If you have a pollen allergy, you will benefit from installing a pollen filter in the outdoor air intake of the ventilation unit. The pollen filter helps create a good indoor climate for people who are allergic to pollen by filtering out pollen.
The filter in extract air remains a standard one, and you should therefore be aware that the intervals between replacements of the two filters differ. Generally, a pollen filter does not need replacing as often as a standard filter since the total filter area of the pollen filter is considerably bigger.
As standard, Nilan’s units for commercial use are delivered with a pollen filter in the outdoor air intake.