I was always wondering about a DIY version of this until I finally see this type of setup. Has anyone used or install it in person? Supposedly a non floorboard solution and you can use it with a boiler or domestic water heater and set it to lower temp than combustion. What kind of license do you need to install (since you are dealing with non combustion and non refrigerant, a plumber?)
Actually I was thinking, if I can get my hands on these water to air heat exchanger (selling for $120-150 new with potable rating) and mount it to a recirculation pump (the one for faucet water in the morning), then a incubator thermostat to turn on and off the pump and blower fan, you can actually run it at a very comfortable temperature all day using your water heater (say you have a 90+ high efficiency one).
Actually I was thinking, if I can get my hands on these water to air heat exchanger (selling for $120-150 new with potable rating) and mount it to a recirculation pump (the one for faucet water in the morning), then a incubator thermostat to turn on and off the pump and blower fan, you can actually run it at a very comfortable temperature all day using your water heater (say you have a 90+ high efficiency one).