Can I shut down the ventilation unit during winter?
Shutting down the unit during winter
During operation, an enthalpy heat exchanger transfers not only heat but also moisture. Under normal operation, moisture is continuously removed by airflow. However, if the unit is switched off, residual moisture may remain in the exchanger, including in the channels for fresh air supply.
Risks when the unit is switched off
- formation of mold
- unpleasant odors
- reduction of hygiene of the entire system
- long-term reduction of exchanger efficiency
Recommended solution
- keep the unit running at least at minimum power
- ensure continuous ventilation even if the building is not occupied
If it is necessary to switch off the unit
In such a case, we recommend the following procedure:
- Remove the enthalpy heat exchanger from the unit.
- Clean it as follows:
- vacuum with a soft brush attachment
- rinse with clean water (max. 50 °C)
- Allow the exchanger to dry completely (min. 48 hours).
- Then:
- either return it back into the unit
- or store it in a dry and clean place
Important notice
Never leave a damp or contaminated exchanger in a non-operating unit. This may lead to its damage and a permanent reduction in performance.
This procedure is based on real operation and helps prevent the most common problems users encounter.