Radiant Heat in Low Heat Loss Basement

Bronsky

Can we get the full benefit of radiant heat installed in a new basement slab with insulation under the concrete, external insulation on the foundation walls to the floor, R-15 on the interior walls? Overall heat loss is 5.18 BTU/Ft. Basement space will have heating and cooling through ducts. Thermostat setpoint will be 70°F. Will a 3-4°F floor temp rise exceed the room loss? TIA for your input.

Hot_water_fan

You’re on it: at 5 Btu/sqft you’re looking at about a 72 degree floor on the coldest day. In all likelihood, the heat loss might be even less and the floor will be off most of the winter 

hot_rod

If by full benefits you mean warm floors, the answer is no

Radiant ceilings, walls or panel radiators are options