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Author Topic: Closed garage heater loop  (Read 3084 times)

bucky1399

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Closed garage heater loop
« on: January 16, 2015, 08:40:15 PM »
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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slimjim

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Re: Closed garage heater loop
« Reply #1 on: January 17, 2015, 02:33:53 AM »
 If it a true closed loop be sure to use an expansion tank and relief valve
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U.P. Doug

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Re: Closed garage heater loop
« Reply #2 on: January 18, 2015, 07:55:26 AM »
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.
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