Radiant floor heat is definitely the best. I got estimates when I built my garage about 20 years ago. My garage is 24 X 32 X11 . Getting a boiler to do my garage and later room by room of the rest of the house would cost 10 grand then. And I'd only have the garage finished. So I went with the gas overhead radiant tube heater across the center of the garage. I had worked in body shops in the 70s and 80s that had them installed when I was working there. Such a huge improvement over the old forced air ceiling units and much safer for BS because there's no exposed flame. I payed $2,500 for mine, other than wishing I could have afforded the floor heat, I've never regretted what I bought. Ps. No problems at all after all these years.