My new 2 month old install of Carrier 38hdr and Performance series went well.
Backround: Small 887 sq. ft condo unit with the furnace and coil unit in one of those small hallway closets. Generous return right below at same.
As you all know...when an AC is going, the air is so cool...whatever odor problems are reduced, much like an apple going bad in the fridge.
I fired up the furnace and am getting the unmistakeable chemical smell most of you can recognize instantly as the fiberglass material that makes up plenum boards. Believe me, it can't be mistaken for oil on a new coil assembly.
The pic below will serve as some kind of reference.
Right above the coil unit is a plenum. When I press on it...it sounds like
galvanized plenum. They wrapped it in what you see.
There were a number of minor air leaks outside that wrap that you could feel. No problem...just few pieces of tape here and there. No biggie at all.
I believe that somehow, when the hot air is running up that plenum...it's catching the back side of the plenum wrap and is somehow transporting the
unmistakeble smell of fiberglass-chemical smell thru the ducts.
Anyways...I was hoping someone here has actually taken a good smell of
plenum board fiberglass...I have ziplocked a piece for my installer company to compare when furnace exaggerates it. It's an unmistakeable smell.
They may have to yank the furnace out to correct the problem. For a good company...is that a big deal?
1. Can anyone relate to that chemical fiberglass smell? I am getting to be a pro at it and I'm no HVAC guy.
2. The plenum off the coil unit seems to be metal, but why can I be feeiling air from minor tears from the wrap? (dings happen, tape is fine).
Could this be where hot air during furnace runnning is heating up the backside of the fiberglass silver wrap and thus causing that chemical smell?
I added some DynaMat, but it doesn't even get luke warm before I start smelling chemical fiberglass smell, so plz don't bring that up. Dynamat is
totally neutral smelling, even if put on a spoon and heated like a junkie.
OF course your not going to smell this problem with 54.5 F air. OR even with Fan On.
Send thru 119 F hot air...and ohhhh baby. Something in the install went wrong just above the coil unit...that's my guess. Otherwise they did a neat job. P.S. it was a new install replacement on existing plenum. Also, notice the tape at ceiling. I felt cool air being wasted there until they taped it. I have a feeling someone of you know exactly whats going on with this situation. Some type of coil unit to plenum install problem with hot air heating up fiberglass wrap. Guys..that smell is so unmistakeable, (I'm guessing).