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here i am
 Originally Posted by richmod
My plenum is sheet metal and is NOT insulated - should it be? Only the ductwork is insulated.
the plenum is located in non-conditioned space it has to be insulated
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 Originally Posted by cnpro18
What is the temp. diff between the supply and the return. Coil could be too cold.
The dude has a uninsulated plenum in a crawl, its gonna sweat regardless of coil temp.
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 Originally Posted by cnpro18
What is the temp. diff between the supply and the return. Coil could be too cold.
Don't know - how would I measure it?
Of coil is too cold, can that be adjusted on the AHU?
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 Originally Posted by thandar56
the plenum is located in non-conditioned space it has to be insulated
Is that a requirement? If so, I'll be sure to advise the tech as such.
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 Originally Posted by richmod
Don't know - how would I measure it?
Of coil is too cold, can that be adjusted on the AHU?
You would need to call a tech to come check it out.
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 Originally Posted by cnpro18
You would need to call a tech to come check it out.
If its cooling fine, chances are he's got a humid crawl.
And yes , it probably is a duct lined plenum with a few air leaks.
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 Originally Posted by cnpro18
Any uninsulated plenum in a non conditioned space is going to be creating a small flood, not just a little condensation.
It's not just a little condensation - the whole plenum is covered with condensation, and there is actually a small pool of water under it now, though not a flood.
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 Originally Posted by superd77
If its cooling fine, chances are he's got a humid crawl.
And yes , it probably is a duct lined plenum with a few air leaks.
I'm in North Carolina, so yep - pretty humid down there right now. And yes - it is duct lined - 2 zone ducts, bypass duct, and return duct.
Tech's coming next week - thanks for all the info and opinions.
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 Originally Posted by richmod
I'm in North Carolina, so yep - pretty humid down there right now. And yes - it is duct lined - 2 zone ducts, bypass duct, and return duct.
Tech's coming next week - thanks for all the info and opinions.
Dude, you are totally welcome!!
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Original Poster
My plenum is in the attic. It is insulated in the inside with insulation. I don't notice condensation all the time, just some times. Should I be concerned or does this just happen sometimes?
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