Insulation done! Shop heater questions. Electrical gurus.

I use a 4500 watt electric forced air unit to heat the shop up pretty quickly, while I get the pellet stove going. The heater I use was purchased at Noland Company, it only runs on a thirty amp, two pole breaker and plugs into the same outlet style that I use for my mig welder. All I did different, was instead of using the base plate attachment for setting on the floor, I mounted it to the ceiling so as to be able to turn it towards where it's needed. The receptacle is mounted on the ceiling right beside the heater.