Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Hvac issue

raricky
raricky Member Posts: 12
in Indoor-Air Quality

Hi everyone

I am facing a very strange issue with our HRV(Fantec hero). Everytime we use air exhaust fan in washroom , right after it finishes its cycle we see bunch of mosquitoes coming from the air vent. I checked the HRV and there were bunch of them flying in the unit. They are not getting trapped in HRV prefilters. I did cleaned the core filter.
Any advise would be appreciated.

Thanks

Comments

  • 109A_5
    109A_5 Member Posts: 2,553

    Is there stagnant water in the vicinity where they are breeding ? Screens or filters not installed correctly or missing so they are getting in.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • HVACNUT
    HVACNUT Member Posts: 6,929

    Is the drain connected? Is it draining?

    The bath exhaust is a seperate appliance from the HRV, or the intake on the HRV is the exhaust for the bath?

  • raricky
    raricky Member Posts: 12

    @109A_5 The pre filters are installed in proper directions. I dont see any water pockets in the unit, not sure about the duct. Few days back when I cleaned the core filter we did not use the exhaust fan that day and nothing came out from the air vent. The moment I installed the filter back and turned on the exhaust fan they started coming back in again.

  • raricky
    raricky Member Posts: 12

    @HVACNUT The drain pipe is connected to the HRV. The bath exhaust is not a separate fan , the HRV( Fantech 250 H hero series) serves as the central exhaust fan for all 3 washrooms. But this issue pertains to master bedroom washroom only.

  • HVACNUT
    HVACNUT Member Posts: 6,929
    https://forum.heatinghelp.com/discussion/comment/1862575#Comment_1862575

    Is this a HERS rated house? I've never heard of using an HRV as bath exhaust. They're either ducted to the living space, or ducted to the HVAC system. The normal practice is, if no HRV, then bath exhausts on timers to get the air exchanges. And this is one HRV serving three bathrooms, or each bathroom has its own HRV?

    pecmsg

Categories