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I have a regular wall mounted propane heater with thermostat on top

Mini split

Vevor propane forge.

I have a 26’x26’ garage with 10’ ceiling……I have a free-standing, ventless, 30K BTU propane stove that I hook up to an RV propane tank! iI also have a 22” box fan angled downward mounted near the ceiling of the garage. The fan helps move the heated air down from the ceiling area.

Just an FYI……4 years ago this month our forced-air furnace went out. Parts were over a week out. I brought that little heater into our house, hooked it to that RV tank and heated our house.

Wyoming gets a bit cool in January, that little heater kept our main level and the upstairs (2440 sq. ft) quite well. So good in fact, we bought a decorative “fake burning logs”, free standing, cast iron, 30 K BTU heater. It’s been our only heat source in our home since it’s purchase. The forced-air heater is now the back-up to the little propane heater! memtb

Propane fired salamander heater here. It’s adjustable and will put out 150k btu on high. It’s probably 20 years old now and I finally had to replace the regulator and thermocouple. Works great to get the chill out of the outside garage. The attached garage gets enough residual heat from the house.

Dewalt propane fired radiant 35,000 btu heater. Mounted on wheels, it projects radiant heat horizontally to your work area. Works great.

Also have a 40,000 btu kerosene torpedo heater. When using kerosene, the smell is tolerable, but with diesel fuel with the additives, the smell gets uncomfortable.

This is in a 36 x 48 x 14 uninsulated pole building. Just warming my work area to above freezing is nice. I do have an 8 x 12 insulated work room with electric heat for doing detailed work.

eventually that is what my goal is

I've been looking at the MrCool brand because you don't have to vacuum the system to set it up yourself.

Will probably go that route next summer.

Another Modine owner here. My workshop is 32x32 with 10 foot ceilings and insulated and sheet rocked. Within 10 minutes the temperature will go from 40 to high 50's. Never had any issues with the heater.

Last week I paid $7.99 for a gallon of kerosene. I hadn't bought any in a while, and I laughed because I thought the girl was kidding.

This is what I have and it works pretty good for what the OP described.

Portable heaters and wall mounted heaters fueled by oil or propane that are not vented to outside of the building will increase the moisture content of the air and can cause rust to form on steel tools and equipment.

Typically this is worse in small or uninsulated metal buildings. These unvented heaters are best used on a part time basis, rather than continous heating.