Air flow measuring tubes
The fixed air flow measurement outlets of the ventilation unit are located behind the name plate. The overall pressure of the supply and extract air ducts can be measured from measurement outlets with a differential pressure gauge. The pressure measurement results can be used to check the volume flow rate of each operating mode from the unit’s air volume table. The red measuring tube is on the pressure side and the black measuring tube is on the suction side of the fan.
The fan curves indicate the total pressure accounted for by duct losses.
Air flow measuring tubes - description of the diagram
- A
- Supply air
- B
- Extract air
- C
- Supply
- D
- Extract