Air flow measuring tubes

Air flow measuring tubes are placed in the ventilation ducts in accordance with the instructions. The standard air flow from the cooker hood is measured past the damper. The fan curves indicate the total pressure accounted for by duct losses.

R model in the figure. In the L model, the parts are mirrored.

Figure 1. Air flow measuring tubes Vallox 51 MV (left) and Vallox 51K MV (right)

Air flow measuring tubes - description of the diagram

A
Supply air
B
Extract air
C
Removing the cooker hood
D
Supply air fan
E
Extract air fan