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Retrofit case study: Terraced house, Bristol

Sustainability in practice: Terraced house, Bristol, by White Design

Project data

House type 1910s mid-terrace
Location  Bristol
Project team leader Self Help Community Housing Association
Energy consultant Arup
Construction type Rough-cast solid brickwork
U-values  External wall insulation 0.15W/m²K; traditional sash windows with internal casements to front  and triple glazed rear windows 0.8W/m²K
Fabric upgrading  Roof opened up into void with rooflight over stairs; draught lobbies to external doors
Services upgrading MVHR; high efficiency gas boiler with radiators and thermostatic valves; solar hot-water panels; smart real-time control unit for energy and water usage and access to local transport info.
CO² emissions before retrofit  79kg/m²/year
Estimated CO² emissions after retrofit 15kg/m²/year
Percentage reduction 85%

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