I wouldn't think it was a good idea:
I think a Heat gun is more for a controlled amount of pinpointed heat, depending on the shield around the tip.
When I had my Cabinet Shop, I had an Edge Bander, with a Heat Gun built into it. The tip was shielded so the heat came out of a 1/2" X 2' space, so it was just enough to heat the glue on the edge banding.
And other Heat guns have a Tip used to heat things like "Frozen Pipes", and such, but I don't know of any of them being used to heat an area, like a Room or a Smoker Box. I don't think it would be very cost effective either.
Just My Thoughts,
Bear