Outdoor Wood Furnace Info
All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: 68bucks on March 31, 2020, 12:37:43 PM
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I'm looking at options for heating a work shop. Its 35'x40' with 12' ceilings, all insulated. I would like to have a heating system that is outside the building to avoid taking up floor space inside and I think my insurance company would like that. I have looked at boilers and forced air system. I don't plan to heat the building 24/7 only when I plan to be out there a while so this would be intermittent use I guess. So I'm interested in suggestions. Is an outdoor system a bad idea? I was thinking FA would heat up a lot quicker. A single supply duct and return duct with a simple grate on the wall where it comes through would probably suffice to heat it up pretty well.
I have considered a boiler but it would need antifreeze in the system. It would be easier to run a couple water lines through the wall to an exchanger and fan of some sort. I'm just not sure this is a good application for a boiler though. It would take longer to heat up I assume and I don't know how it would like the heating cycles over time. Any insights or ideas that you may have would be appreciated. Thanks
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Is the shop not close enough that you could heat your home as well?
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I don't now who all is making hot air outdoor furnaces anymore. Do your research, I haven't seen anyone on here that has been running one.
As marty suggested we do quite a few hooking up to a house and shop, only warming the shop up when you're actually working in it. An oversized blower heats up pretty quickly.
With a boiler antifreeze would depend on where you live. In the south you could probably let the pump run. Up north it's too risky. You'd want a boiler with really low water volume so it heats up quick, a C150 would be a possibility. It holds 60 or so gallons.
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US Stove makes one.
https://m.northerntool.com/shop/tools/product_200680239_200680239?cm_mmc=Google-pla&utm_source=Google_PLA&utm_medium=Heaters%20%26%20Stoves%20%2B%20Fireplaces%20%3E%20Wood%20Stoves&utm_campaign=US%20Stove%20Company&utm_content=58031&&lid=92700043522960668&ds_s_kwgid=58700000737318855&ds_e_product_group_id=660391070590&ds_e_product_store_id=&ds_e_ad_type=pla&ds_s_inventory_feed_id=97700000001662305&gclid=CjwKCAjw95D0BRBFEiwAcO1KDDKFWHeWRWg9_r5ZNOndBZdGKX_RdT9sSlIrW26FjfAOcK1JF-LBxxoCo34QAvD_BwE
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I'd love to heat the house with the same boiler but they are a good 350' apart. I'm in Northern Ohio so I'll have to have anti-freeze for sure. I have found a few hot air units including Air Stove made here in Ohio. I think I will eventually put a boiler on the house too but I just don't see where I can put a unit to service both buildings. What are your thoughts on heat cycling on these outdoor units especially boilers? How quickly do you think a low volume boiler would take to heat up enough to make good heat. It's not like I would need instant heat but I'd rather not wait 3 hours or something to get hot air. I do know it would be a lot easier to poke a couple of small pipes through the back wall than figure how to run a couple 12" ducts through the wall.