BlowerDoor

The ‘BlowerDoor Test’

Also known as: blowerdoor test, airtightness test, air permeability measurement, pressurization test, doorfantest. A blower door test is a measurement in which the air-tightness of the building can be measured accurately. The blowerdoor test is used in new construction, existing buildings, commercial buildings and hospitals. (both complete and partial buildings)

What does a BlowerDoor

The measurement itself is carried out by an exterior doorway which is provided with a frame, canvas and a special fan. The fan is connected to a specific air pressure gauge which can measure the air pressure of the fan and also the air pressure in the room. Now the “air loss” can be determined with the help of a computer. During the air-tightness measurement, the spaces are in over-pressure or under-pressure. (Air is sucked inside or outside) The method defined in NEN EN 13829 / NEN 2686. The equipment should be calibrated. The result of the measurement is in m3/hour; area: air leak flow rate: V50 = m3/h.

Objective measurement of the airtightness

Detecting air leaks:

• extra energy loss due to heating and cooling
• increased chance of condensation in the construction which negatively impacts health and comfort
• increased chance of bacteria exchange in cleanroom, hospitals, etc.
• greatly reduces sound insulation effectiveness
• the fire safety to be compromised

The order of the blowerdoor test is:

1. pressure measurements
2. leak search
3. seal leaks
4. 2nd airtightness measurements if needed

italics Dutch redgels