Blower Door

The Blower Door test (also known as air pressure leakage testing) is an internationally accepted test procedure according to DIN EN 13829. The objective is to check the building regarding to an inadvertent air exchange between in- and outdoors or between the individual rooms.

With the Blower Door test it is possible to detect

  • leakages
  • inadequate insulation

in the building envelope and to determine the air exchange rate (n50).

How does the Blower Door test work?

We use a Blower Door measurement device, which consists of a frame that is placed in the door or window opening and a high-performance fan to create the differential pressure. The frame is covered by a blanket (red colored in the picture) to seal the door opening airtight. Special measurement instrumentation is documenting the pressure difference during the test.

In the beginning of the measurement an under- or overpressure is created in the building. This helps to locate the leakages and to calculate the air exchange rate (n50). The air exchange rate indicates how often the air volume of the building is exchanged at a constant pressure of 50 Pa.

Reasons for a Blower Door test

The Blower Door test is used to verify the airtightness of a building.

A high airtightness means

  • a lower energy loss
  • a reduction of the risk of structural damages and mould formation resulting from high humidity
  • a constant comfortable temperature
  • no efficiency loss of the ventilation system
  • a good noise protection

The Blower Door test is possible in the inhabited or uninhabited building. After the measurement procedure you’ll get documentation with the results.

You are interested in a Blower Door test or need more information? Contact us!

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Boris Rieken
Boris Rieken

Tel.: +49 4222 - 805 805 0

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