I have a idea that I have been kicking around for some time now.
I'm going to take my work truck that I use most of the time driving 8 hours a day, and install a 50 gallon water heater tank in the back that's connected to the coolant system. I have noticed during freeway driving that the fuel mileage changes very little with this truck even when I have large loads (mixing equipment)
It will help me with two different things.
1) Keeping our water born automotive paints (Automotive Paint Jobber) warm during my 8 hour drive in route to deliver them. Has a canopy already.
2) At the end of the day hook it up to my garage (20' 6"W x 20' 6"L x 8' 6" tall) water radiator with a small fan to heat my garage.
If a third of the energy in a ICE is lost to cooling, I figured if i can store some of that energy in a 50 gallon water heater I can use it the rest of the night to warm my well insulated garage.
I'm thinking about a couple solar panels and a small wind generator to run the garage small pump for circulation and the garage fan???
I wish I would have installed a in ground concrete floor heating unit but its to late so it will have to be a air unit.
The truck and garage pics.
