Outdoor Wood Furnace Info
All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: bucky1399 on January 16, 2015, 08:40:15 PM
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Is anyone using a water to water heat exchanger and running a closed loop to heat there garage? I was thinking I would run the line into the garage in one loop, coming off the return line. But perhaps I could put in a heat exchanger and a small circulating pump on the garage line. Advantage would be I could put antifreeze in that line and only run it when I have projects going on. I'm looking at using a 50k btu heater in the garage. Or maybe with a small heater this size the amount of extra wood burned using an open loop would be negligible? Probably in the garage working on projects a couple days a week. Any suggestions?
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If it a true closed loop be sure to use an expansion tank and relief valve
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I have a separate loop going to my garage, and what I did is put my exchanger just off of the floor on the back wall, as heat rises and I like having my pump inside, but needs to be below the boiler water level. I used a recycled large hydraulic cooler that has 2 fans on it. My Grundfos pump is in the garage and wired to a box that has a switch to turn the pump on and off as well as a duplex outlet that I am controlling with a Honeywell 110v thermostat that I bought on E-Bay. The thermostat controls the outlets and both fans have separate plugs, so I can leave one plugged in, or both if needed, or unplug both fans which means the hot water is flowing through my exchanger, but I am taking very little heat from the water with no worries about freezing. This has worked very well for me. I do have a bypass loop that I put in the 1" copper if I need to service the exchanger.