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Guide to Improving Energy Efficiency

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myenergy days 2014
(EN) Find out how we can support your project - competent and reliable. (DE) Wir zeigen Ihnen gerne, wie wir Ihr Projekt unterstützen können - kompetent und zuverlässig. (FR) Laissez-nous vous montrer comment nous pouvons soutenir votre projet - compétent et fiable.

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PRIMe House update 12oct2012
Présentation du nouveau régime d'aides àpd 2013 - Updates regarding government subsidies after 2013

Prime House - Subsidien /Subsidies
offizielle Bekanntgabe der neuen staatlichen Förderung für energieeffizientes Bauen & Sanieren, ---- EN -----> official news regarding new state subsidies for energy efficient building & renovation

Offizielle Bestätigung - Avis public
Klasse B-C wird Mindeststandard für Neubauten ab Juli 2012 - CPE classes B-C deviennent exigences minimales pour les bâtiments residentiels à partir de 7/2012


Preliminary test
after building is sealed
(Low-energy house,
wood frame construction)


of the building

Blower Door Test

When is the Blower Door Test beneficial?

Air leaks in the building’s thermal envelope can be detected, quantified and resolved.

  • Reduced heat loss
  • Improved comfort
  • Avoid  moisture problems in the insulation (roof)
  • Avoid moisture problems in walls (wood-frame construction)

The proof of the airtight building envelope (blower door test) is a requirement for

  • Buildings with high energy efficiency (Passive house , low-energy house)
  • After installation of a controlled ventilation (for state subsidies)

In general, we recommend the blower door test for quality assurance after renovation work, in particular after roof insulation.

How is the Blower Door Test performed?

The test setup and procedure is laid down in detail in  DIN EN 13829. A large blower system is used to generate a constant positive pressure or negative pressure in the house. The air leakage is detected by a calibrated measuring system or can be made ??visible by smoke sensors, smoke generators or with an infrared camera.


Costs will depend on complexity of the project. Contact us for a non-binding offer.

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