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.

Hole in exhaust pipe

questions Member Posts: 2
<span style="font-size:12pt">I have a high efficiency Carrier furnace, installed in 2008. I just noticed that there is a ¼ inch hole drilled into the side of the PVC exhaust pipe. It looks deliberate, but non-expert-me doesn’t think we should have exhaust entering the house. Is this hole there for a reason?  see atached photo</span>


  • Bob Harper
    Bob Harper Member Posts: 1,034
    test hole

    Probably a test hole for combustion analysis. See if there isn't one on both the intake and exhaust. Should be sealed with a plug or RTV silicone. 
This discussion has been closed.