How it works
7
2 How it works
2.1 Measuring principle
Fig. 1. Air flows–positive pressure
method,
Wöhler BC 600 mounted in the doorway
Fig. 2: Air flows–negative pressure
method,
Wöhler BC 600 mounted in the doorway
The Wöhler BC 600 Blower Check is used to de-
termine the air tightness of building envelopes to
DIN EN 13829 / ISO 9972. To do so, the blower fan
is mounted in a doorway or in a window opening.
The blower fan either blows air into (pressurizes) or
out (depressurizes) of a building until a specified
test differential pressure is established between the
indoors of the building and outdoors. The air infiltra-
tion rate resulting from the leakiness of the building
is calculated referencing standard conditions; this
then represents the leakage when the respective
test pressure is applied.
2.2 Operating the device
The device is operated using the Wöhler BC 600
app, which can be downloaded free of charge to
mobile devices running Android or iOS. It is also
possible to manage and evaluate the measure-
ment data in the app following a test. It is equally
possible to print and/or send a measurement cer-
tificate via the app. That means no operating unit
is required to control the device and no additional
software is required to evaluate the data.
It is also possible to search for leakages without
using the app. To do so, press the operating key
on the blower fan.
The connection between the blower fan and the
mobile device is established via a WLAN network
created by the blower fan.