With the Direct vs. Indirect Chart, it's easy to see that Direct Fire will give you a much better painting environment.

There are two simple reason for this:

1. Direct Fire heats the air, while indirect fire heats a large metal barrel.
2. Direct Fire modulates, while indirect fire doesn't.

The test shown uses two older booths currently in operation. Both were originally indirect fire, but one was converted to Direct Fire by Downdraft Systems.

The ambient outside temperature was 38 degrees during both tests.