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Heating the shop for winter question

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Forum topic by UpstateNYdude posted 12-02-2015 03:34 PM 991 views 0 times favorited 42 replies Add to Favorites Watch
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UpstateNYdude

694 posts in 1444 days


12-02-2015 03:34 PM

So I have fairly large garage 24×32 and its walls are insulated not the ceiling yet as I haven’t had the time. I’m looking at purchasing a heater temporarily until next year when I get my NG Modine Hot Dawg heater installed. I’m looking at the Mr. Heater 30,000 BTU Propane Vent Free heater and wondering if this will suffice I have two 20lbs tanks and I usually only get 2-3 hours at night on the weekdays and 5-6 on the weekends.

Is this a good heater that won’t eat through a 20lb tank in a week? Do these off gas any moisture to the air that will rust my cast iron surfaces?

This is what I’m looking at

http://www.ruralking.com/mr-heater-30-000-btu-propane-blue-flame-vent-free-heater

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG


42 replies so far

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UpstateNYdude

694 posts in 1444 days


#1 posted 12-02-2015 03:37 PM

Confusing it reads like you need a 100lb tank, but then has acceptance for 20lb weird.

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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BinghamtonEd

2281 posts in 1830 days


#2 posted 12-02-2015 03:47 PM

According to the Q&A on the link you posted, the admin states that the tank will use 1.38lbs/hr on a medium setting. So, around 14 hours per 20# cylinder on medium. Sounds like with your usage, you’ll eat through that tank in a week, assuming you start it up a bit before you begin working, and maybe shut it off a bit before you’re done. They also say in the Q&A not to use anything less than 100lb, but not sure why that is.

-- - The mightiest oak in the forest is just a little nut that held its ground.

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Fred Hargis

3928 posts in 1954 days


#3 posted 12-02-2015 03:53 PM

I had one in my last garage. It was 26×22, insulated walls and ceiling, but no vapor barrier anywhere. I install;ed the heater and ran it one day. I happened to go up into the attic the next day only to see water dripping from the deck of the roof. They give off a lot of moisture, I disconnected mine that day, removed it and gave tit to a Goodwill store. As for the 20# tank, remember that’s less than 5 gallons. So, 95K BTU per gallon, each gallon will allow the heater to burn about 3 hours…or 15 hours of burn time roughly. It won’t be running all the time (I wouldn’t think), but that might give you some idea. If it were me, I think I would look into some small electric heaters but that’s juts my approach.

-- Our village hasn't lost it's idiot, he was elected to congress.

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summerfi

3315 posts in 1148 days


#4 posted 12-02-2015 03:59 PM

My shop is exactly the same size as yours, but the ceiling is insulated. I use a 45K BTU vented natural gas heater and it works fine. I think the 30K would be a little on the small side, and I would definitely be concerned about the moisture a non-vented heater would put in a shop full of metal tools. If it’s only temporary, you might get by with it. I supplement my heat with this, and on sunny days I never have to turn my gas heater on, no matter how cold it is. It works amazingly well.

-- Bob, Missoula, MT -- Rocky Mountain Saw Works http://www.rmsaws.com/p/about-us.html

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UpstateNYdude

694 posts in 1444 days


#5 posted 12-02-2015 04:14 PM

Would the type of heater matter for the moisture, does the convection produce more then the infrared model? Is one worse than the other for a woodshop?

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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WoodNSawdust

1417 posts in 637 days


#6 posted 12-02-2015 04:38 PM

This type of heater (non-vented) will dump the fumes back into the room. Including the Carbon Monoxide. This is not safe to breath!

I would suggest that you bite the bullet and buy the permanent heater now instead of risking your health for a year.

-- "I love it when a plan comes together" John "Hannibal" Smith

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Fred Hargis

3928 posts in 1954 days


#7 posted 12-02-2015 04:53 PM



Would the type of heater matter for the moisture, does the convection produce more then the infrared model? Is one worse than the other for a woodshop?

- UpstateNYdude

Not in my experience, they both put out enough to be a problem.

-- Our village hasn't lost it's idiot, he was elected to congress.

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johnstoneb

2143 posts in 1633 days


#8 posted 12-02-2015 05:01 PM

One of the byproducts of combustion is water. You need an externally vented heater to keep from breathing the combustion gases (one of which is carbon monoxide) and water vapor/

-- Bruce, Boise, ID

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UpstateNYdude

694 posts in 1444 days


#9 posted 12-02-2015 05:14 PM

Well unfortunately I don’t have the time and daylight to dig trench for a gas line running to my garage and bore through my foundation to get it there. So that is not a possibility until spring, I need something that can heat the space that doesn’t require gas to install and isn’t over $300 if possible.

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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jkinoh

74 posts in 1358 days


#10 posted 12-02-2015 05:23 PM

I’d make the time to insulate ceiling first, then figure what heat source you want.

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UpstateNYdude

694 posts in 1444 days


#11 posted 12-02-2015 05:34 PM

This is a TEMPORARY solution, I know I need to insulate I’m not installing it until I finish the wiring for the new heater which I can’t dig trench for until spring.

All I need are heaters that will make it warm enough so I can feel my face after 20 minutes when it gets cold outside for the next 5-6 months (YAY NE NY winters last forever), that won’t rust my tools, cause a fire or kill me lol.

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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bondogaposis

4024 posts in 1812 days


#12 posted 12-02-2015 05:39 PM

Here is a link to a BTU calculator that you can use to figure what size heater you need. But first insulate your ceiling or you’ll be just wasting your money.

-- Bondo Gaposis

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Rick M

7909 posts in 1841 days


#13 posted 12-02-2015 05:46 PM

For temporary I would just get an IR heater.

-- http://thewoodknack.blogspot.com/

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TinWhiskers

179 posts in 413 days


#14 posted 12-02-2015 05:56 PM


This is a TEMPORARY solution, I know I need to insulate I m not installing it until I finish the wiring for the new heater which I can t dig trench for until spring.

- UpstateNYdude

You have power in your garage? Why a trench? My 35k BTU Hot Dawg is on a 20 A circuit. If I had to I could run it off an outlet. 24×36 shop.

Really beware of old borrowed heaters. I borrowed a heater once, must have been 50K. Really put out the heat. Went to use a handheld propane torch and it wouldn’t light. Happened to have another on the bench. That wouldn’t light either. OUT went the borrowed heater. I have a carbon monoxide detector in my shop too.

If you want to go from outside temp to 50 it would take forever with a 30K BTU. How about 50K?

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UpstateNYdude

694 posts in 1444 days


#15 posted 12-02-2015 05:59 PM

What about something like this I already have the plug required or is this dangerous for fine dust and the like catching fire?

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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