Nate Perkins writes:

I've been thinking of getting the HVAC company out to install a gas-
fired system for the garage, the kind with the flame stream separate
from the shop environment. But I think it's going to be kind of steep,
I guess around a grand or so.

I doubt you'll get a condensing furnace installed for $1000. Labor is a
good chunk of the cost. Does your shop even have propane or natural gas
piped to it?

Brian Elfert