Is heating a lower level partially exposed garage with radiant a smart way to go. Or would a gas fired modine be a better option? The garage is going to be used as a shop, and I am putting a thin slab above the garage for heating the living space with pex and and NTI condensing boiler. Any ideas or opinions.
I would look at a fan coil designed for low temps.
If you generally keep your slab at a steady temp, and you insulate the garage well, the radiant will work well. If you like to keep it cooler when unused, look at a fan coil.