Measured data from renewable generation is not yet available.
Pre-development | Forecast | Measured | |
Electricity use | - | 15210 kWh/yr | - |
---|---|---|---|
Natural gas use | - | - | - |
Oil use | - | - | - |
LPG use | - | - | - |
Wood use | - | - | - |
Other Fuel | - | - | - |
Pre-development | Forecast | Measured | |
Primary energy requirement | - | 195 kWh/m².yr | - |
---|---|---|---|
Annual CO₂ emissions | - | 46 kg CO₂/m².yr | - |
Annual space heat demand | - | 20 kWh/m².yr | - |
Electricity generation | Forecast | Measured |
---|---|---|
Renewables Technology | - | - |
Other Renewables Tech | - | - |
Electricity consumed by generation | - | - |
Primary energy requirement offset by renewable generation | 195 kWh/m².yr | - |
Annual CO₂ emissions offset by renewable generation | 46 kg CO₂/m².yr | - |
Whole house energy calculation method | |
---|---|
Other whole house calculation method | - |
Energy target | AECB Silver |
Other energy targets | - |
Forecast heating load | 4.2 W/m² demand |
Date | Result | |
Pre-development air permeability test | 10 March 2009 | 2.13m³/m².hr @ 50 Pascals |
---|---|---|
Final air permeability test | 10 March 2009 | 2.13m³/m².hr @ 50 Pascals |
Stage | Occupied |
---|---|
Start date | 15 May 2009 |
Occupation date | |
Location | Polzeath Cornwall England |
Build type | New build |
Building sector | Private Residential |
Property type | Detached |
Construction type | Masonry Cavity |
Other construction type | |
Party wall construction | |
Floor area | 195 m² |
Floor area calculation method | Actual Floor Area (SAP) |
Building certification |
Organisation | |
---|---|
Project lead person | |
Landlord or Client | Mr & Mrs Webb |
Architect | Mark Kingsley Architects |
Mechanical & electrical consultant | Mark Kingsley Architects |
Energy consultant | |
Structural engineer | Whitby Bird |
Quantity surveyor | |
Consultant | |
Contractor | Gynn Construction |
Planned occupancy | 2 people permanent / 4 to 6 people occasional. |
---|---|
Space heating strategy | Ground source heat pump distributed via thermostatically controlled zonal wet underfloor heating system |
Water heating strategy | Ground source heat pump pre-heat with electric. |
Fuel strategy | Mains electricity. |
Renewable energy strategy | Solar Thermal ready design. |
Passive Solar strategy | Passive solar via south facing glazing. |
Space cooling strategy | Low technology design. External blinds to south facing glazing, high thermal mass with natural stack airflow from basement up stairwell and out of H/L clerestorey windows. |
Daylighting strategy | Open plan first floor living space achieves a minimum average daylight factor of at least 4%. All other rooms typically achieve an average daylight factor of at least 2%. |
Ventilation strategy | Whole House Ventilation System with Heat Recovery (MVHR). |
Airtightness strategy | Wet plaster coating to all internal masonry walls and between beam & block flooring beams. Vapour Control layer with taped joints to timber roof. |
Strategy for minimising thermal bridges | Thermal bridges reduced to a minimum. |
Modelling strategy | |
Insulation strategy | |
Other relevant retrofit strategies | |
Contextual information |
Occupancy | 2 people permanent / 4 to 6 people occasional. |
---|---|
Space heating | 6kW Kensa GSHP with 2 x 85m deep boreholes. |
Hot water | GSHP pre-heat with thermostat. Shower Drain Exchanger. |
Ventilation | Heat Recovery: Ubbink Medio throughout, advised efficiency of heat recovery 95% - (Netherlands standard NEN 5128) |
Controls | Room thermostat, three set points for MVHR |
Cooking | A+ Rated electric hob and oven. |
Lighting | 75% LED and 25% compact fluorescent |
Appliances | A+ Rated fridge freezer, washing machine and dish washer. |
Renewable energy generation system | GSHP. Solar Thermal ready but currently not installed. |
Strategy for minimising thermal bridges | Thermal bridge-free construction details throughout to no defined benchmarked standard. |
Storeys | 2 |
---|---|
Volume | 592m³ |
Thermal fabric area | 420 m² |
Roof description | 175mm thick insulation between timber rafters (175 x 50mm) at 600mm centres. Originally EPS insulation K value 0.030W/mK amended to PUR insulation type YBS, Thermal-Flect Roof Board PUR Gold K value 0.023W/mK. Slate roof finish over with vapour control layer under tape fixed to soffit of rafters. |
Roof U-value | 0.14 W/m² K |
Walls description | 100mm thick insulation board in cavity. Originally EPS insulation K value 0.038W/mK amended to PUR insulation type YBS, Therma-Flect Wall Board PUR with bonded Foil Bubble outer K value 023W/mK. |
Walls U-value | 0.19 W/m² K |
Party walls description | N/A |
Party walls U-value | 0.00 W/m² K |
Floor description | 100mm thick under 65mm screed on concrete slab. Originally EPS insulation K value 0.030W/mK amended to PUR insulation type YBS, Superfloor Polyurethane K value 0.023W/mK. |
Floor U-value | 0.14 W/m² K |
Glazed doors description | Triple glazed centrally sliding door with fixed light either side. Timber / Aluminium combi with a projecting cam open / close action to ensure moving light fully engages with seals upon closing. |
Glazed doors U-value | 1.20 W/m² K uninstalled |
Opaque doors description | Wood / Aluminium flush doors with insulated core. |
Opaque doors U-value | 0.74 W/m² K uninstalled |
Windows description | Timber / Aluminium combi windows with Triple Glazed Units |
Windows U-value | 1.38 W/m² K uninstalled |
Windows energy transmittance (G-value) | 0.52 % |
Windows light transmittance | 0.72% |
Rooflights description | None. H/L windows used. |
Rooflights light transmittance | 0.64% |
Rooflights U-value | 2.03 W/m² K |