These little heaters are a stop gap, add on. Well planned garage build shouldnt need them, or if you want to go electric a bigger unit with dedicated line would be best. My shop uses a nat gas downdraft house furnace, properly sized. I chose the little electric for my home garage instead of an overhead gas unit I already own. Gas line, exhaust was $500 in materials, before roof work, then tear out basement ceiling to get a gas line to the garage. For $100 or so I can heat the well insulated home garage pretty well, its not perfect.