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Question about mechanical heat recovery internal intakes

  • 30-04-2023 10:40am
    Registered Users Posts: 251 ✭✭

    Hi all, we have mhrv for 2 years, all works great, one question I find it very hard to get answered well online is which rooms should be sucking air to the system (extracting) and which rooms should be supplied fresh air.

    It's one aspect of the build that I didn't get to chat with the installers about as they were in and out very quickly.

    From what I can gather the vents in the bedrooms and a living area are extracting air. Everywhere else such as the kitchen and bathrooms are supplying (blowing air).

    Does this sound right? I presumed the bathrooms would be extracted.

    The bathroom dries very quickly after a shower, towels will dry overnight hanging up so it seems to be working ok. Just curious if the setup sounds ok.


  • Moderators, Home & Garden Moderators Posts: 6,012 Mod ✭✭✭✭graememk

    If it's working well, I'd leave it be.

    Although I would thought that the kitchen and bathrooms would be extracting air (eg humidity/smells from the bathroom, and the same from the kitchen)

    And then blowing air into the living space.

    Bedrooms I'm not sure.

  • Registered Users Posts: 11,178 ✭✭✭✭the_amazing_raisin

    From what I've found it should be the other way around, air from bathrooms, kitchen and utility room is extracted while other rooms are intake

    The idea being to remove any smells or damp air from those rooms and pump fresh warm air into the bedrooms. The resulting movement of air in the house should cause air to move from the bedrooms to the bathrooms and kitchen

    "The internet never fails to misremember" - Sebastian Ruiz, aka Frost