I’m looking for feedback on the HVAC course. Have you taken the course?
After talking with HVAC code inspectors and HVAC contractors over the past two years they have finally convenced me that the only way to accurately test a furnace for CO in relation to a defective heat exchanger is through an anlysis of the flue gases. And even then it’s not definite.
My research on this topic and my personal inspections of over 1500 furnaces where I’ve tested these theories has comfirmed what they’ve been saying. I don’t have the time to get into all the details as it’s a laborous conversation and a conversation about this topic on a BB doesn’t work.
I started a personal mission over two years ago with an objective to convince myself of the best and most fool proof way to test for HE defects (beyond the limited visual inspections). At first you get the standard responses that likely 99% of the HIs use to inspect HEs. But once you start digging and asking lots of questions (and they realize you’re not going away) it’s amazing what the “experts” say about HE defects and testing.
To date I know of only two ways to accurately inspect a heat exchanger (beyond the typical mirrors and visual inspetion) and they both involve some disassembly of the furnace which is beyond our SOPs. Now I’m looking at getting into the flue gas analysis so I can at least be somewhat accurate when telling my clients about the condition of their furnace (heat exchanger).
So what I’m looking for is information on what the NACHI class covers in relationship to the testing of the flue gases and if they show how to use the testing equipment.
There’s three NACHI CMI inspectors in my area who have asked me to set with them and discuss HVAC testing (and provide some basic training) and I told them to wait until I get a handle on this flue gas analysis thing. That’s why I’m asking about the NACHI course.