Measuring and adjusting the air flows of the cooker hood

Standard ventilation

The volume flow rate of the air inside the cooker hood is measured with the damper closed and, where required, adjusted based on the static pressure loss and the performance scheme of the cooker hood.

  • The static pressure loss is measured from the hole in the damper using the measuring tube found in the accessory bag (see Figure).
  • Determine the volume flow rate from the performance scheme based on the measured pressure and the number of open holes in the damper.

The rate of air flow passing through the Vallox Captura cooker hood when the damper is open can be determined as follows:

  • Sum up the air flow rates of the building's extract air valves and subtract the result from the extract air flow rate of the ventilation unit's Boost mode.

Adjustment

  • Cover the required number of holes in the damper with the magnetic strip that is delivered with the cooker hood.
Table 1. Standard ventilation of the cooker hood (settings 2-8) - damper in the closed position
Adjustment positionHoles of the damper open
22
33
44
55
66
77
88
  1. Static pressure, Pa
  2. Air flow dm3/s