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Passivhaus

house-imagewebWhat is Passivhaus?

Quality - a design concept applicable to any building type, size, or location.
Comfortable – warm, no draughts in winter but well ventilated for summer.
Low energy – 80% less energy used compared to a current new build.
Proven – international scientific evidence for performance during use.

See the Passivhaus trust website for more information.

 

thermal-detail-webWhy use STREIF for Passivhaus?

Tried and tested construction delivering Passivhaus on a large or small scale.
In house specialist Passivhaus designers to help you from concept to completion.
Standard panel constructions with U-values <0.11W/m2K. Lower possible.
Thermally modelled standard details achieving zero thermal bridging.
Built in airtightness.

 

passivhausdesignerWhy build to Passivhaus?

Quality assurance standard - the stringent Passivhaus processes ensure design aims and promises are met on the construction site.
Maintenance – Passivhaus does not rely on expensive high maintenance technologies, like wind or solar, low energy is built in.
Intuitive – there's no extra burden placed on homeowner, a well designed Passivhaus works.
Cost affective – fabric first construction builds in low energy for the life of the building.

 

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Download an overview of Streif Passivhaus details

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Passivhaus, Code for sustainable homes, and BREEAM.

The Code for sustainable homes (for domestic properties) and BREEAM (for commercial properties) are rating tools for attempting to measure the overall sustainability of a development. Passivhaus is a design tool and construction standard purely concerned with achieving low energy consumption and comfort, and so fits in with - and enhances - both standards.

Passivhaus achieves the thermal performance required for good ratings in Code and BREEAM. It achieves Code 4 sustainable homes with very little extra input, and also achieves the thermal performance required for Code 6. By using sensible renewable technologies a Passivhaus can be made zero carbon.

 

What's not Passivhaus?

A sealed box - Passivhaus buildings can and should have opening windows!
A building without heating - a radiator, a towel rail, or a stove in key areas helps heat the whole building for those really cold damp days.
Stuffy - unlike traditional buildings a Passivhaus brings in fresh air whatever the weather outside, even with all the windows shut.
Onsite renewables – Passivhaus can have solar panels and wind turbines, but if the site is not suitable it doesn't need them to be a low energy building.