Hart Lea - East Midlands Homes Regeneration
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as PDF Passivhaus Trust Awards 2014 Finalist - emH Homes and Encraft collaborated on this residential development in the East Midlands. The development consists of nine properties, construction of which was completed in October 2013. All properties met Code for Sustainable Homes Level 4 standards and 3 properties have received formal Passivhaus accreditation.
Hart Lea - East Midlands Homes Regeneration : Project images
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Energy and fuel use
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | - | 10500 kWh/yr | - |
|---|---|---|---|
| Natural gas use | - | - | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | 111 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | - | 26 kg CO₂/m².yr | - |
| Annual space heat demand | - | 19 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Renewables Technology | - | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 111 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 26 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 |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | 0.54m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 01 February 2013 |
| Occupation date | 01 December 2013 |
| Location | Sandiacre Nottinghamshire England |
| Build type | New build |
| Building sector | Public Residential |
| Property type | Mid Terrace |
| Construction type | Softwood frame |
| Other construction type | Val-U-Therm timber frame wall system with traditional timber tru |
| Party wall construction | |
| Floor area | 236.3 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | emh Homes |
|---|---|
| Project lead person | |
| Landlord or Client | |
| Architect | Geoff Carter Architects |
| Mechanical & electrical consultant | |
| Energy consultant | Encraft |
| Structural engineer | BSP Consulting |
| Quantity surveyor | Ridge and Partners |
| Consultant | |
| Contractor | Lindum Construction |
Design strategies
| Planned occupancy | Seven (7) |
|---|---|
| Space heating strategy | Glow Worm Ultracom 12sxi boiler, 89.5% efficiency, supplying two towel radiators and a hot water storage cylinder |
| Water heating strategy | Glow Worm Ultracom 12sxi boiler, 89.5% efficiency, supplying two towel radiators and a hot water storage cylinder |
| Fuel strategy | |
| Renewable energy strategy | |
| Passive Solar strategy | |
| Space cooling strategy | |
| Daylighting strategy | |
| Ventilation strategy | Ventilation: Airflow Duplex DV72 MVHR with 91% efficiency |
| Airtightness strategy | |
| Strategy for minimising thermal bridges | Heat Loss from Thermal Bridges reduced using a mixture of Advanced Construction Details and EST Enhanced Construction Details. Thermalite low density concrete blocks used in ground floor details with phenolic foam insulation in window reveals. Calculated y-value using ACDs and ECDs of 0.045 W/m2K |
| Modelling strategy | |
| Insulation strategy | |
| Other relevant retrofit strategies | |
| Contextual information |
Building services
| Occupancy | |
|---|---|
| Space heating | |
| Hot water | |
| Ventilation | |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | Timber Truss Roof: 150mm mineral wool with timber fraction .063, covered with 350mm mineral wool. |
| Roof U-value | 0.10 W/m² K |
| Walls description | ValUTherm Timber Frame Wall: 15mm Knauf Wallboard, 35mm low-e unventilated cavity, 25mm Celotex, Standard Vapour Control Layer, 9mm OSB sheathing, 235mm ValUTherm with timber frame fraction 0.1, 9mm OSB sheathing, Protect TF200 Thermo, 51mm low-e cavity, 103mm brick outer leaf. |
| Walls U-value | 0.09 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | Suspended Concrete Beam Floor: 150mm Concrete slab, 200mm PIR/PUR Insulation, 75mm Screed |
| Floor U-value | 0.11 W/m² K |
| Glazed doors description | Munster Future Passiv uPVC |
| Glazed doors U-value | 0.77 W/m² K uninstalled |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | Munster Future Passiv uPVC |
| Windows U-value | 0.74 W/m² K - |
| Windows energy transmittance (G-value) | 61 % |
| Windows light transmittance | - |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | - |