After many years of working in a cold unheated garage and out on the driveway in winter, I broke down and bought a heater.
A 55,000 btu kerosene forced air Reddy Heater.
The temp here today was 40 degrees outside and 54 in my garage.
My garage is 14’ x 24’ with a 12 foot ceiling, after only 15 minutes the temp in the garage was 70 degrees.
I have a vented hatch to my overhead for the garage so fumes are not an issue for me.
There really wasn’t a problem with fumes while the heater ran, just when starting and shut down.
The heater is much more than I need for inside, but will also suit me well when working on the drive in the cold.
Lowes has them now for $99.00 down from $199.00 (closeout).
Some of the best money I’ve spent in a while!