Originally Posted By: rhinck
This post was automatically imported from our archived forum.
I did a an inspection on a 1966 single level duplex on a crawlspace the day be fore yesterday. The furnaces are counterflow original with the building. I did my temp diff. evaluation on the A/C units first. Next, even though is was 90 degrees and 85% humidity here in central Illinois, I fired each furnace to check for proper operation. Knowing that they have not been on for a couple of months at least, I ran them for a good 15 minutes. I didn’t notice anything odd with the burner flame, but using a Tif 8800 I detected possible CO at each floor diffuser. I reported possible CO present and recommended further evaluation by a HVAC tech. The owner of the building is a builder and had his HVAC guy take a look, could not find any evidence of cracks plus used a different brand of detector and claimed nothing was detected. He calls me up telling me I was blowing his deal, FSBO of course, and was real pissed. I contacted my HVAC guy, I am and have been a home builder for 30 yrs, and he told me that counterflow units have a real tendency to cracking due to the blower does not come on as quickly as an upflow unit. This has turned into a pissing match about who’s detector is right. Any help?