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Retrofit case study: Bournemead Close

Sustainability in Practice: Bournemead Close, London by ZEDfactory

Solar shed

Solar shed

Project data

House type 1950s semi-detached
Location Northolt, west London
Project team leader Breyer Group
Energy consultant Mark Gillott
Construction type Cavity brickwork with cavity insulation
U-values External wall, 16 W/m2K; roof insulation, 0.1 W/m2K; polystyrene beads blown into ground-floor void, 0.1 W/m2K
Services upgrading MVHR; condensing gas boiler and thermostatic radiator valves to existing radiators;
PV and solar hot-water panels on roof and facade of new ‘solar shed’ in garden; bespoke hot-water storage tank;
smart energy unit monitoring electricity and gas usage
CO2 emissions before retrofit 76kg/m2/year
Estimated CO2 emissions after retrofit 13kg/m2/year, 7kg saved by renewable energy
Percentage reduction 83 per cent

 

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