I wish more would "get this" but it's always "the floor is poured" LOL. And you can use a floor coil with wood, as well. Friend of mine, now dead, had a floor coil, thorugh a coil in the wood heater, and then through a gas/ LPG water heater for backup. Worked REALLY well, and he rarely fired the gas heater. Thing is you don't need the shop "all that warm" with in floor heat.