Made this out of an old chest freezer.
One 4500 watt heating element heats it from 52 to 90 degrees in two hours. It will stay within 10 degrees of that for three or four days, with the shop temp at 47 when not in use.
The light on the door even still works when you open it.
Pump is mounted underneath where the compessor use to be.
The base is heavy i beam welded together, with casters on the corners.
I added adjustable legs on one end to level it out, and stop it from rolling.