It is very important that an air distribution system
be evaluated by a competent institution. The most important
points of comfortable ventilation are:
• a low sound level and
• a pressure loss as small as possible.
Therefore the RoomAir ventilation components are
examined by HSLU in Lucerne, test center HLK, regarding:
• Sound: Task: How much is the sound level reduction
and the sound performance of RoomAir ventilation components?
• Pressure loss: Task: How much is the pressure loss
caused by RoomAir ventilation components?
Sound measurements were made to determine the influence
of the air distribution system on the reduction of the sound
level and the sound power of controlled room ventilation.
The tests have shown that the geometry and execution with
plastics of the ventilation components have a very positive
influence on the development of noise. The result regarding
sound power cannot be summed up more concisely than in the
„For the air inlet at the air distribution box the
flow noises at volume flows < 41 m3/h would have been
interesting. But it is not possible to measure the sound
power levels at these volume flows with the current measuring
Pressure loss measurements
To make sure that a comfortable ventilation operates without
problems, the pressure losses of the individual parts must
be known. Also in this field the results of the RoomAir
ventilation components are excellent: The hexagonal air
collection and distribution box with the central air supply
produces a very uniform pressure distribution. The test
centre HLK reports:
„As a precautionary action the flow distribution in
the air distributors and air collectors has been looked
at closely before starting the pressure loss measurements
to find out if any balancing is needed. Preliminary measurements
at different volume flows have shown that specifically for
the pressure loss measurements of each unit under test no
balancing is needed because the flow distribution in the
distributors is even."
Not only the air collection and distribution boxes show
excellent results, also the air inlet and outlet boxes show
a very low pressure loss.
The exact measuring values can be taken from the detailed
test report HP-07654. Due to the large amount of data of
the report, a summary can be downloaded: Test
report Pressure Loss Measurements HP07654-1, (1,3 MB,
The detailed test report can be asked for from RoomAir.