An apparatus and system for efficiently and safely transferring heat from a masonry heater to an external heating device using coil pipes and a liquid circulation pump. Circulation of a heat transfer liquid in the apparatus and system is controlled based on the measured temperature of the heat transfer liquid in the coil pipe on a return side of the masonry heater. Two additional sensors near the external heating device are used to control the flow rate of the circulation of the heat transfer liquid in the apparatus and system, thereby controlling the amount of heat actually transferred to the external heating device.

There is provided a wood pellet burner assembly for a wood pellet boiler, not shown. There is a fixed and easily removable fuel apertured grate mounted above and spaced apart from a base wall forming part of a main support enclosure. A movable scraper subassembly carrying an apertured flame tube is provided which can be moved in and out of the main support enclosure to perform a scraping action on the fixed fuel apertured grate to deliver ash and clinker which have not fallen through the grate during combustion off the grate out of the main support enclosure. This cleaning operation can be carried out at suitable preset time intervals.

There is provided a wood pellet burner assembly for a wood pellet boiler, not shown. There is a fixed and easily removable fuel apertured grate mounted above and spaced apart from a base wall forming part of a main support enclosure. A movable scraper subassembly carrying an apertured flame tube is provided which can be moved in and out of the main support enclosure to perform a scraping action on the fixed fuel apertured grate to deliver ash and clinker which have not fallen through the grate during combustion off the grate out of the main support enclosure. This cleaning operation can be carried out at suitable preset time intervals.

An oven apparatus includes an oven portion and an oven controller. The oven portion has an upper chamber with an oven opening, a support platform having a void space in the center of the support platform for accommodating a rotary structure on which an object can be arranged, and a heating device is arranged in the upper chamber. The oven controller has a power module electrically coupled to an external power source for providing a power required for operation of oven apparatus, and a heating control module further having a first and a second heat control units electrically coupled to the heating device and the rotary structure, respectively, for controlling a temperature of the heating device and a temperature of the rotary structure, respectively. In addition, the oven apparatus further has a conduit assembly around the oven housing for recycling the emitted heat.

An oven apparatus includes an oven portion and an oven controller. The oven portion has an upper chamber with an oven opening, a support platform having a void space in the center of the support platform for accommodating a rotary structure on which an object can be arranged, and a heating device is arranged in the upper chamber. The oven controller has a power module electrically coupled to an external power source for providing a power required for operation of oven apparatus, and a heating control module further having a first and a second heat control units electrically coupled to the heating device and the rotary structure, respectively, for controlling a temperature of the heating device and a temperature of the rotary structure, respectively. In addition, the oven apparatus further has a conduit assembly around the oven housing for recycling the emitted heat.

An apparatus for use combined cooking and water heating, the apparatus including a combustion chamber for burning a fuel to generate heat, a cooking support positioned above the combustion chamber in use to allow cooking to be performed, a heat exchanger in thermal communication with the combustion chamber, a water reservoir coupled to the heat exchanger via delivery and return fluid paths, allowing water from the reservoir to be circulated through the heat exchanger to thereby heat the water in the reservoir, a separator provided in the return path to separate steam from heated water and a condenser element for condensing steam to thereby provide distilled water to a distilled water outlet.

A stove or a stove body has a trigger control that directs toxic fumes to the stovetop during cooking and to a side outdoor venting channel when cooking container is removed from the stovetop to ensure safe release of toxic fumes.

A stove or a stove body has a trigger control that directs toxic fumes to the stovetop during cooking and to a side outdoor venting channel when cooking container is removed from the stovetop to ensure safe release of toxic fumes.

A heater having a combustion chamber. The heater includes a hopper and a chute extending from an outlet of the hopper to the combustion chamber. The heater includes a chute extending from the hopper to the combustion chamber, a screw extending through the chute into the hopper, and a drive connected to the screw for turning the screw in a direction in which the flight would, but for downward forces, lift the fuel. The heater has a vane rotatably attached to the screw that rotates downward along the screw in absence of upward forces counteracting gravity. The vane is cambered to produce upward forces when turning with the screw beneath an upper surface of the fuel. The vane is biased toward the upper surface of the fuel to level the upper surface of the fuel and prevent the fuel from rat holing and arching.

An oven apparatus includes an oven portion and an oven controller. The oven portion has an upper chamber with an oven opening, a support platform having a void space in the center of the support platform for accommodating a rotary structure on which an object can be arranged, and a heating device is arranged in the upper chamber. The oven controller has a power module electrically coupled to an external power source for providing a power required for operation of oven apparatus, and a heating control module further having a first and a second heat control units electrically coupled to the heating device and the rotary structure, respectively, for controlling a temperature of the heating device and a temperature of the rotary structure, respectively. In addition, the oven apparatus further has a conduit assembly around the oven housing for recycling the emitted heat.