Sanity check please on combustion analysis

FloMo201

Good morning,

I had my hot water gas fired boiler serviced this past friday. It is about 5 years old, 175btu, Peerless MI.

With knowledge learned here, i scouted out a new service company that would perform a combustion analysis. Tech told me everything was running fine. I asked about CO. He said, CO was about 20ppm, but never rose. I asked where taken and he told me through the draft opening so the tip is behind the vent opening. I also asked if that reading was high and he told me "not really, 100ppm is generally the limit." He did not give me any additional details.

I do have CO detectors in the basement and on every level of the house…the UL listed type, not low level. Boiler sits in an unfinished basement which is open…I never finished it.

For whatever reason this has been on my mind, so back your great minds. Thoughts?

Thank you, Flo

STEAM DOCTOR

20 ppm is fine.

SuperTech

Sounds ok to me. 20 PPM is normal. No worries if the draft on the chimney is ok.

I always recommend low level CO detectors. The typical UL rated hardware store detectors are barely better than nothing.

EBEBRATT-Ed

General rule is a boiler, or a furnace should be below 50ppm. 100 is allowable. 20 is fine

FloMo201

Thank you everyone. I will definitely get a low level. There is one that gets recommended here, i will find it.

For placement of a low level CO……basement or the first floor?

Thanks again, Flo