Coventry Eco House

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A project vision for Coventry & Warwickshire FORCE Group to design and build two 3 bedroom detached houses for Orbit Homes that met the needs of the local community and to comprehensively assess the effects of building to UK Code Level 6 and to Passivhaus standard within a restricted budget. Both houses have received Passivhaus certification and one built to Code Level 6.
Images Graphs Figures Description Strategies Building

Coventry Eco House : Project images

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CO2 emissionsPrimary energy requirement
Energy target

Energy and fuel use

Fuel use by type
Primary energy requirement
CO2 emissions

Measured data from renewable generation is not yet available.

Fuel use

Electricity use - 6050 kWh/yr -
Natural gas use- - -
Oil use- - -
LPG use- - -
Wood use- - -
Other Fuel - - -
Primary energy requirement - 101 kWh/m².yr -
Annual CO₂ emissions - 24 kg CO₂/m².yr -
Annual space heat demand - 16 kWh/m².yr -

Renewable energy

Electricity generationForecastMeasured
Renewables Technology--
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
101 kWh/m².yr -
Annual CO₂ emissions
offset by renewable generation
24 kg CO₂/m².yr -

Calculation and targets

Whole house energy calculation method PHPP
Other whole house calculation method-
Energy target PassivHaus
Other energy targets-
Forecast heating load 10 W/m² demand


Pre-development air permeability test--
Final air permeability test-0.55m³/m².hr @ 50 Pascals

Project description

Start date18 March 2013
Occupation date11 November 2013
Location Coventry West Midlands  England
Build typeNew build
Building sectorPublic Residential
Property typeSemi-Detached
Construction typeSoftwood frame
Other construction typeBeattie Passive timber frame construction
Party wall construction
Floor area 149.8
Floor area calculation method Treated Floor Area (PHPP)
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

Project lead personOrbit/ Beattie Passive
Landlord or ClientOrbit
ArchitectASD Architecure
Mechanical & electrical consultant Building Services - Total Home Environment
Energy consultantHelen Brown, Encraft
Structural engineer
Quantity surveyor
ConsultantCertifier - BRE
ContractorBeattie Passive Construction Ltd

Design strategies

Planned occupancySix (6)
Space heating strategyVokera Linea One, Combi wall condensing gas boiler, 89.2% efficiency, supplying hot water and space heating
Water heating strategy
Fuel strategy
Renewable energy strategy
Passive Solar strategy
Space cooling strategy
Daylighting strategy
Ventilation strategyVentilation: Genvex GES Energy 1 MVHR, 76% efficiency
Airtightness strategy
Strategy for minimising thermal bridges
Modelling strategy
Insulation strategy
Other relevant retrofit strategies
Contextual information

Building services

Space heating
Hot water
Renewable energy generation system
Strategy for minimising thermal bridges

Building construction

Volume -
Thermal fabric area -
Roof description Beattie Passive Cold Pitched Roof 244mm with 100mm K5: 9.5mm Chipboard, 100mm Kooltherm K5EWB, 18mm chipboard, 12mm Versapanel, Low thermal res Platinum Ecobead 47mm, High thermal res Platinum ecobead 150mm, Low thermal res Platinum Ecobead 47mm, Polythene, 10mm Versapanel, 12.5mm Gyproc Duplex wallboard
Roof U-value 0.08 W/m² K
Walls description Beattie Passive Walls 244mm with 100mm K5: Brick 103mm, Kooltherm K5EWB 100mm, Versapanel 12mm, Low thermal res Platinum Ecobead 47mm, High thermal res Platinum ecobead 150mm, Low thermal res Platinum Ecobead 47mm, Versapanel 12mm, Polythene, Gyproc wallboard 12.5mm
Walls U-value 0.08 W/m² K
Party walls description
Party walls U-value -
Floor description Suspended ground floor, Beattie Passive Floor slab: Platinum Ecoslab foundation 100mm, Platinum Ecobead 100mm, 25% concrete Platinum Ecobead 47mm, 12.1% concrete Platinum Ecobead 100mm, 16.7% timber Platinum Ecobead 47mm, Chipboard 18mm, Platinum floorshield 25mm, Chipboard 22mm
Floor U-value 0.07 W/m² K
Glazed doors description Munster Passiv Futureproof uPVC
Glazed doors U-value - installed
Opaque doors description Munster Passiv Futureproof uPVC
Opaque doors U-value 0.79 W/m² K installed
Windows description Munster Passiv Futureproof uPVC
Windows U-value 0.75 W/m² K -
Windows energy transmittance (G-value) 61 %
Windows light transmittance -
Rooflights description
Rooflights light transmittance -
Rooflights U-value -