The invention relates to a heating device (1) for an air-conditioning housing, said heating device (1) comprising a heating body (2) supplied with current for heating an air flow passing through said heating body (2), said heating body (2) comprising heating elements through which said current passes and which are arranged in electrically insulated tubes (4) of the heating elements, said heating elements being controlled via a distribution unit (3), said heating device (1) comprising means for earthing a plurality of metal elements distributed in the heating body (2) and the distribution unit (3). Said heating device (1) is characterised in that said earthing means consist of a single earthing circuit which passes through the heating body (2) and the distribution unit (3) and is formed by arranging said metal elements in series with direct contact between said metal elements.

An electric heater for heating a liquid or frozen substance in a motor vehicle. In particular, an electric heater for heating electric car batteries or an HVAC system or for a system for reducing the environmental pollution of the motor vehicle. The electric heater includes a metal sheet adapted to generate heat when it is crossed by an electric current. two polymeric layers between which the metal sheet is arranged, and two metal layers, between which the two polymeric layers are arranged. The two metal layers are hermetically sealed to each other defining a casing, which prevents the substance to be heated from coming into contact with the two polymeric layers and with the metal sheet. A plurality of metal flaps extend transversely from an external face of at least one metal layer of the two metal layers.

Disclosed is a portable radiant heating device that has a base, a radiant heat source mounted in a tiltable reflector, and a safety interlock device located in the base. The safety interlock uses a pressure-sensitive foot that prevents the heater from producing infrared heat when not in contact with a mounting surface. The safety interlock device also prevents the heater from producing infrared heat when the reflector is not tilted so as to prevent excessive amounts of infrared heat from being directed towards the mounting surface.

A full body dryer. The dryer includes a semi-circular base with a plurality of air tubes extending arcuately upward therefrom. The air tubes are extendable and retractable to adjust a height of the air tubes for use or for compact storage or transport. An upper end of each air tube of the plurality of air tubes includes an air vent to direct forced air toward a portion of an individual's body to dry the individual's body.

An apparatus and method to selectively create a heat transfer effect and sensation of cooling within bedding on a mattress. A programmable application is accessible on a wireless network and is programmed to provide appropriate settings to attain changes over time of a space within bedding that pertain to at least one of heating the space and realizing a cooling sensation within the space. A wireless receiver is configured to receive commands in a wireless manner that are indicative of the appropriate settings provided by the programmable application to effect changes over time of the space within the bedding attributed to heat transfer with respect to the at least one of heating the space and realizing a cooling sensation within the space. The heat transfer occurs as a result of fluid flow either within a mattress or within space in bedding over the mattress.

An electric gas heater (2) comprises a housing (4), a number of thin tubes (16) arranged in a bundle (18) inside the housing (4), an insulation member (20) configured for supporting the number of thin tubes (16) separated from each other and electrically insulated from each other. Individual tubes (16) of the number of thin tubes (16) are of an electric resistance material, and the insulation member (20) comprises a fibrous material.

Disclosed is a heating module (12) for a heating system (10) of a habitable vehicle, the module comprising: a module housing (36) having an air inlet opening (56) and an air outlet opening (58); an air conduction element (76) which is accommodated in the module housing (36), has multiple conduction sections (92, 94, 96), and is connected to the air inlet opening (56) and the air outlet opening (58); and at least one heating element (110, 112; 210, 212), said heating element (110, 112; 210, 212) being designed to heat air flowing from the air inlet opening (56) to the air outlet opening (58).

A positive temperature coefficient electric heater for a vehicle includes a support part, a control circuitry, and a first and a second radiating layers overlapping one another, each radiating layer having a plurality of heating rods extending from the support part and connected in parallel to the control circuitry. Each radiating layer has a first layer sector and a second layer sector controlled independently of one another. The radiating layers may be controlled independently of one another. In the first radiating layer, the second section of the heating rods is capable of generating greater thermal power than the first section of the heating rods and, in the second radiating layer, the first section of the heating rods is capable of generating greater thermal power than the second section of the heating rods.

An electric heater system includes an inlet, an outlet, a plurality of heat exchanger assemblies, and one or more connectors. The plurality of heat exchanger assemblies are connected in series. Each heat exchanger assembly includes a vessel, heating elements disposed within the vessel, and a fluid guide member. The connectors secure the vessels of the plurality of heat exchanger assemblies to each other. The connectors are also in fluid communication with the vessels. Fluid entering the inlet flows through the heat exchanger assemblies and through one or more connectors where it exits the outlet. The fluid guide members of the heat exchanger assemblies are of different or the same combinations to generate a predetermined pressure drop between the inlet and the outlet.

A gas heating apparatus includes a heating element having a flat plate shape, a heat-resistant enclosure in which a space having a flat plate shape is provided, the heating element being disposed in the space with a gap provided between the heating element and the heat-resistant enclosure, a gas inlet joint connected to the heat-resistant enclosure to allow gas to flow into the space, a gas outlet joint connected to the heat-resistant enclosure to allow the gas that has passed through the space to flow out, and an induction coil disposed in parallel with the heating element on a lower surface of the heat-resistant enclosure, the induction coil inductively heating the heating element on the basis of electric power supplied.