Project Description. Projected build start date 12 Apr 2010 Projected date of occupation 28 Feb

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1 Project name PassivHaus Retrofit - Octavia Housing Project summary PassivHaus retrofit of a three storey solid brick Victorian terraced house in a conservation area. Produce a comfortable and healthy house that requires no conventional heating system. Our focus will be on the key areas of insulation, airtightness and thermal bridging whilst we will also use innovative renewable and low energy technologies to generate heat and power on site. Heat loss and airtightness will be measured before and after the retrofit. We will install ongoing monitoring equipment in two identical properties, which will act as control houses (renovated to Decent Homes and Decent Homes plus only) Project Description Projected build start date 12 Apr 2010 Projected date of occupation 28 Feb 2011 Project stage Occupied Project location London, London, England Energy target Retrofit for the Future Build type Refurbishment Building sector Public Residential Property type Mid Terrace Low Energy Buildings Page 1

2 Existing external wall construction Solid Brick Existing external wall additional information Exposed Bricks Existing party wall construction Solid Brick Floor area 89 m² Floor area calculation method PHPP Building certification Passivhaus certified Project team Organisation Project lead Client Architect Mechanical & electrical consultant(s) Energy consultant(s) Structural engineer Quantity surveyor Other consultant Contractor Octavia Housing Green Tomato Energy Octavia Housing Paul Davis and Partners Princedale Ltd. Eight Associates Brian James Pellings n/a Princedale Ltd. Design strategies Planned occupancy Space heating strategy Water heating strategy Fuel strategy Renewable energy generation strategy Passive solar strategy Space cooling strategy Daylighting strategy Ventilation strategy Airtightness strategy Strategy for minimising thermal bridges Modelling strategy Insulation strategy family of 6 people labyrinth heat exchanger air source heat pump to provide additional heating through the MVHR system when required solar thermal heat pump in MVHR unit to provide back up hot water sunelectricity from grid none full use of solar gains in winter labyrinth heat exchanger provides cooling in summer light colours existing windows balanced mechanical ventilation with heat recovery (MVHR) continuous OSB layer between layers of insulation, taped at joints secondary structure to support floor joists detached from the main external walls SAP & PHPP internal insulation continuous throughout the building Low Energy Buildings Page 2

3 Other relevant retrofit strategies Other information (constraints or opportunities influencing project design or outcomes) triple glazed sash windows, highly insulated doors conservation area Energy use Fuel use by type (kwh/yr) Fuel previous forecast measured Electri c Gas Oil LPG Wood 5359 Primary energy requirement & CO2 emissions Annual CO2 emissions (kg CO2/m².yr) Primary energy requirement (kwh/m².yr) previous forecast measured Renewable energy (kwh/yr) Renewables technology forecast measured - - Energy consumed by generation Airtightness ( 50 Pascals ) Date of test Pre-development airtightness - - Final airtightness - - Test result Annual space heat demand ( kwh/m².yr ) Space heat demand Pre-development forecast measured Whole house energy calculation method Other energy calculation method Predicted heating load Other energy target(s) PHPP 7.2 W/m² (demand) Building services Low Energy Buildings Page 3

4 Occupancy Space heating Hot water Ventilation Controls Cooking Lighting Appliances Renewables Strategy for minimising thermal bridges Building construction Storeys Volume Thermal fabric area Roof description Roof U-value Walls description Walls U-value Party walls description Party walls U-value Floor description Floor U-value Glazed doors description Glazed doors U-value Opaque doors description Opaque doors U-value Windows description Windows U-value Windows energy transmittance (G-value) Windows light transmittance Rooflights description Rooflights light transmittance Rooflights U-value Low Energy Buildings Page 4

5 Project images Low Energy Buildings Page 5

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