A heating device having a burn chamber that includes at least one opening, a conduction chamber adjacent to the burn chamber and including at least one aperture, a heat manifold including a first port and a second port, and at least one source vent extending between and coupling the first port of the heat manifold to the at least one opening of the burn chamber, and at least one exhaust vent, protruding from a surface of the heat manifold and extending between and coupling the second port of the heat manifold to the at least one aperture of the conduction chamber.

The present invention generally provides an improvement upon existing wood-gas stoves, in which the invention makes it possible for a user to start the fire in a well-ventilated single-walled stove configuration, and then easily and instantly convert the stove into a double-walled wood-gas stove configuration for improved start-up and boil times as well as increased fuel efficiency of the stove and reduced smoke particulates emanating therefrom. The invention also improves air flow and pyrolysis efficiency by elevating the canisters above the surface below, allowing less restricted air flow from underneath and a greater distance and time for gas to heat up between the canister walls.