It was used all of the time in my area until the water table rose due to city growth causing poor watershed. They used metal. I would rather see something that won't rust away. Many of these did, but as I siad, the local climate changed and the ducts spent a lot of time wet. Most of these slab houses have now been converted to horizontal units in the attic a long with all of the ductwork.
Originally posted by ac4me
Does it make sense to blow air thru slab on grade to help cool the house?
Would I use metal ducts or will pvc work? I have a HVAC contractor designing the geo system, but just wanted to ask this. All the main ducts will be below ceiling in living space. Thanks for the input.
I live in Nashville TN. 3000 sq. ft.