Don't really know a whole lot about it, it's a 60,000 btu forced air electric furnace, has a A-coil installed in it for the ac. He will be putting the central air unit soon also.
I'm sure being electric it won't be the cheapest thing to run, but sure beats not having heat in the booth. I'm actually surprised at how much heat it puts out for what it is. Seems to work great for the booth so far, I can turn the heat down in the rest of the shop and come in in the morning and the booth is still 70.
Before I had to set the heat way up and set a house fan in the filter opening to circulate heat, and it was a struggle to keep the heat up. So i guess when you look at it that way, my heat bill will probably go down over all.
The A/C setup should be pretty efficient. I was planning on doing something next year, was going to get a 220 window unit but I think this will be much better than that.
As far as cost, have no idea, this guy works at a heating and cooling place, this one was damaged in shipping, had some sheet metal damage and they couldn't use it, so he brought it over in exchange for painting the jambs on his car. Eventually he is doing the whole car, but this will get him closer.
I should research what it is so i know where to get parts and such, but being new I should be good for a while.