A hybrid heater includes a heater core portion connected to a cooling water inflow tube and a cooling water outflow tube at one side and having an inside through which cooling water circulates, and a PTC heater portion fastened to a front of the heater core portion, inside of which a plurality of plate-type PTC rods arranged in parallel in a horizontal direction are provided, and provided at one side with a connector that is connected electrically to the plurality of PTC rods.

A hybrid heater includes a heater core portion connected to a cooling water inflow tube and a cooling water outflow tube at one side and having an inside through which cooling water circulates, and a PTC heater portion fastened to a front of the heater core portion, inside of which a plurality of plate-type PTC rods arranged in parallel in a horizontal direction are provided, and provided at one side with a connector that is connected electrically to the plurality of PTC rods.

A heat recovery system includes a compressor, a solar panel, and a first heat exchanger and a second heat exchanger in fluid connection to form a closed circuit. The compressor is configured to facilitate fluid movement in the fluid circuit between the solar panel, the first heat exchanger and the second heat exchanger. The solar panel includes a plurality of solar cells connected in parallel, and each solar cell includes a plurality of metal tubes for fluid to pass through. A temperature sensor is mounted within each of the solar cells and configured to measure temperature inside the respective solar cell. Each solar cell is connected to the circuit via a respective pressure valve, and the status of the pressure valve is configured to depend on the measurement of the temperature sensor in the respective solar cell.

A heat recovery system includes a compressor, a solar panel, and a first heat exchanger and a second heat exchanger in fluid connection to form a closed circuit. The compressor is configured to facilitate fluid movement in the fluid circuit between the solar panel, the first heat exchanger and the second heat exchanger. The solar panel includes a plurality of solar cells connected in parallel, and each solar cell includes a plurality of metal tubes for fluid to pass through. A temperature sensor is mounted within each of the solar cells and configured to measure temperature inside the respective solar cell. Each solar cell is connected to the circuit via a respective pressure valve, and the status of the pressure valve is configured to depend on the measurement of the temperature sensor in the respective solar cell.

A heat gun includes a head portion. The head portion defining a flow passage having an inlet end at one end and an outlet end at another opposite end, and including an inlet portion, an outlet portion and a flow guiding portion disposed between the inlet and outlet ends. The outlet portion is formed with two long sides and two short sides. The flow guiding portion is disposed between the inlet and outlet portions. The flow passage includes two flow guiding protrusions disposed at the flow guiding portion. The two flow guiding protrusions are disposed oppositely and extend oppositely along the long sides.

A heat gun includes a head portion. The head portion defining a flow passage having an inlet end at one end and an outlet end at another opposite end, and including an inlet portion, an outlet portion and a flow guiding portion disposed between the inlet and outlet ends. The outlet portion is formed with two long sides and two short sides. The flow guiding portion is disposed between the inlet and outlet portions. The flow passage includes two flow guiding protrusions disposed at the flow guiding portion. The two flow guiding protrusions are disposed oppositely and extend oppositely along the long sides.

A system for conditioning air in a building including a fan-coil unit arranged adjacent to or within an indoor space within the building and additionally configured to at least one of heat and cool the air of the indoor space, and a scrubber arranged adjacent to or within the indoor space, the scrubber configured during a scrub cycle for scrubbing of indoor air from the indoor space. The scrubber includes one or more adsorbent materials arranged therein to adsorb at least one predetermined gas from the indoor air during the scrub cycle, a source of outdoor air, and an exhaust, wherein the scrubber is configured during a purge cycle to direct a purging air flow received from the source of outdoor air over and/or through the adsorbent materials to purge at least a portion of the at least one predetermined gas adsorbed by the adsorbent materials during the scrub cycle from the adsorbent materials and thereafter exhausting the flow via the exhaust.

A system for conditioning air in a building including a fan-coil unit arranged adjacent to or within an indoor space within the building and additionally configured to at least one of heat and cool the air of the indoor space, and a scrubber arranged adjacent to or within the indoor space, the scrubber configured during a scrub cycle for scrubbing of indoor air from the indoor space. The scrubber includes one or more adsorbent materials arranged therein to adsorb at least one predetermined gas from the indoor air during the scrub cycle, a source of outdoor air, and an exhaust, wherein the scrubber is configured during a purge cycle to direct a purging air flow received from the source of outdoor air over and/or through the adsorbent materials to purge at least a portion of the at least one predetermined gas adsorbed by the adsorbent materials during the scrub cycle from the adsorbent materials and thereafter exhausting the flow via the exhaust.

A system and method for using waste heat from computing devices is disclosed. Computing devices may be positioned in a device rack and output exhaust air such that heat is transferred into a heat chamber with controllable temperature and a work item rack that is configured to hold one or more work items. By transferring the heat from the computing devices to heat or preheat the heat chamber, the captured heat can be used for useful work such as dehydrating, baking, drying or curing. Humidity can also be controlled, and conveyors may be used to improve the flow of work items. The energy reused may be calculated, recorded and attributed to the work items processed or the work performed by the computing devices.

A system and method for using waste heat from computing devices is disclosed. Computing devices may be positioned in a device rack and output exhaust air such that heat is transferred into a heat chamber with controllable temperature and a work item rack that is configured to hold one or more work items. By transferring the heat from the computing devices to heat or preheat the heat chamber, the captured heat can be used for useful work such as dehydrating, baking, drying or curing. Humidity can also be controlled, and conveyors may be used to improve the flow of work items. The energy reused may be calculated, recorded and attributed to the work items processed or the work performed by the computing devices.