Originally Posted by beenthere
That would create a negative pressure in the occupied area. And pull in unconditioned air to that area. And raise humidity.
Good to know.
The radon mitigation contractor told me, a couple of days ago, if I seal the vents and add a humidifier, there would be no effect the radon system. It will work as before. So, I don't need to add any extra vacuum to the space above the poly.
I do wonder about air quality in a sealed crawl. Is there any air exchange? Will it get really stuffy or unhealthy for workers?
I have sealed a few vents and will finish the rest when the humidifier arrives.
I think I actually have two problems, after all. One is the excess humidity and the other really is a cat urine type smell. The more time I spend in the crawl, the more my nose tells me that the cat urine smell is a localized thing, in the corner near the crawl door.
Last weekend, I tried finding the urine crystals with a UV light - no luck.
Yesterday, I sprayed the whole area (about 15' x 15') with the enzyme/bacteria type urine smell remover. Haven't been back down yet to see if that helped.