This picture explains in principle what a blower door test is. All the openings in the house (chimney, drains, vents for the heat exchanger etc.) are sealed off with tape. Then the house is pumped up to a certain pressure and the time is measured it takes for the pressure to drop. Then this is done in reverse: the air is sucked out of the bulding. All new houses have to have this done by law to conform to the high energy conservation standards. If leakage is found, then the builders have to put it right. If you want to read more about it in English, just click
here. For German
hier. Our house passed the test.
Now for the real pictures:
Bladders are inserted in the larger openings and blown up with a pump
Some of the equipment:
Getting ready to blow:
Fan and sensors:
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