This is a forced-air (convection) heater—a strong fan ... The latter is to prevent the type of fireball that can result if propane gas is in the combustion chamber before it ignites.

they most commonly burn natural gas or liquid propane gas (LPG). If you own a gas-burning forced-air furnace or are thinking of buying one, understanding how they work is an important first step.

If you plan to spend time in your garage this winter tackling projects at your workbench, raising the ambient air ... Propane heaters are more portable, and can cover more surface area. Natural ...