A pellet stove having a combustion assembly housing. Located within the housing in a vertical array are a primary combustion chamber, a secondary combustion chamber located below the primary combustion chamber, and an ash receptacle located below the secondary combustion chamber. The primary combustion chamber communicates with the secondary combustion chamber, and the secondary combustion chamber communicates with the ash receptacle. A pellet feed housing is located above the primary combustion chamber and has a feed plate configured to feed pellets directly into the primary combustion chamber along an inclined path. Air intake ducts communicate ambient air with the interior of the housing. The primary combustion chamber communicates with a combustion gas conduit that conducts combustion gases along an upwardly extending tortuous path to an exhaust stack to provide heating. A pivotal, latchable door is attached to the front of the combustion assembly housing.

A pellet stove having a combustion assembly housing. Located within the housing in a vertical array are a primary combustion chamber, a secondary combustion chamber located below the primary combustion chamber, and an ash receptacle located below the secondary combustion chamber. The primary combustion chamber communicates with the secondary combustion chamber, and the secondary combustion chamber communicates with the ash receptacle. A pellet feed housing is located above the primary combustion chamber and has a feed plate configured to feed pellets directly into the primary combustion chamber along an inclined path. Air intake ducts communicate ambient air with the interior of the housing. The primary combustion chamber communicates with a combustion gas conduit that conducts combustion gases along an upwardly extending tortuous path to an exhaust stack to provide heating. A pivotal, latchable door is attached to the front of the combustion assembly housing.

A highly efficient indoor heating system and device is described. The device is equipped with an internal chimney, as well as vents that are configured to maximize the draft applied to the flame housed within a stove combustion area. The heater is configured to reach temperatures exceeding 300 degrees Fahrenheit in approximately ten minutes. A gravity fed fuel tube, potentially in communication with a wood pellet hopper, is configured to deliver fuel to the stove of the heater. Heat is distributed throughout the structure of the device, and a convection chamber within the device ensures that heat generated is not quickly lost via exhaust.

A highly efficient indoor heating system and device is described. The device is equipped with an internal chimney, as well as vents that are configured to maximize the draft applied to the flame housed within a stove combustion area. The heater is configured to reach temperatures exceeding 300 degrees Fahrenheit in approximately ten minutes. A gravity fed fuel tube, potentially in communication with a wood pellet hopper, is configured to deliver fuel to the stove of the heater. Heat is distributed throughout the structure of the device, and a convection chamber within the device ensures that heat generated is not quickly lost via exhaust.

Pellet grills and associated methods of operation are disclosed. An example pellet grill includes a lid, a cooking chamber, an engine, and one or more processors. The lid is movable between a closed position and an open position. The engine is configured to output heat to the cooking chamber. The one or more processors are configured to detect a closing movement of the lid. In response to detecting the closing movement, the one or more processors are configured to command the engine to operate in an increased output mode that increases the heat output of the engine.

A portable bonfire apparatus disclosed here includes a grate frame, an ash collector tray, and a set of elongate rods. The grate frame is supported by one or more leg member assemblies, where the grate frame receives and burns firewood at an elevated height via each leg member assembly. The ash collector tray is positioned below the grate frame to collect ash from the burned firewood, and the elongate rods obliquely extend outwardly from opposing sides of the grate frame to receive and position additional firewood. The additional firewood slides towards the grate frame by gravity when the firewood received on the grate frame burns to ash and collects in the ash collector tray.

A portable bonfire apparatus disclosed here includes a grate frame, an ash collector tray, and a set of elongate rods. The grate frame is supported by one or more leg member assemblies, where the grate frame receives and burns firewood at an elevated height via each leg member assembly. The ash collector tray is positioned below the grate frame to collect ash from the burned firewood, and the elongate rods obliquely extend outwardly from opposing sides of the grate frame to receive and position additional firewood. The additional firewood slides towards the grate frame by gravity when the firewood received on the grate frame burns to ash and collects in the ash collector tray.

A pellet stove includes a hopper for storing pellets, a basket for receiving the pellets by gravity, a duct for conveying combustion air to the basket, and a conduit for conducting heated air away from the basket. The position of the basket is adjustable, such as by raising and lowering it, or by rotating it, so as to control the number of pellets in the area of most intense combustion. One or more burn plates, positioned below the basket, provide platforms on which pellets falling through the basket can burn down to a smaller size. The pellet stove requires no external source of power. The stove so constructed enables quiet, efficient and clean burning of the pellets.

A pellet stove includes a hopper for storing pellets, a basket for receiving the pellets by gravity, a duct for conveying combustion air to the basket, and a conduit for conducting heated air away from the basket. The position of the basket is adjustable, such as by raising and lowering it, or by rotating it, so as to control the number of pellets in the area of most intense combustion. One or more burn plates, positioned below the basket, provide platforms on which pellets falling through the basket can burn down to a smaller size. The pellet stove requires no external source of power. The stove so constructed enables quiet, efficient and clean burning of the pellets.

Disclosed in the present disclosure is a biomass fuel burning furnace, including: a furnace body, provided with a first air inlet and a fuel inlet, provided with a first combustion chamber, a second combustion chamber, and a third combustion chamber sequentially communicating within the furnace body, wherein the first combustion chamber is used to receive biomass fuel, the second combustion chamber is used for a combustion of the flue gases and for obtaining a mixture to be combusted, and the third combustion chamber is used for directing a flame resulting from the combustion of flue gases in the mixture to be combusted; a fuel-input funnel for feeding biomass fuel; and a revolving door for an opening or a closure of the adjustable air inlet on the fuel-input funnel.