The Passive Haus is a detailed standard of building from Germany, the results of applying this to construction are an ultra low energy building which requires very little energy for space heating or cooling.

The standard can be applied at Design stage to ensure that the building reaches those high standards of energy efficiency that can be difficult to achieve. The buildings often have considerably less difference between the design aspirations and building energy use in practice than a standard development.

EnerPHit Standard for refurbishments

Passivhaus certification is also possible for very low energy retrofit projects: EnerPHit is a slightly relaxed standard for retrofit projects, where the existing architecture and conservation issues mean that meeting the Passivhaus standard is not feasible.

To achieve the Passivhaus Standard in the UK typically involves:

  • Very high levels of insulation
  • Extremely high performance windows with insulated frames
  • Airtight building fabric
  • ‘Thermal bridge free’ construction
  • A mechanical ventilation system with highly efficient heat recovery

The Passiv Haus methodology can be used on projects to provide low energystandards, high level of internal comfort and high standards of detailing.

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