I know this is an older post but I am really considering this type of setup. My question is...for the Air temp to be 80-85..... is the UTH giving off enough energy in the closed Tub to bring the air temp inside up to those levels? OR are you also keeping the tubs in rooms at the 80-85 temp range.
My home is usually 75degrees year round. I really dont think my family would like it if i made a room in the house 80-85 degrees in the summer lol.
Thanks