With the introduction of the EN ISO 9972, the requirement for the accuracy of the pressure gauges has been increased. BlowerDoor users have long been well equipped: Nothing changes for them, as all digital pressure gauges from BlowerDoor GmbH - even the older ones - have met these high accuracy requirements right from the start.

One of the most successful devices for airtightness measurements worldwide.
Unique precision and long-life cycle. Universal use in new buildings and rehabilitation of existing buildings.

With a measuring range of 5 to 2,300 m³/h, our compact BlowerDoor MiniFan System is perfect

The BlowerDoor MultipleFan System was developed for airtightness measurements of large industrial and administrative buildings.
As a modular system, it can be used also for single-family homes and apartment buildings using one or two BlowerDoor fans.

Choose between the manufacturer's calibration and the calibration with DAkkS-certificate as needed! An extensive functional test is included.


The MLM Measuring System has been developed in order to guarantee the functionality of ventilation systems by conducting airtightness tests of the duct system.
It is also suitable for testing building components as well as small and highly airtight clean rooms.

We offer free online training and short online presentations on various special topics from now on.

We look forward to the professional exchange with you.

Topics, dates and registration

This robust spraying system has been developed for mobile use at construction sites and creates a steady, closed film of water to simulate driving rain on building envelopes.