Passiv Haus

Our Company Director and Senior Architect, Paul Barnett is a certified Passive House Designer with the Passivhaus Institute based in Germany.

Passivhaus is a registered and certifiable system of building construction with particular defined performance criteria as follows:

The German Passivhaus Standard

The building must be designed to have an annual heating and cooling demand as calculated with the Passiv Haus Planning Package of not more than 15 kWh/m2 per year in heating or cooling energy OR be designed with a peak heat load of 10 W/m2.


0.60 ACH50 (air changes per hour at 50 pascals) based on the building's volume.

Advanced window technology

High performance triple glazed windows with argon gas and energy efficient coatings.

Space heating

Space heating and cooling energy demand of 15 kWh/year/m² of treated floor area and 10 W/m² peak demand.

Total energy to be used in the building operations including heating, cooling, lighting, equipment, hot water, plug loads limited to 120 kWh/year/m² of the floor area

Total Primary Energy

Source energy for electricity etc consumption (primary energy for heatinghot water and electricity) must not be more than 60 kWh/m2 per year.

High Insulation levels

R Values in floors of 1 to 2. Walls R4 and above, Ceilings R6 and above

Eliminating Thermal Bridges

Design and construct to element heat transfer through the building envelope by paying careful attention to construction detailing and construction work

Heat (or Energy) Recovery Ventilation Systems

Natural filtered ventilation as part of the Heat Exchange (or Energy Exchange in Tropical Climates) Ventilation system