Posted 7/12/2020 21:22 (#8370226 - in reply to #8370204) Subject: RE: Garage heat
Pontiac, IL.
I have a 28'x36' with a floor drain and in floor heat. 30 years and have never seen a need for heat ex changer. Use only a 40 gallon gas water heater for floor heat. This water heater is used ONLY for garage floor heat. If building today, would do the same.