A forced air heater that includes two air moving devices for improved control of air and fuel mixture for combustion, and improved air flow the heater. In addition to better air flow, the heater includes an improved fuel system that utilizes a pump and delivery controls to accommodate reduced air flow while avoiding incomplete combustion and fume odors.

The portable windshield defroster is a device that sits on the exterior side of a windshield and melts snow and ice that has accumulated on the windshield. The portable windshield defroster is powered either through the automobile electrical system or through solar panels.

A portable electric heater comprises a heater unit, base assembly, and a shaft extending upwardly from the base assembly. The shaft includes a first end secured to the base assembly and a second end to which the heater unit is secured. The portable electric heater also comprises a renewable energy source and a power assembly including a power management module for controlling power distribution of the renewable energy source to the heater unit.

A column-conditioning enclosure includes a column chamber adapted to hold one or more chromatography separation columns. A duct system provides an airflow path around the column chamber such that the one or more chromatography separation columns held within the column chamber are isolated from the airflow path. An air mover disposed in the airflow path generates a flow of air within the duct system. A heat exchanger system disposed in the airflow path near the air to exchange heat with the air as the air flows past the heat exchanger system. The air circulates through the duct system around the column chamber, convectively exchanging heat with the column chamber to produce a thermally conditioned environment for the one or more chromatography separation columns held within the column chamber.

A mobile heater adapted to heat air from the environment and to supply the heated air into a cabin like a recreational vehicle or a tent, the heater comprises a housing, a supply air inlet arranged at a side of the housing, a supply air outlet arranged at another side of the housing, a supply air channel inside the housing extending the between the supply air inlet and the supply outlet, means for generating a supply air flow inside the supply air channel from the supply air inlet to the supply air outlet, and flexible supply air hose that can be removably coupled to the supply air outlet and by means of which the heated air can be led inside the cabin, the heater further comprises a burner chamber inside the housing, wherein the supply air channel passes through the burner chamber, a burner arranged inside the burner chamber, a heat exchanger arranged inside the burner chamber and being designed as a tube section that forms at least a section of the supply air channel, a control unit and a user interface , wherein the burner extends below and along a vertical projection of the heat exchanger, and the heat exchanger has a plurality of first

lamellas and second lamellas, wherein the first lamellas extend from the outer surface of the tube section inside the burner chamber and parallel to a vertical plane, and the second lamellas extend from the inner surface of the tube section inside the supply air channel and along the direction of the supply air flow.

A variable-frequency heater, which is provided in a heating space. A plurality of hot air channels are embedded in walls of the heating space. Hot air is output from the variable-frequency heater to the hot air channels for heating the heating space. The variable-frequency heater includes a housing, which includes a first enclosure plate, a second enclosure plate, a front support plate and an access panel, and a temperature controller. The housing is internally provided with a gas heating assembly, which includes a heat exchanger at a front end inside the housing. The heat exchanger is provided with an igniter. The access panel is provided with an exhaust panel, which is provided with an air outlet pipe and an air inlet pipe connected to the heat exchanger. The first enclosure plate is provided with a gas pipe connected to a gas source.

This application is directed to a heating apparatus for mounting within a ceiling. The heating apparatus includes an enclosure, a heating element mounted to a portion on the enclosure, a temperature sensor for detecting a temperature of the enclosure, and a fan located within the enclosure for generating airflow through the enclosure to dissipate heat. The fan may be turned on when a temperature detected by the temperature sensor reaches a pre-determined threshold.

A heating appliance including a backward-incline blower is provided herein. a modified backward-incline blower design is described herein. This modified blower housing design inverts the motor side of the blower wheel and provides an inlet above the bottom of the furnace. That is, rather than the motor extruding from the top of the housing, the motor and shaft are provided below the bottom of the housing. This allows the backward-incline blower to be provided in a conventional heating appliance while still allowing the blower to have sufficient space below the blower to receive input air from the side vents of the heating appliance. The housing may be formed such that the backward-incline fan may be provided within existing rail systems within the heating appliance, allowing the backward-inline blower to be easily removed from the heating appliance for maintenance or motor replacement.