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Best way to Heat un-insulated shop space?

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Best way to Heat un-insulated shop space?

Old 01-22-2019, 09:13 AM
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Default Best way to Heat un-insulated shop space?

400 square ft space. No insulation. Not adding insulation, it's not an option.

Ive got a big propane job site blower heater. It cranks, but I'm afraid I'm gonna keep over from carbon monoxide.

I've got a 110v plug in radiator style heater. Slow to warm up, doesn't really heat the space much at all. I've got several other small blower style space heaters, they don't do much. I've got another big electric blower style 110v that we used to use in our house too, haven't tried that.

There's a 220v electric plug in blower style on sale at northern tool for under $100. I can easily add a 220 plug for it, have room at the sub panel.

Is it worth buying yet another electric plug in?

Im not looking for shorts and a t shirt, but I would like to get from say 45 degrees to 60-65 degrees.

im not looking for long term heat, just a couple hours at a time.
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Old 01-22-2019, 09:18 AM
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Use a salamander heater to get it initially warmed then switch to a propane buddy heater near where you are working.
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Old 01-22-2019, 09:21 AM
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Space for a wood stove if it’s even practical?
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Old 01-22-2019, 09:28 AM
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220 volt space heaters work great.....https://www.northerntool.com/shop/to...5481_200395481
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Old 01-22-2019, 09:30 AM
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https://www.northerntool.com/shop/to...CABEgLZVfD_BwE
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Old 01-22-2019, 09:36 AM
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Originally Posted by northernoffshore View Post
220 volt space heaters work great.....https://www.northerntool.com/shop/to...5481_200395481
this is the one on sale for under $100 locally right now.

i just don't want a sixth space heater if it's not significantly better.
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Old 01-22-2019, 09:37 AM
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Originally Posted by GoneNdoneit View Post
Space for a wood stove if it’s even practical?
yes, but not practical in this scenario. Average worktime is 2-3 hours. Hobby shop, not a fulltime production shop.
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Old 01-22-2019, 09:38 AM
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I have a 40 amp higher CFM version of this. Go it on sale at Grainger for about this price

Brings my uninsulated garage from 25 to 55 in minutes. Had to run like a 6 guage (?) line-I forget.

https://www.globalindustrial.com/p/h...EaAhx_EALw_wcB
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Old 01-22-2019, 09:43 AM
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Move it to Florida.
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Old 01-22-2019, 09:44 AM
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Originally Posted by LI Sound Grunt View Post
I have a 40 amp higher CFM version of this. Go it on sale at Grainger for about this price

Brings my uninsulated garage from 25 to 55 in minutes. Had to run like a 6 guage (?) line-I forget.

https://www.globalindustrial.com/p/h...EaAhx_EALw_wcB
I've been looking for something to heat my 16x20 shed.
Thanks for posting this
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Old 01-22-2019, 09:46 AM
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Originally Posted by Double tyme View Post

this is the one on sale for under $100 locally right now.

i just don't want a sixth space heater if it's not significantly better.
works ten times better than any 110 style.. or radiator heat
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Old 01-22-2019, 09:47 AM
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Depending on your average outside temp, you're might need about 30,000 BTUs to keep that space warm. If you give up using on the colder days, then you could probably do with less. Either that radiant heater or the 240v heater could work. How 'tight' is the space? Do you get airflow from the outside that you have to heat too? Are combustibles a concern?

If you're burning anything though you might want to invest an extra $30 for a CO alarm - just in case.
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Old 01-22-2019, 09:48 AM
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Originally Posted by Double tyme View Post

this is the one on sale for under $100 locally right now.

i just don't want a sixth space heater if it's not significantly better.
Your 110v heaters are probably 5,000 BTU at best. That 220 model is 19,000+
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Old 01-22-2019, 09:54 AM
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Originally Posted by LI Sound Grunt View Post
I have a 40 amp higher CFM version of this. Go it on sale at Grainger for about this price

Brings my uninsulated garage from 25 to 55 in minutes. Had to run like a 6 guage (?) line-I forget.

https://www.globalindustrial.com/p/h...EaAhx_EALw_wcB
That's not a bad unit in the link! For those considering this, it would cost about $6 for each 8 hour period you would use it (the linked one, not the 40A version). Not bad if you just need it here and there but if you ran it every day it would be several hundred on the monthly electric bill.
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Old 01-22-2019, 09:59 AM
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I have a mini-split in a well insulated garage but I saw one recently where the guy had a 30,000 BTU wall mounted propane unit with a line run through the wall to a 60-80 gal? outside propane tank. Seemed to work really well when I was there for a couple hours in the cold.

https://www.northerntool.com/shop/to...IaAkt9EALw_wcB

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Old 01-22-2019, 10:17 AM
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Originally Posted by northernoffshore View Post
220 volt space heaters work great.....https://www.northerntool.com/shop/to...5481_200395481
THIS^.... I've got an older unit made by Farenhiet from northern in a 250sf well insulated garage and ints 68 in there and in the 20s outside here.
For your application I would use two , they are thermostat controlled but put them both on a switch (separately) for when you won't use it for a while and turn them off.
Have no idea how much it cost to run them and don't care . Wife pays the power bills and she's never mentioned anything about it .
So..I guess that bout wraps up this Thread. Let us know how it works out .
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Old 01-22-2019, 10:33 AM
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propane when burning properly does not give off very much carbon monoxide. pretty sure that is why inside forklifts run on propane vs gas or diesel.

so a propane heater that is designed for inside use would be fine!
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Old 01-22-2019, 10:57 AM
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kerosene residential heater (or 2), or a ceramic plate style LP unit. Definitely have a carbon monoxide detector in the space, and use a unit with a low oxygen shut off.
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Old 01-22-2019, 11:10 AM
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Go to your local hvac company and ask if you can have an old air handler that had a bad coil(dime a dozen) with electric heater. They are not worth anything but penny scrap to the contractor or the scrapper. Run a 240v circuit to the air handler and mount a cheap tstat. You now have a heating system that will keep you warm and than the fan only option during the warmer days to move some air around. It’s a cheap way to do what you are trying to do but it will work well.
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Old 01-22-2019, 11:10 AM
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I've been using kerosene heaters in closed spaces for years, campers, RV bedroom, etc. Little, if any, CO from a good one. Not planning to sleep in there, right?
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