Derek Cole explains why HVAC ducts get wet: usually crawlspace moisture or groundwater seeping in. Cleaning won't fix it. You need to replace the wet insulation, seal the crawlspace, and stop the moisture at the source, or the smell and damage will come back.
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We've been to some duct system recently that have been underwater or have had water in them. So first we need to. The problem. I've seen this problem a lot in H vac, especially in this tree, is people try to put Band Aids on the problem and don't try to fix the problem. Right. I mean, I go to the doctor. I want to be healed of the sickness. I don't want a medicine to mask over the symptoms of the sickness. Does that make sense? So I want to cure. I don't want the Band Aid. I want to stop bleeding. I want to cover it up. So we need to figure out why the water is getting in the duct to start with. It's probably because the crawl space is getting moisture coming from the ground and it's getting wet that way. But once that happens, that needs to be replaced. Once you get insulation wet, there is no drying. I mean, you can try to dry it, but it's not going to be completely the way it was. So you need to go back with a new duct system, a sealed duct system. And you need to handle the problem of actually the ductwork getting wet. Seal the crawl space, and then you need to replace that piece that is wet. Because wet insulation, first of all, stinks, and second of all, you don't know what is in the insulation.