Minneapolis BlowerDoor: The Lord of the Rings!
The requirements for energy efficiency in buildings have increased enormously in recent years, not least for climate pro…
BlowerDoor GmbH
Minneapolis BlowerDoor: Der Herr der Ringe!
Die Anforderungen an die Energieeffizienz von Gebäuden sind - nicht zuletzt aus Klimaschutzgründen - in den letzten Jahr…
35 Jahre Minneapolis BlowerDoor in Deutschland
Als Pionier in den 80er Jahren gestartet, ist die BlowerDoor GmbH heute international gefragter Experte rund um das Them…
New at BlowerDoor GmbH: Fan Calibration according to Manufacturer's Specification
New at BlowerDoor since April 2023 is the calibration (1-point) according to manufacturer's specification for the BlowerDoor Standard measuring fan (model 4). One measured value is calibrated per measuring orifice. The requirement of ISO 9972 for the accuracy of the measuring systems of ± 7 % is assessed. A previous basic maintenance and functional test is included. We calibrate according to date request and ask for registration, in order to ensure short calibration times of max. 5 working days.
New: Factory calibration for BlowerDoor measuring fans on customer appointment
New at BlowerDoor since April 2023 is the calibration (1-point) according to manufacturer's specification for the Blower…
One for all: Minneapolis BlowerDoor
Minneapolis BlowerDoor measurement systems feature outstanding precision and durability. They are universally applicable…
Touch me now: The DG-1000 pressure gauge for precise BlowerDoor measurements according to ISO 9972
With the introduction of the ISO 9972 higher requirements apply to the accuracy of pressure measuring devices for air ti…
Touch me now: The DG-1000 pressure gauge for precise BlowerDoor measurements according to ISO 9972
With the introduction of the ISO 9972 higher requirements apply to the accuracy of pressure measuring devices for air ti…
Calibration of BlowerDoor Fans
The calibrations are conducted by an accredited lab and based on their traceability to national standards (EN 17025) provide maximum accuracy. Per flow-ring (open fan and rings A-E or 1-4), the calibration includes testing three values each in the lower, mid-level and upper flow-rate measuring range in a chamber test stand at a pressure differential of 50 Pa. The manufacturer recommends the calibration of BlowerDoor fans every four years.
How to correctly perform a BlowerDoor measurement in windy conditions?
Air flows due to wind are irregular and cause pressure fluctuations on the building. Overpressure occurs on the side of the building exposed to the wind, while suction occurs on the side away from the wind. These fluctuations also influence the BlowerDoor measurement. Learn more about BlowerDoor measurement in windy conditions in our January newsletter!
