Provided is an air cooled combustion furnace system to effectively operate a combustion furnace for generation of heat energy via combustion of a solid fuel so as to optimize thermal efficiency. The combustion furnace system includes a combustion body structure provided with a hopper and having a combustion space for production of heat energy via combustion of a solid fuel, a cooling device integrally formed in multiple layers with the combustion body structure to cool the combustion body structure via distribution of air, a negative pressure induction device to create a negative pressure within the combustion body structure by suctioning air, a fuel supply device, a grate device constructed by coupling a plurality of grate segments to one another and serving to support the solid fuel being combusted, and a clinker removal device to remove clinkers generated during combustion of the solid fuel from the grate device.

The heater assembly includes a case having a heating element therein, a channel extending through the case and having a size and shape for selectively receiving therethrough a first end of an elastomeric fixture outstretched through a substrate to a first length having a first width, and a heat transfer surface positioned relative to the heating element for receiving generated heat therefrom. The heat transfer surface is generally positionable relative to the substrate to cooperate with an adhesively bondable attachment coupled to a second end of the elastomeric fixture opposite the first end and including an uncured bonding agent disposed thereon. The heater assembly and attachment simultaneously sandwich the substrate in compression engagement in between when the elastomeric fixture extends through the substrate into the central channel and relaxes to a second relatively shorter length having a second relatively larger width.

The heater assembly includes a case having a heating element therein, a channel extending through the case and having a size and shape for selectively receiving therethrough a first end of an elastomeric fixture outstretched through a substrate to a first length having a first width, and a heat transfer surface positioned relative to the heating element for receiving generated heat therefrom. The heat transfer surface is generally positionable relative to the substrate to cooperate with an adhesively bondable attachment coupled to a second end of the elastomeric fixture opposite the first end and including an uncured bonding agent disposed thereon. The heater assembly and attachment simultaneously sandwich the substrate in compression engagement in between when the elastomeric fixture extends through the substrate into the central channel and relaxes to a second relatively shorter length having a second relatively larger width.

Disclosed is a combustion apparatus for both firewood and pellet fuel comprising: a combustion chamber in which wood fuel including firewood or a pellet is stacked; an air supply unit provided with an air supply pipe and a gap-maintaining member and including a nozzle connected to the air supply pipe and configured to spray air toward the wood fuel in a side direction thereof; and an operating unit configured to force the gap-maintaining member to come into contact with one side of the wood fuel to continuously maintain a constant gap between the nozzle and the wood fuel during combustion.

The present disclosure provides woodstoves that, optionally, produce low emissions. In certain embodiments, the woodstove includes a housing, a firebox disposed in the housing, an air regulator and a secondary air pipe. The air regulator includes a primary air aperture configured to supply primary air to a fire located in the firebox, a plurality of secondary air apertures configured to supply secondary air to a combustible gas emitted by the fire, and a secondary air damper. The present disclosure also provides methods of operating such a woodstove. As measured according to Method 28 of the U.S. Environmental Protection Agency, the weighted average emission rate of the woodstove of certain embodiments of the invention is no greater than about 4.5 grams of particulate emissions per hour.

Embodiments of a cooking station for cooking a food product are provided. In one embodiment, the cooking station includes a main body and an insert. The main body includes a vertically extending wall extending between a closed bottom end and a closable upper end with a lid. The main body is configured to extend longitudinally in a vertical orientation. The main body defines a lower insert opening and an upper insert opening, the main body including a slideable door moveable to close-off either the lower and upper insert openings. The insert is sized and configured to be removably positioned through either one of the lower insert opening and the upper insert opening, the first insert having heating element container structure configured to deliver heat to the food product.