Mikepier wrote:

Buying an electric heater upfront is inexpensive plus you don't have to
worry about venting issues, but operating costs will be expensive.

Gas heaters will be expensive upfront plus you will have to vent it to
the outside , but operating costs will be less than electric.

I had a gas wall furnace in my old condo that vented to the outside. It
did a pretty good job.
It was this one.
http://shoppingcart.msservicecompany...&itemid=sa25ng

That's basically what I need to add to my workshop for heating. The
ventless units are cheap and easy to find, but the massive amount of
moisture they dump in the room would destroy my tools in short order.
That's ignoring the issues with flammable solvents and dust as well.

Pete C.