar ice caps. After

rainfall, only 9% of precipitation is captured for beneficial use and 91% is lost by

evaporation, transportation and run-off. Increased demand for water and its limited

availability make it essential to have an efficient water management system as well asstrategies for efficient water re-use. While water use can be minimized by reducing losses


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and adopting water efficiency techniques, there is great potential for reducing the overall

water requirement by recycling and reuse of water.

Architectural Techniques

Architects can achieve energy efficiency in the buildings they design by

studying the macro-and micro-climate of the site, applying bioclimatic architectural

principles to combat the adverse conditions, and taking advantage of the desirable conditions.

Some common design elements that directly or indirectly affect thermal comfort conditions

and thereby the energy consumptions in a building are:


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Why Green Buildings?

A study conducted by Energy Information Administration, (EIA) U.S.

Department of Energy indicates that there is a visible trend across the globe wherein the

growth rate in total energy consumption has been greater than the population growth rate. In

the developed countries the energy consumption growth rate is only marginally higher

compared to the population growth rate. For example, in USA, energy consumption is

projected to grow at 1.3% while the population growth rate is projected to grow at 0.8%. In

contrast, in developing countries like India population growth rate is expected to grow at

1.3% while the energy consumption rate is expected to grow at 4.3%.

This trend would strain the energy sector to a large extent.

The construction industry in the country is growing at a rapid pace and the rate

of growth is 10 %as compared to the world average of 5.2%. Hence energy efficiency in the

building sector assumes tremendous importance.

Commercial buildings are one of the major consumers of energy and are the

third largest consumers of energy, after industry and agriculture. Buildings annually consume

more than 20% of electricity used in India.

Health and buildings are closely linked. We all spend an average of over 90%

of our lives in buildings, which can affect our health in many different ways. For instance,

mental health can be badly affected in noisy buildings. Buildings can fall on people injuring

or killing them. Toxic emissions from finishing materials or mold growth can seriously

damage health. Sick building syndrome (SBS) is an example of how important buildings are

to the well-being of the ordinary citizen and how widespread health impacts of buildings are.

SBS is a recognized condition in which occupants of a building experience mild-to-acute

health effects that seem to be linked to the time spent in a building, but no specific illness or

cause can be identified. The complaints may be localized, that is associated with a particular

room or zone, or may be widespread. The incidence of SBS is particularly high in air-

conditioned buildings and can result in a wide range of symptoms from headaches to severe

physiological reactions. There is no single source of SBS although it is often linked to

unclean air-conditioning duct systems, lack of good ventilation and mould. The worst kind of

outbreak is associated with the fatal Legionnaires disease, which is on the increase in the UK

and many other regions of Europe. Perhaps the best way to reduce SBS is to design good


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robust passive, shallow plan, day lit, naturally-ventilated and finished offices for SBS seldom

occurs in such buildings.

Business Opportunities

There is a tremendous potential for construction of Green Buildings in India.

This could open up a plethora of opportunities for several stakeholders like construction

industry, architects, material, equipment manufacturers etc in India and abroad. While

constructing Green Buildings in India, the availability of materials and equipment is one of

the major issues to be addressed. Towards this objective, the Green Business Centre is

networking with several manufacturers in India to create new markets.

A few green materials and equipment are available in the country. To name a

few - Fly-ash cement, Fly-ash block, Recycled Aluminum, Recycled steel, Recycled tiles,

Low VOC paints, Bamboo based products, HFC based high efficiency chillers, Building

Controls, Green Roof, Recycled wood, etc.

However there is a huge market for green materials, which is still untapped.

Typical examples are - Composting toilets, waterless urinals, Low VOC adhesives &sealants, CRI certified carpets, FSC Certified wood, High albedo roof paints, BIPV, CTI

certified cooling towers, Living machines, etc.

The total estimated potential for Green Building materials and equipment is

about 4000 Million US$ by the year 2012. This potential is only for those buildings, which

would go for the LEED rated buildings. However there would be other buildings also which

would opt for green materials & equipment. Considering these buildings also, the overall

potential for Green Building materials & equipment would be nothing less than huge!

The estimated Green Building Materials & Equipment (Product-wise)

Business Potential in India by 2010 (from those aspiring for LEED rating buildings) is shown

below:

Sr No Materials & Equipment Potential

for Green

Potential

for Non

Total

potential


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Buildings

Million

US$ per

Year

Green

Buildings

per year

in million

USD

Million

US $ per

year

Materials

1 Fly ash based blocks 90 810 900

2 Recycled flooring tiles 10 90 100

3 CRI Certified Carpet 10 90 100

4 Recycled materials for false 10 90 100

5 Low VOC Paints 10 90 100

6 Recycled Particle & Gypsum

Boards

10 90 100

7 Recycled Aluminum works 10 90 100

8 FSC Certified Wood 15 135 150

9 Energy efficient Windows 10 90 100

10 High performance Glazing & Glass 15 135 150

11 High Albedo roofing paints 10 90 100

12 Eco Friendly Modular 25 225 250

13 Bamboo Products 15 135 150

Equipments


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1 HFC Based High Efficiency

Chillers

50 450 500

2 Variable Frequency Drives 10 90 100

3 Building Automation System 30 270 300

4 Solar PV 10 90 100

5 High efficiency light sources 10 90 100

6 Waterless Urinals 5 45 50

7 Composting toilets 5 45 50

8 Living machines 5 45 50

Total 365 3285 3650

Considering the tremendous potential available for green materials &

equipment, India would be the destination for several green materials and product

manufacturers.

Why people are attracting towards a green building?

This question has been posed to several occupants of a green building. Of all

the many reasons, three top reasons often cited by those occupying these buildings are the

following:

Operational Savings: Green buildings consume at least 40-50 % less energyand 20-30 % less water vis--vis a conventional building. This comes at an

incremental cost of about 5-8 %. The incremental cost gets paid back in 3-5

years time.


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Daylights & Views: Working in environment with access to daylight and viewsprovides connection to the exterior environment. This has a soothing effect on

the mind. Various studies prove that the productivity of people who have access

to day lighting and views is at least 12-15 % higher.

Air Quality: Green buildings are always fresh and healthy. Every greenbuilding will have to purge continuous fresh air to meet the ASHRAE 62

requirements. The green buildings use interior materials with low volatile

organic compound (VOC) emissions. A typical office building would require

purging of fresh air of about 15 cfm/person which provides a fresh ambience

inside the building.


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Conclusion:

With the tremendous growth the country is witnessing, energy efficiency in

buildings assumes paramount importance. The energy saving potential can be as high as 40-

50%, if addressed right at the design stage. There exist tremendous opportunities to introduce

new materials, equipment and technologies which can help enhance energy efficiency of

buildings.

The launch of LEED India Green Building rating system will facilitate to

advance the growth of green buildings in India. The Indian Green Building Council would

provide the right impetus for advancing the Green Building movement in India and enable

India to be recognized as one of the leaders in Green buildings.

It is high time that an Indian green building council is formed based on Indian

Conditions. India being a vast country, provisions also need to be made for utilization of

regional methods and materials. Concrete using fly ash or slag is known internationally as

green concrete. Such green concrete is being used in many projects in

India and due credit should be given to such projects. Local municipal corporations and

housing finance institutions should also be involved in rewarding the green achievements of

the builder by giving some sort of incentives by way of reduced property taxes, loans at

concessional rates, etc. Manufacturers and suppliers of energy efficient building materials

and alternative products, solid waste management and waste water recirculation system

suppliers, etc. can also be offered easy and low interest finance as well as tax concessions or

exemptions. In short, the concept of green buildings and its implementation should be made

optional so that the concept can develop on its own. Government should encourage it by

framing proactive provisions. If such guidelines are implemented in the right manner, then

the concept of green buildings would spread across the nation just like the IT revolution.


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References

1. SP16

2. Roof Material(Magazani)

3. Green Building.pdf

4. Indian Green Building counsil (www.igbc.com)
http://www.igbc.com/http://www.igbc.com/http://www.igbc.com/http://www.igbc.com/


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Documents

Project of Green Building