Lynn Crescent Passive House, Orkney

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The project transformed a disused former boiler house and biomass store into new residential home for Orkney Housing Association. The existing single storey building was utilitarian in appearance, set within a residential area. The boiler house comprised masonry walls and concrete tiled pitched roof, while the biomass store's walls were of thick reinforced concrete. The design philosophy aimed to:1. Preserve as much of the existing fabric as possible.2. Transform the building to have a domestic appearance.3. Achieve a low energy solution to minimise the residents fuel bills.4. Achieve Passivhaus Certification.The Lynn Crescent Passive House is the most northerly Certified Passivhaus in the United Kingdom, and the smallest inhabited Passivhaus in the Northern Hemisphere.
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Lynn Crescent Passive House, Orkney : 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 - - -
Natural gas use- - -
Oil use- - -
LPG use- - -
Wood use- - -
Other Fuel - - -
Primary energy requirement - - -
Annual CO₂ emissions - - -
Annual space heat demand - - -

Renewable energy

Electricity generationForecastMeasured
Renewables Technology--
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
Annual CO₂ emissions
offset by renewable generation

Calculation and targets

Whole house energy calculation method
Other whole house calculation method-
Energy target PassivHaus
Other energy targets-
Forecast heating load -


Pre-development air permeability test--
Final air permeability test--

Project description

Start date
Occupation date
Location Kirkwall   Scotland
Build typeMixed
Building sectorPublic Residential
Property typeDetached
Construction typeOther
Other construction type
Party wall construction
Floor area 40
Floor area calculation method -
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

OrganisationOrkney Housing Association
Project lead person
Landlord or Client
ArchitectRobert Potter & Partners in association with Architeco
Mechanical & electrical consultant
Energy consultant
Structural engineer
Quantity surveyor
ContractorOrkney Builders Ltd

Design strategies

Planned occupancy
Space heating strategy
Water heating strategy
Fuel strategy
Renewable energy strategy
Passive Solar strategy
Space cooling strategy
Daylighting strategy
Ventilation strategy
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
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 -