In the next year or two I will be building a new garage/workshop. I'm probably looking at somewhere around 1200 square feet. Does anyone have any thoughts on heating this? When not in use, I would like to keep the temps around 40 degrees and then be able to bring it up to temp when I'm working out there. Ideally, I would install a wood boiler and run in-floor heat, but my insurance company will not let me run a wood stove/boiler in a garage or out-building. The town that I live in also will not let me install an OWB.