ANY SUGGESTIONS TO HEAT UP MY BRAND NEW 26 X 36 X 10FT HI, CONCRETE FLOOR, INSULATED WALLS, POLE BARN? I WOULD LIKE TO GO WITH PROPANE FOR THE HEAT SOURCE & SOME KIND OF CEILING HUNG UNIT. (WHAT A NICE XMAS PRESENT FOR MY WIFE!! NO REALLY...SHE FINALLY GETS TO PARK HER CAR IN THE ATTACHED GARAGE AFTER ALL THOSE YEARS!!)