Air-tight stove

Air-tight stove

The pentagonal self cleaning wood stove, is a EPA style secondary combustion air wood stove with a fan forced heat exchanger, thermostat, outside air intake with throttle, shakers, and ash drop for easy cleanup.

An air-tight stove is a wood-burning stove designed to burn solid fuel, traditionally wood, in a controlled fashion so as to provide for efficient and controlled fuel use, and the benefits of stable heating or cooking temperatures. They are made of sheet metal, consisting of a drum-like combustion chamber with airflow openings that can be open and shut, and a chimney of a metre or more length that turns from vertical to horizontal so as to leave the tent or building by a side wall rather than the roof.
These stoves are used most often to heat tents and buildings in winter. Wood or other fuel is put into the stove, lit, and then air flow is regulated to control the burn. The intake airflow is either at the level where fuel is added, or below it. The exhaust (smoke) from the stove is usually several metres above the combustion chamber.
Most modern air-tight stoves feature a damper at the stove's outlet that can be closed to force the exhaust through an after burner at the top of the stove, a heated chamber in which the combustion process continues. Some air-tight stoves feature a catalytic converter, a platinum grid placed at the stove outlet to burn remaining fuel that has not been combusted. (Gases burn at a much lower temperature in the presence of platinum.) ^{[7] [8]}
Using an air-tight stove initially requires leaving the damper and air vents open until a bed of coals has been formed. After that, the damper is closed and the air vent regulated to slow down the burning of the wood. A properly loaded and controlled air-tight stove will burn safely for eight hours or more without further attention.
These features provide a more complete combustion of wood and elimination of polluting combustion products. It also provides for regulation of the intensity of fire by limiting air flow, and for the fire to create a strong draught or draw up the chimney. This results in highly efficient fuel usage.
Air-tight stoves are a more sophisticated version of traditional wood burning rocket stoves. With the advent of new tent fabrics, they have fallen out of favour for tents because substituting nylon for canvas creates fire hazards.