21
Optimizing the air flow
Outlet dimensioning
It is important that the dryer has the correct air volume compared to each dryer’s effect.
If the air flow is below the minimum, the dryer will be forced to switch the heating off thus
prolonging the time it will take to dry the load.
An air flow above the needed is unnecessary and can result in a cold laundry room and
noise from the piping and outlet and in extreme cases prolonged drying time.
For brief evacuations and where there are high airflows, the tumble dryer must be
adjusted to optimal flow. One way in which this can be done is by using an "Iris
valve” (a valve specially designed to regulate airflow).
Table with air volume and dryer effect
Optimum volume
Air volume
The curves on the next page shows the characteristics of the dryer. By measuring
or calculating the back pressure of the outlet pipe it is hereby possible to find the
corresponding air flow into the room and through the dryer and exhaust.
Air flow
Type
Effect
kW
Optimum
air volume
m
3
/h
Corresponding
back pressure
Pa
T4190
6,0
270
380
8,0
290
350
