Hydronic in-slab heat for basement
I’m remodeling a 1700 sq ft basement under a single story 1959 ranch house in Nashville, TN (zone 4). The slab was so poorly done that we decided to cut it up and re-pour. This will give us 4-5 extra inches of basement headroom, around 7’11”.
I’m planning to install hydronic in-slab heat for the entire basement. There is already an HVAC system for the main floor and the duct work is in the basement. I think a few registers will handle cooling in the basement in the summer. I assume we can always close off the vents in the basement in the summer if it gets too cool.
I assume the hydronic in-slab heat will handle basement heating in the winter and we won’t need a split system. I like the idea of having in-slab heat. I know it won’t feel warm to the touch, but I assume the floors will be much more comfortable than they would have been otherwise.
I have two questions:
1. Am I overlooking anything with this approach?
2. If we had to choose between 1″ EPS under the slab or 2″ EPS but with 1″ less headroom in the basement, would it be okay to use 1″ EPS? The basement is walk-out for about 30 ft on one end of the house. The rest is below grade (grade ranges from 6-8′ above the slab around the rest of the house).
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