I get temps of 30 below here in the winter time. Best advice I ever got on this board was from Brevik. Run heavy duty electrical cords to the portable heaters. The expensvie kind. Also have a little fan in the back and angle at the wall. The fan will circulate and keep the whole back end warm. It would be better to have a shop I know but I dont. So take this advice and thank Brevik.
Golden Boy
Golden Boy