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The PassivHaus Standard

PassivHaus is arguably THE low energy, low carbon design standard as it addresses both climate change and the predicted shortage of fossil fuels. Developed in Germany in the 1990s, PassivHaus is based on the principle that reducing heating loss to a minimum is the most robust and cost effective way of achieving a low carbon building.

PassivHaus can reduce energy consumption by up to 90% by relying on a very simple set of premises:

  • Very high levels of insulation
  • Triple glazed, insulated windows
  • 'Thermal bridge free' construction
  • Virtually 'airtight' building fabric
  • Mechanical ventilation system to provide highly efficient heat recovery.

We are one of the few assessors with experience of PassivHaus

Whilst the principles behind it may sound simple - to achieve the standard it requires meticulous attention to detail and exacting design and construction on all levels. Energist's team of fully qualified Energy Assessors can guide you through the whole PassivHaus process.

As PassivHaus is a new concept in the UK, we are one of the few assessors with experience. We can provide technical advice and training on all aspects of PassivHaus. We use the PassivHaus Planning Package (PHPP) to model the energy demand of your dwelling. We will make recommendations and give design advice from the design stage meeting until final certification.


For the UK, a dwelling is deemed to satisfy the PassivHaus criteria if it has:

  • a maximum space heating and cooling demand of less than 15 kWh/m2.year or a maximum heating and cooling load of 10W/m2.
  • a maximum total primary energy demand of 120 kWh/m2/year.
  • an air change rate of no more than 0.6 air changes per hour @ 50 Pa.

Complete Energy Consultancy

For help and advice or to book an air test today call now on:

07771 964 593

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Complete Energy Consultancy have provided compliance services for our clients when required. The single point of contact prompt service and consistency have allowed us to verify compliance with the Building Regulations for numerous projects.
Paul Hughes - Act Building Control Ltd

Act Building Control Ltd

20th February 2012


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