Waste Oil Furnace with a Brake Rotor Diffuser | Waste Oil Burner uses a forced draft blower with two 30 gal oil containers. It uses a brake rotor as a diffuser, which
1/2 Cups Brake drum pot belly heater build. | The Garage Journal
How to Build a Brake Drum Potbelly Heater for your Shed | Steel Sheds in Australia