I say go for it! My sewing room in this house was the garage. The landlord turned it into a bedroom. It has an a/c unit in it and does have a heat duct, but doesn't work that well. The heat, that is. Anyway, I went and bought a little $25 heater that sits under my table and when it gets too chilly in the room, I just turn it on for a bit. Works like a champ!