ᐅ Blower door test before ventilation system installation

To ensure a ventilation system delivers the energy savings promised by the manufacturer, the shell of the building should be tested with a blower door test. This costs between 400 and 1000 euros gross, regardless of whether the test is passed or not. We offer the blowcontrol-wall, which fits wall openings of 180 to 240 millimeters (7 to 9.5 inches) or, as usual, can be mounted in the window frame. The device costs 490 euros gross. Soon, a rental device will be available for 90 euros gross for 10 days. Since this fan only achieves 50 pascals, there is little risk of damage when using the rental device. The blowcontrol-wall creates up to 800 pascals negative pressure, which can cause adhesive tape to come loose. In any case, expensive tapes such as those from Siga and Würth are indispensable. And always remember: there is no universal adhesive tape, and PE foil should be at least 200 microns thick…