re: HVAC experts: anything wrong with this unit?

Napoleon,

What are your thoughts on whole house dehumidifiers?

If you build, get foam.

Even if you have to sell a kidney.


If you'd ever make an OT exception and fix my icemaker, I'll take you into my attic. It is dam near the same temp as the rest of the house.

OK man, after being called a dumbass practically for what I said earlier by several in this thread, I consulted with my Dad on your situation to see exactly what he said.

He said first, this is where you're losing the excess. He said to take some water-based duct mastic and go over all of the seams and potential leak areas and plug the hole where you can feel cold air. He said your "duct is f***ed" and he would replace it if it were him. He said if not, it wont reach max efficiency as it stands currently.

To those who refuted what I said earlier, he just laughed at y'all. He said "of course you can achieve more than a 30 degree difference, but at that point it becomes refrigeration and not air conditioning. The only way that is possible is if the unit is grossly oversized relative to the cooling area within the house. If the unit fits the house, then 30 degrees should be the max differential between outside and inside air. Of course, it all depends on your envelope." (which I guess means setup)

He said a whole bunch of other technical shite that I had a hard time following but that was the gist of it.

ETA: Take that for what it is worth, OP. There are obviously several HVAC contractors in this thread so advice from them may be better.

I think what most fail to realize is that when you have high relative humidity that your unit has to do extra work to pull the moisture out of the air while removing the heat from the air at the same time.

And just using an oversize unit wont work either, as it will just cycle and not remove the moisture.

Most newer units in the south shuold have a dehumidifier before the evap coil.

Napoleon, What company did you use for the insulation in your attic. Thanks

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Damn right! That's what we want

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Touche'

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Oversizing is as bad as under sizing, as you know

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Absolutely

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I wasn't calling you or your Dad out and in fact, I think we pretty much agree

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Oh I know, man, its all good. I just wanted to check with him and make sure what I was saying was factually correct. I typically don't post about something like this if I don't know what the hell I'm talking about. Hope it helps the OP because according to the old man, his setup is in pretty bad shape.