bare with me : first time :my project is putting a 30x38 garage onto my 1200sf house using the ashley w/domestic hot water att. pushing 80-90* of heat into house. (call me crazy) but has anybody tried using the hot water to warm up the concrete floor. i'am not thinking of 70-80* but to just take the chill off. it gets chilly in jan. (from northeast nebraska) would like to here everybodys comments. don't want this thing blowing up in my face Thanks