Meeting House Lane
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as PDF A new Passivhaus, detached house, in a conservation area with local clay brick for masonry wall wide-cavity construction. Overlooking was a significant constraint on the design, and decorative brick fins enliven the surface.
Meeting House Lane : 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 | - | 2440 kWh/yr | 3202 kWh/yr |
|---|---|---|---|
| Natural gas use | - | - | 7836 kWh/yr |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | 48 kWh/m².yr | 134 kWh/m².yr |
|---|---|---|---|
| Annual CO₂ emissions | - | 11 kg CO₂/m².yr | 28 kg CO₂/m².yr |
| Annual space heat demand | - | 13 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 | 48 kWh/m².yr | 134 kWh/m².yr |
| Annual CO₂ emissions offset by renewable generation | 11 kg CO₂/m².yr | 28 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 | 09 October 2015 | 0.39m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 20 January 2020 |
| Occupation date | 08 December 2015 |
| Location | Acomb, York North Yorkshire England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | Masonry Cavity |
| Other construction type | Brick externally |
| Party wall construction | |
| Floor area | 127 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | Anne Thorne Architects LLP |
|---|---|
| Project lead person | Junko Suetake |
| Landlord or Client | Private client |
| Architect | Anne Thorne Architects LLP |
| Mechanical & electrical consultant | Alan Clarke |
| Energy consultant | Alan Clarke, Junko Suetake |
| Structural engineer | SGM Structural Design |
| Quantity surveyor | Peter W Gittins & Associates |
| Consultant | WARM Low Energy Building Practice, ALDAS, Green Building Store |
| Contractor | Croft Farm Construction |
Design strategies
| Planned occupancy | One to two people |
|---|---|
| Space heating strategy | Heating from mains gas fired combi-boiler feeding radiators; Wood burning stove; Heat recovered from ventilation exhaust. |
| Water heating strategy | Combi boiler for DHW |
| Fuel strategy | Mains Gas. Mains electricity. |
| Renewable energy strategy | N/A |
| Passive Solar strategy | The house front is facing South East and South West. Window proportions optimised using PHPP. |
| Space cooling strategy | Cross ventilation and night cooling by natural ventilation. Opening windows, location and timings, at summer time is planned and confirmed by the user. |
| Daylighting strategy | Rooflights to the low ceiling first floor. |
| Ventilation strategy | Comfort ventilation with heat recovery (winter) Openable windows (summer) |
| Airtightness strategy | Concrete slab > 15mm two-coat plaster on the wall > Airtight membrane under the roof. The airtight chimney system for the wood-burning stove. |
| Strategy for minimising thermal bridges | Structural members are well inside the thermal envelope. |
| Modelling strategy | PHPP was used. |
| Insulation strategy | Full-fill cavity wall insulation with Dritherm. Warmcel to the roof. ThermofloorTF70 for the ground floor. All continuous via lightweight blocks or continuous geometry. |
| Other relevant retrofit strategies | |
| Contextual information | This two-storey detached house is built in the Acomb Conservation area and uses brick of clay dug out of the ground 9 miles away, and to provide a textured and simple finish. Masonry wall wide-cavity construction uses details developed by the Green Building Store. Decorative brick fins to the North windows enliven the surface as well as responding to the design constraint of overlooking. The beauty and character of the brick building are maintained while achieving high standards of thermal performance and comfort. |
Building services
| Occupancy | 1 to 2 |
|---|---|
| Space heating | Gas combi boiler to radiators. Wood burning stove RIKA Vitra Passive House with Passivhaus certified chimney system Schiedel Absolut Xpert (Drawing at the bottom this page.)Location of the MVHR is away from the roof where it would draw in drifting smoke from the woodburner chimney.A stove is planned for the living room. This is room-sealed with external air supply from the Shiedel air-supply chimney. A small output stove is selected, even though the open plan design of this house means that the stove can heat the whole building by natural convection provided bedroom doors are left open. The steady state heat load of the house is estimated at 1.4kW, and the average daily heating demand in December is 16kWh, so this requires a 2-4kW stove burning for 4-8 hours/day (if no gas backup is used). |
| Hot water | A combi boiler is proposed for radiator heating and hot water. For the peak heating demand here, only 1.4kW, we wanted to choose a boiler with low output to heating. The excess heat output needs to be buffered by the water volume and thermal mass of the radiators, in order to prevent the boiler temperature rising too high. |
| Ventilation | Heat recovery ventilation: Passivhaus certified MVHR Paul Focus 200. Commissioned by Green Building Store. It has a separate frost heater. The frost heater is in the workshop to save space in the utility room enabling the MVHR to go close to the ceiling and leave some worktop space clear below.Heat Recovery 89.8 % Specific power input 0.31 Wh/m3The MVHR unit was installed inside the thermal envelope (in the utility room). Ducts are Lindab steel ducts. The cooker hood in the kitchen is a circulating model with a filter. The wood burning stove is with the insulated chimney to supply the air as well as to extract in a closed area within the stove and chimney. |
| Controls | Control system of the boler. |
| Cooking | Gas |
| Lighting | Selected from LED ranges. |
| Appliances | Low energy appliances |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges | Lghtweight concrete blocks are used for its low thermal conductivity. Compacfoam is cast to the concrete slab to receive the door threshold. |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 367m³ |
| Thermal fabric area | 3736 m² |
| Roof description | Plasterboard+50mm sheep wool Thermafleece insulation + Airtightness membrane+ Cellulose fibre insulation Warmcel between 406mm I-joists +100mm Steico Special Dry woodfibre insulation board + Tybek membrane + Sandtoft roof tile |
| Roof U-value | 0.07 W/m² K |
| Walls description | Inside 15mm two-coat plaster + 100mm concrete block Airtec Seven + 300mm water repellent glass mineral wool insulation DriTherm Cavity Slab 32 Ultimate + brick York Handmade Brick |
| Walls U-value | 0.10 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | Tile finish + 150mm concrete slab + 400mm Kingspan ThermafloorTF70 insulation |
| Floor U-value | 0.06 W/m² K |
| Glazed doors description | Passivhaus certified component, Progression, inward opening Green Building Store |
| Glazed doors U-value | - - |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | Passivhaus certified component, Progression, inward opening Tilt & turn Green Building Store, triple glazed timber & cork frame windows. Uf value 0.83 W/(m2K) (Bottom 0.81 W/(m2K))Glazing Planitherm Lux g value 0.62 Ug value 0.618 W/(m2K)Saint Gobain Planitherm Ultra N g value 0.50 Ug value 0.530 W/(m2K) |
| Windows U-value | - installed |
| Windows energy transmittance (G-value) | 0.62 % |
| Windows light transmittance | 0.62% |
| Rooflights description | Rooflight FAKRO FTT U6 Uf value 1.2 W/(m2K) Ug value 0.75 W/(m2K) |
| Rooflights light transmittance | 0.45% |
| Rooflights U-value | - |