Anyone using a small furnace in a single stall garage/shop?

Discussion in 'The Garage' started by markk53, Sep 11, 2017.

  1. markk53

    markk53 jack of all trades...

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    That's not hi-jacking. Just adding to the content and questions. I'm looking for 24/7 temps in the 50s in cold weather, not shutting down when not in the building. A bit different.
    #21
  2. 3shot

    3shot Been here awhile

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    first thing I'd do is figure how many BTU's you need then go a little bigger. there is calculators online
    #22
  3. 250bultaco

    250bultaco Adventurer

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    Mark
    Turns out mine's a Modine (Hot Dawg) 30,000 btu unit. About $600 online.
    I just texted you pics of it and the spec label, along with rough dimensions.
    KK
    #23
  4. jb882

    jb882 13HP of fury.

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    I have one like the one in the pic below in my 20x24 shop/garage and it works great, it fits between two studs so it takes up no floorspace. Mine is an older Dayton in 40KBTU. This Williams is virtually identical and i have used their parts to rehab mine over the years since Dayton no longer supports these. Mine is like 30 years old now. Its a "counterflow" with the heat coming from the bottom. The exhaust is outside and it also gets the combustion air from outdoors too, the combustion chamber is sealed. Mine runs off propane and i have 4 100lb tanks with an automatic switchover valve attached to it, the tanks are setup in pairs. I get an entire winter out of the 4 tanks running it when im out there working which is a fair bit, at least 3 nights a week. I fill them in the summer when propane is at its cheapest and i normally dont ever actually run out before its time to shut the tanks for the year.

    https://www.ecomfort.com/Williams-4007731/p71202.html
    [​IMG]
    #24
    John Smallberries likes this.
  5. Beezer

    Beezer Long timer

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    the down side to wood heat is that its only on when you are there to feed it. if you are there every day, no problem. I lived in semi off the grid, wood heat only for years... the Monitor oil heater changed that. feeding a wood stove is work, even if you buy firewood
    #25
  6. trailer Rails

    trailer Rails Washes hands before going to the bathroom

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    Pellet stove?

    Propane or nat gas are probably the easiest.
    #26
  7. Beezer

    Beezer Long timer

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    cheaper too
    #27
  8. John Smallberries

    John Smallberries Long timer

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    I'm up north from you near Ann Arbor, Michigan (Go Blue!) I installed this Hot Dawg 30,000 BTU propane unit for my 1-car moto man cave. I insulated the walls with fiberglass and put 1" styrofoam insulation on the ceiling. The Hot Dawg keeps the place a comfortable 70 degrees even on the coldest day last winter. Contrary to the photo, I now store the propane outside on a small covered rack. The ceiling insulation blocked much of the airflow going up to the attic vents. As a result, it can get very damp in there. I added a dehumidifier and all is good now.

    The fan noise is not too bad. I'm adding on to the garage now and think I will try a ceiling-mounted tube radiant heater as it may be quieter.
    [​IMG]

    PS: I ordered mine from QC Supply for $575. I later saw a similar-size unit on sale at Menards for ~$350.
    #28
  9. markk53

    markk53 jack of all trades...

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    Do you run the furnace 24/7 at low temp? If so, how long does the small tank last?
    #29
  10. John Smallberries

    John Smallberries Long timer

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    We only run it when we are actually in the shop - not 24/7. The area is so small that it heats up within 20 minutes, or so. I think I made three trips to the local propane source to refill one of the 40 lb. tanks. I'd guess each tank heats the space for around 12 hours. If I were using the garage for 8 hours each day, the 40 lb tank process would be unmanageable. With casual hobby use, it works fine.
    #30