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.

Smell from Buderus Exhaust

I notice that the vapor exhaust from my Buderus GB142 boiler smells like gas. Is this normal?


  • kcopp
    kcopp Member Posts: 4,443
    hard saying really... one person smells one thing... someone else nothing. The only way to really know what is going on is to do a combustion test w/ a analyzer. How old is the install?
  • Tinman
    Tinman Member Posts: 2,808
    The smell of unburned gas, natural or LP, from the exhaust is not normal. As @kcopp said, a combustion analysis and complete check out should be done.
    Steve Minnich
  • GW
    GW Member Posts: 4,702
    If the boiler isn't burning correctly it will eventually stop working, guaranteed. If you're really lucky it will plug up and you'll get to buy a new boiler. It's best to get a heating guy to service it, one familiar with the GB142
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
  • RemyHoH
    RemyHoH Member Posts: 2
    The boiler was installed 18 months ago. I kind of figured that it was unburnt gas. I'll look for a heating expert in my area.
  • nicholas bonham-carter
    Ask them directly if they have a combustion tester, as many HVAC companies do not.--NBC