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What's this?

To me it sounds like condensation NOT being pulled out of the air properly.

First off, I'm certainly no expert, but I do work in commercial construction with a lot of people who know their stuff when it comes to HVAC. Based on my understanding, when the supply air leaves the air handler, it should have been thoroughly de-humidified if the system is functioning/sized properly. In my opinion, it sounds like you have humid air flowing through your flex ductwork and it is condensing on the inner lining of the ductwork and collecting at the lowest points.

Is your crawl space nice and cool?

(In response to this post by MrBayAreaHokie)

Posted: 09/12/2019 at 3:57PM

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Current Thread:

Question for you HVAC experts -- MrBayAreaHokie 09/12/2019 3:48PM

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Here you go. Read response #6 -- Stork 09/12/2019 4:19PM

Thank you Stork ** -- MrBayAreaHokie 09/12/2019 4:28PM

That probably makes more sense than my explanation... -- MP4VT2004 09/12/2019 4:25PM

I've dealt with engineer reports involving moisture in crawlspaces and I'm -- Stork 09/12/2019 4:27PM

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Is the duct insulated or the underside of the subfloor? ** -- Stork 09/12/2019 4:20PM

It's insulated duct. silver on the outside, pink on the inside ** -- MrBayAreaHokie 09/12/2019 4:23PM

Mouse pee most likely ** -- Brown Water 09/12/2019 4:00PM

To me it sounds like condensation NOT being pulled out of the air properly. -- MP4VT2004 09/12/2019 3:57PM

Yes, the crawl space is very cool...it's like an old castle, probably 50F ** -- MrBayAreaHokie 09/12/2019 4:04PM

That would make sense...the crawl space temp. is probably cooler than... -- MP4VT2004 09/12/2019 4:11PM

Rock on MP4..thank you ** -- MrBayAreaHokie 09/12/2019 4:20PM

You're welcome! Good luck...hopefully it's something simple. ** -- MP4VT2004 09/12/2019 4:22PM