Hello,
I have a mechanical ventilation system with rotary heat recovery and moisture reclaim from Systemair, model VTR200B.
At cold temperatures, moisture accumulates inside the unit, and the internal insulation of the device door is completely soaked and shows ice formation, which can be somewhat seen in the pictures.
The moisture mainly forms in the exhaust air chamber.
I already had the service technician check it last year, but they could not find any technical defects. They responded that condensate hardly occurs with rotary heat exchangers.
Does anyone else have experience with this issue?
I have a mechanical ventilation system with rotary heat recovery and moisture reclaim from Systemair, model VTR200B.
At cold temperatures, moisture accumulates inside the unit, and the internal insulation of the device door is completely soaked and shows ice formation, which can be somewhat seen in the pictures.
The moisture mainly forms in the exhaust air chamber.
I already had the service technician check it last year, but they could not find any technical defects. They responded that condensate hardly occurs with rotary heat exchangers.
Does anyone else have experience with this issue?
With rotary heat exchangers, both heat and moisture can be transferred. The key factor is the material or surface of the storage medium. Extensive measurements at the building services testing facility of Lucerne University of Applied Sciences and Arts on rotors from different manufacturers have allowed characteristic performance curves to be determined for the various types. The reference value for the moisture recovery rate is the condensation potential, which is the difference in moisture content between the warm air and the saturation moisture of the cold air.
- The greater the condensation potential, the higher the expected amount of condensate on the warm air side.
- If the condensation potential is zero or negative, no condensate can form.
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