Barratts - Code for Sustainable Homes

8/6/2019 Barratts - Code for Sustainable Homes

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Presentation for Barratt Homes North East

Alex HopeBSc GradEI CMI


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` Who am I?

` Code for Sustainable Homes

` PPS22 and the Merton Rule

` How to achieve CFSH Efficiency Criteria (Ene 1)

` How to achieve CFSH Renewables Criteria (Ene 7)

` Code level 6

` Questions


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` Environmental Assessment Method

` Prepared by Government in consultation with industry

and NGOs

` Closely linked to the Building Regulations

` Intended that the code will signal the future direction of

the building regulations in relation to energy use andCO2 emissions


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` Employed by Northumbria University in partnership with

North Tyneside Council

` Sustainable Energy Systems Officer working on the

Older Peoples Homes for the Future PFI project

ExpertiseExpertise

` Environmental Management and Energy Policy

` Decentralised Renewable Energy Systems

` Northumbria University Sustainable Cities Institute

` PhD Local renewable energy resource mapping


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To society

` Reduced greenhouse

gas emissions

` Better adaptation to

climate change

` Increase security ofenergy supply

` Reduce levels of fuelpoverty

To House Builders

` Improved comfort andsatisfaction forinhabitants

` Differentiate companyfrom competitors

` Excellent PR

` Increased quality control

` Regulatory certainty


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Managementealt &

Well eing

Energy & CO2

Water

Materials

Land Use &

Ecology Pollution

Surface Water

Run-off

Waste


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` Mandatory for all new social housing to be built to Codelevel 3

` Voluntary for private house builders

` Mandatory for privately built housing to have a coderating in the Home Information Pack

` Local authorities increasingly asking for codecompliance through planning agreements

` With tightening of building regulations some parts of thecode will essentially be mandatory for all housing


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` PPS22 - Local planning authorities may include policies in

local development documents that require a percentage of

the energy to be used in new residential, commercial or

industrial developments to come from on-site renewable

energy....

` London Borough of Merton first to formalise requirements

asking for 10% renewables

` Government expect all planning authorities to include policies

in their development plans that require a percentage of the

energy in new developments to come from on-site

renewables.


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` Back to basics!!

` Maximise passive solar gain

` Minimise energy loss using the buildings fabric

` Only THEN consider renewables


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Ene1 Dwelling Emission Rate - MANDATORY

Code Level 3 = 25% improvement of DER overTER (building regs)

Code Level 4 = 44% improvement of DER overTER (building regs)

Code Level 5 = 100% improvement of DER over

TER (building regs)

Code Level 6 = Zero Carbon


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` Maximises the use of naturalflows of heat, energy and light

` Orientation

` Day lighting

` Ventilation

` Thermal Mass construction


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` Minimises heat losses

` Excellent levels of airtightness

` High levels of insulation

` Minimal thermal bridges

` Mechanical ventilation

and heat recoverysystems


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` 270mm Insulation to loft

` Floor insulation

` Wall insulation

Structured Insulated

Panel System (SIPs)

` Masonry/Cavity wallconstruction???


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` Hanson QuickbuildWalling System

` Brick and blockcavity wall

` Factory fabricated

` U values of

0.15W/m2

` q50 value of5m3/(h/m2)


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` Control lighting for

presence of daylight

`

Control Heating,ventilation and shading

systems

` Smart metering

provides feedback tousers helping reduce

consumption


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Ene7 Low or Zero Carbon technologies OPTIONAL

` Ground Source Heat Pumps

` Air Source Heat Pumps

` Solar Thermal` Solar Photovoltaic's

` Micro Wind

` Biomass

` Micro Hydro

` Combined Heat and Power


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` Temperature below

ground is constant 10-

13

` Heat in the winter/cool in

the summer

` Installed as surface

collector or borehole

` Typically coupled with

under-floor heating


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` Highly efficient

` Low maintenance

` 50+ year lifetime

` Provide heating ANDcooling

` High capital cost

` Need suitable groundconditions

` Lack of suitableinstallers

` Need electricity topower heat pump

Advantages Disadvantages


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` Utilise energy fromoutdoor air

` Highly efficient

` Easily installed

` Provide heating ANDcooling

` Bulky equipment

` Noisy


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` Solar panels orcollectors - fitted toroof

` Panels collect heatfrom the sun'sradiation

`A heat transfer system

- uses the collectedheat to heat water


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Advantages

` Relatively low capital cost

`

Easy to install

` Long life span 40 years

` Provide up to 70% of

domestic hot water usage

Disadvantages

` Require southerly roof

aspect

` Only suitable for hot

water heating


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` Solar panels fitted toroof

` Convert sunlight intoelectricity


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Advantages

` Long lifetime

` Easy to install

` Can be grid connected or

stand alone

` Low maintenance

Disadvantages

` High capital cost

although decreasing at

average 4% per year

` Intermittent dont work

at night, or when cloud

cover is high

` Low efficiency levels


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Advantages

` Low capital cost

` Can be grid connected orstand alone

` Highly visible

Disadvantages

` Do not work well in urban

built up environments

` Require long location

specific surveys

` Highly visible


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` Utilises natural organic

materials

` Small scale domestic

systems use woodpellets, chips or logs

` Used at single

room/home/ communitylevel


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Advantages

` Easy to install

` Fuel readily available

` Proven technology

Disadvantages

` Still have to pay for fuel

` Can be high maintenance

` Best suited to community

applications


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` Generates heat and

electricity

`

Can be zero or lowcarbon

` Domestic and Community

scale


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Advantages

` Easy to install

` Provides heat ANDelectricity

` Simple to use

`

Can use biomass (ZeroCarbon) or natural gas

(low carbon)

Disadvantages

` Still have to pay for fuel

` Best suited to communityapplications

` Domestic CHP still

relatively new technology


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` Renewable technologies can be complementary

` Likely to require a mix of technologies for higher

code levels` E.G. Solar thermal and GSHP

` Solar PV and MicroWind


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` 100% Zero Carbon

` Includes energy consumption from appliances

(SAP 2009)

` Likely that community heat and/or power will be

best option

`

Possible option is ESCO/PrivateW

irearrangement


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Documents

Barratts - Code for Sustainable Homes