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UK Context
UK 2008 Climate Change act set targets to reach of 80%reduction in CO2 by 2050 from 1990 baseline levels Maintaining UK Energy Security In 2010 we only produced 70% of of consumption
Increasing the use of Low – Carbon Technologies 2009 - 8,000MW 2012 - 15,479MW A 20% increase
UK Housing Context
Approx. 35% of all carbon emissions from built environment The average home emits over 5 ½ tons of
CO2 into the atmosphere every year
1 kWh Gas = 0.185kgCO2 1 kWh Electricity = 0.95kgCO2 27 million homes in UK – 59,000
refurbishments a month to reach targets!
Who are we? The Green Building Partnership is a Co-
operative of companies based in Brighton & Hove whose principle aim is to make
Brighton and Hove an exemplar green building city by providing professional
building refurbishment services to a wide range of clients, including but not restricted to community organisations, home owners,
landlords and the public sector.
Structure
Members
Associates
Green Building Partnership
Architects
Domestic Energy Assessors
On Construction Domestic Energy Assessors
Code for Sustainable Homes Assessors
Passivhaus Designers
Architectural technologists
Chartered engineers
Thermographers
Contractors – builders, electricians etc..
Financial Modeling
Cooperative Principles
Voluntary and Open Membership
Democratic Member Control
Member Economic Participation
Autonomy and Independence
Education, Training & Information
Co-operation among Co-operatives
Concern for community
What we do Working in Brighton & Hove
Energy Assessments
Project Management
Eco – renovation
Monitoring & Evaluation
Green Deal
"If you can not measure it, you can not improve it."
Lord Kelvin – Father of Thermodynamics
Energy Assessment
Standard Assessment Procedure for the Energy Efficiency of Dwellings SAP2010
Rating between 1-100
based on: Thermal efficiency of main house
structure
Type of ventilation and air permeability
Type of fuel used
Efficiency of heating & hot water system
Technologies such as solar or heat pumps
Adapted reports
The full service from initial survey, planning, building regs, site supervision
Architectural Services
Energy assessment, financial modelling, Cost Benefit Analysis
Energy Assessment & Financial modelling
Full on-site building services from start to finish
Project Management
A one-stop shop
Low Energy Assessment Fund 2012 - LEAF
Funded by DECC Feb/Mar 2012 - £60k
150 Home Energy Assessments
• Hanover
• Portslade
• Hollingdean
• Working with B&H 10:10 and the Brighton Energy Cooperative
Areas
Areas
Hanover
Portslade
Hollingbury
This showed that on average the houses in each of the areas would be suitable for substantial improvements to their homes
On average the homes could reduce their CO2 emissions by >40%.
This is also equivalent to an annual fuel cost reduction of >40%.
% reduction in CO2
CO2 emissions before and after
5205 4756
4247
2527 2609 2414
0
1000
2000
3000
4000
5000
6000
Hanover Hollingdean Portslade
Average emissions - current (kg / yr)
Average emissions - potential (kg / yr)
0,0%
10,0%
20,0%
30,0%
40,0%
50,0%
60,0%
Average % savings(per property)
LEAF in Hanover
The LEAF Project in Brighton & Hove
The Overall Hanover SAP results
0
5
10
15
20
25
30
A B C D E F G
Current
Future
Costs/Savings Costs Savings
£50 £64
£117 £154
£264
£306 £320 £336 £363
Cheapest Measures (£'s)
£257
£168
£99 £88 £57 £57 £54 £49 £41 £39
Measures with biggest savings (£'s)
Costs/Savings Costs Savings
2,7 3,6
4,4 4,6 4,9 6,7
9,5 9,6
12,0
17,0 Quickest payback (years) 1160
814 662
401 258 258 256 236 224 217
Biggest CO2 savings (kg/yr)
Actual savings in Hanover
Aggregated data for total CO2 emissions savings Total savings (all properties)
133,888 kg / yr Average savings (per property)
2,678 kg / yr Average % savings (per property)
50.4%
Aggregated data for CO2 emissions per house Average emissions - current
5,205 kg / yr Average emissions - potential
2,527 kg / yr Average savings
2,678 kg / yr
Green Deal Pioneer Places Project 2013
Funded by DECC Feb/Mar 2013 - £250k
• 100 Green Deal Energy Assessments across Brighton & Hove
• Up to £10,000 of energy efficiency improvements on 10 homes in B&H • Including EWI/IWI • Boiler changes • Heating controls • Loft insulation • LED lights
What is The Green Deal?
A government led framework to let owners and tenants pay for home improvements. The process: Assessment Recommendations Quotes for work Installation Benefits
Golden Rule: That the savings made in heating & electricity bills
will be greater than any repayment
Green Deal
Green Deal Pioneer Places 2013 Management
Executive
Financial Controller
Admin Manager
Contracts Manager
Architectural services
Main Contractor
subcontractors
Customer
Project Manager
Assessments
To watch the Video of The Green Deal Pioneer Places project please visit: http://youtu.be/nFQoLFigq20
Online Portal to keep real time data on the properties – Electricity & Gas
2 years
Measuring the relative humidity, moisture build up in critical junctions
2 years
AECB
Measure My Energy
On going Monitoring
Case Study – Internal wall Insulation
Adding 75 mm of PIR insulation to an Internal wall recues the U value from 1.76 to 0.25 W/m2K Heat Loss reduced by > 700% This is for an element that loses 33% of overall heat loss.
Case Study – External wall Insulation
Adding 50 mm of Cork insulation to an External wall reduced the U value from 0.52 to 0.28 W/m2K. A 185% improvement This is for an element that loses 33% of overall heat loss.
Case Study – Roof Insulation Adding 50 mm of PIR insulation between the rafters and 100mm over the top took the U value from 0.57 to 0.15 W/m2K. A 380% improvement This is for an element that loses 25% of overall heat loss.
Case Study – Floor Insulation Adding 50 mm of PIR insulation between the joists and 100mm of rockwool underneath took the U value from 0.71 to 0.18 W/m2K. A 394% improvement This is for an element that loses 15% of overall heat loss.
Case Study – Windows Converting single glazed window units to double or triple glazed alternatives is a possibility. U values from 4.5 to under 1.5W/m2K for argon filled d/g and <0.8W/m2k for t/g A 565% improvement This is for an element that loses 15% of overall heat loss.
Case Study – Other?
Solar PV & Solar Thermal Grass Roofs Loft Conversion Wood burning stove
Thanks for listening Any questions:
Alex Hunt
Sustainable Building Consultant 01273 906572
