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Garage Heater
Lakeman I have a 25'X 25' garage and a 15'X 15' workshop that I heat with propane plaque heaters that are mounted on the wall. They work great the are ventless. I bought them at Tractor supply and installed them myself. They work great they can raise the temp from 20 to 70 in under a hour. I would not use electric it is much more expensive and slower. The second floor of my garage is a playroom for the kids and has electric it does not heat up nearly as fast as the garage. You ca also buy a 100 gal tank at tcs one fill will usually last me the winter.
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Garage Heater
I am not sure what a propane plaque heater is. Sounds very interesting. I could hook it into my large propane tank thats on the home furnace. What is a brand name of one of them. I did a search on Propane Plaque Heaters and came up with nothing.
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Garage Heater
I think radiant heating can be applied to an existing slab but it would raise the floor level. The Library Board is doing some building right now. A new room in an existing slab on grade municipal recreation hall is being constructed. Supplemental heating is needed since the rec hall is kept cool when not in use and a radiant retrofit was discussed. Far as I know they are popular and efficient systems, but all bidders on the contract went with some variation of electrical. I think there'd be considerable problems in changing the floor levels and the idea may not work at all if the traffic were equipment rather than people.
The ventless propane systems sound interesting and I wasn't aware of them. I wonder how they get around the issue of low ventilation in very tight rooms and the possibility of producing CO if the oxygen supply became depleted--some sort of catalytic burner maybe. I wonder how much bang you'd get from a passive system such as skylights and a black floor?
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Garage Heater
Lakeman look on the tractor supply website (www.mytscstore.com) under home improvements then heating.They have several modals and sizes. I am very pleased with the 2 that I have they are a very easy and inexpensive way to heat an area.
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I also have a two car attached garage that is isulated. I installed a 30,000 BTU forced air propane heater that hangs from the ceiling. I'm very happy with it. It's fairly quiet and gives me all the heat I need.
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I'm building my house right now, and putting pex in the slab as mentioned in an earlier post. One really nice advantage of radiant heat, if setup right (besides a warm floor when you are under a tractor or car!) is that there is no open flame. You can work with epoxy, or perhaps give that small part a quick spray. In my dads house, he is installing a downdraft fan, and with the flameless radiant heat (assuming your heat sources is located elsewhere, and you are simply circulating hot water through the floor) he can paint cars all winter.
For those DIY, you can have a design done and a quote from www.radiantec.com, and they offer solar intertie kits too. I am currently deciding between these guys and a local guy who would supply a ground source heat pump.
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Huckmeat
Good handle!
Have you explored the solar aspect,with the pex in your slab?
Wondering what you thought,as I am in the planning stages of another house and found that(solar) appealing.
The price of oil and gas is so unstable for long term
planning.
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In our old house, we had a Rinnai ventless radiant heater. It heated our whole house and used 'very' little propane. This would be ideal for a garage also.
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grinder,
Yep! With propane and other fuel sources doing what they are, it's pretty easy to justify a little extra up front (roll it into the mortgage up front) for better heating costs.
I'm looking at the radian solar stuff (from the radian tech guys) - I'm in colorado, and with the sun we get, a well designed solar system, even just pre-heating a condensing variable flame boiler like a munchkin, would really cut heating costs.
I'm also getting a bid on Geothermal - I've got a guy here who will supply and install the ground loop and the ground source heat pump (which will also provide AC) as well as my radiant heat water and pre-heat domestic hot water. He will do the radiant design, the HVAC design, install the geothermal equipment and ground loop, and supply me with all the materials and a detailed design, along with a week of his lead technicians time. I do the install of the HVAC/radiant per his design, and I end up with a system that doesn't need any fossil fuels, other than the electricity. For electric, I'm going to put in the grid intertie, so that my surplus electricity is sold back when I'm not using it. A small array (2800W) ought to cover most of the heating costs, if not all. We get 300+ days per year of sun, so the solar hot water is still probably first on my list, and cheaper.
I think you can get quite a solar hot water system for 3-5k. That type of system would provide all domestic hot water, and probably a good portion of your heating costs. I'll post an update when I get more info.
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Huckmeat, what brand of geothermal heat pump are you looking at? I would recommend against WaterFurnace equipment - ours has been nothing but trouble and support is piss poor.
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08-13-2017, 02:05 
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