ᐅ Decentralized ventilation / condensation?

Created on: 9 May 2013 07:32
A
ato
Hello,

I have a question about decentralized ventilation with heat recovery. Suppose I install an approved unit with heat recovery in the bathroom. The exhaust air is discharged outside through a wall outlet.

Wouldn't the moist air that is extracted normally condense inside the duct, causing condensate to run down the exterior cover on the facade?

Does anyone have a decentralized mechanical ventilation system with heat recovery installed in their bathroom? Please let me know if you have ever experienced such issues or how the condensate is managed.

Thank you!
A
ato
27 May 2013 05:45
Manufacturer’s response:
"A certain amount of condensation should be expected. It cannot be completely avoided from a technical standpoint."
HIGIL6 Jun 2013 13:57
Hello ato, in principle, decentralized ventilation units with heat recovery that operate in pairs should not be installed in wet rooms. Firstly, they cannot handle the high humidity in winter and may freeze, and secondly, you generally do not want moisture or odors entering your living areas, right? Therefore, exhaust fans should always be used in these rooms, preferably humidity-controlled.

Other rooms (living room, bedroom, etc.) can safely be equipped with these units. The wall penetration, usually a plastic duct, is installed with a slight slope of 1–2% toward the outside. If condensation occurs (during transition periods), it will drain outside.

Regards, HIGIL