
Well, we are in the dead of winter where I live. Outside temps of -16F at night with daytime highs of -1F. My unheated attached double-car garage is sitting at 26F, too cold for me to do any work out there.
When I first built this house, I had off-peak electricity in-floor slab heating in the house basement and the garage. Unfortunately, the wires were defective and burned out in less than 7 years. So much for the contractor stating that the floor heat would last a lifetime. It sure was nice when it worked, but those days are long gone.
Anyways, I have been looking into other options for heat in the garage in the winter. I would really like to go out there and tear apart some pallets or even maybe build something, like those new pallet wood raised beds I have on my list. I am trying to find out the relative costs of sources of heating to see what would be my best choice.
I looked into getting a large electric garage heater, but they require a 30- or 40-amp service line for installation. I only have a 20-amp line service to the garage, so that idea went nowhere.
I have a kerosene heater, a diesel heater, a propane heater, and smaller 120v electric heaters. I'm thinking my small 120v electric heaters would be too small to heat the garage, and too expensive on regular rate electricity. the kerosene heater would have to run a long time to heat up the garage, and where I live, kerosene is probably the most expensive choice. I have a super big torpedo diesel heater that would heat up the garage fast, but am not too sure if that would be a good idea to burn diesel inside an enclosed space. I have a smaller hot dog Mr. Buddy heater that runs of a BBQ propane tank. That is what I used last year and it worked OK, but propane tanks are pretty expensive.
I don't want to burn wood inside my attached garage because of the fire hazard. It's against code in town, but I don't live in town. Still, I am not considering that option. Although I often think that would be the best option because as I break down the pallets, I could be tossing in the broken bits and pieces of wood that I don't want to keep into the fire and heat up the garage while I work. Also, I don't think my insurance company would like it if I installed a burning barrel out in the attached garage. If anyone knows of a safe way to burn wood in an attached garage, please let me know.
I had a wall mounted ductless propane heater in my old garage, but those put too much moisture into the air from burning the gas and everything feels wet after a while. Worse yet, you will rust out your metal tools and such because of all the moisture in the air.
I do have an electrician coming out next week to see if he can salvage any of my old in-floor slab heating, or if he has any suggestions for extra garage heating. Like I said, the electric heaters I was looking at require 30-amp service at a minimum, and currently all I have is 20-amp lines.
If anyone has some suggestions for garage heating options that work for them, please let me know. I hate waiting until warmer `50F April temps before I can start working in the garage again. It gets to be a long winter....