WoodGas Automotive Brake Rotors used as hearth gm #55067
A Standard Mike LaRosa Rotor Gasser

Internet Troll Insist on Preheating the primary Air.
Here is my Design for preheating a Mike Larosa Gas Producer primary air.

How to Preheat Primary Air:
Using plumbing pipeing that passes thru the product gas stream.
Accumulate primary air heat from product gas.

Using Preheating Layered tubes.