Disclosed is a heating device, including a housing, and an electrothermal film and a fan arranged in the housing, wherein the fan is located at a bottom of the electrothermal film, the fan is provided with an air inlet facing upwards and an air outlet facing forwards, and the housing is provided with a vent hole at a position corresponding to the air outlet.

Some embodiments of the present disclosure provide an electric heater, which includes: a housing provided with an air inlet and an air outlet, and the housing internally having an air duct communicated between the air inlet and the air outlet; and a heating member and a convection member both being assembled in the air duct, wherein the heating member being configured for heating the air entering from the air inlet to the air duct during energization, the convection member being configured for blowing a heated air from the air duct to the air outlet for discharging. Herein the air outlet is provided on a bottom end of the housing close to a ground.

The present disclosure relates to the field of air conditioning technology. In particular, it involves an air control method for air handler unit.

Systems, tools, and methods are presented that enable a circuit to introduce a random time delay before actuating a relay to start or stop a supply of electrical power to a heating element of a heating, ventilating, and air conditioning (HVAC) system. In one instance, the circuit includes a time-delay switch electrically connected to the relay. The time-delay switch has a random time delay before entering a closed state or open state. The relay is operable to start and stop a supply of electrical power to the heating element in response to the switch entering, respectively, the closed state and the open state. Other systems, tools and methods are presented. Other systems, tools and methods are presented.

Disclosed are an air duct assembly and a fan heater applying in the air duct assembly, which includes a volute tongue positioned in the volute forms an air duct with the volute. The air duct is configured with an air inlet and an air outlet. A cross-flow wind turbine positioned in the air duct introduce the airflow into the air duct from the air inlet, and blow out the airflow in the air duct through the air outlet. The volute includes a first volute tongue member, the size of the angle between the line connecting the root portion M of the first volute tongue member to the axis O of the cross-flow wind turbine and the line connecting the root portion N of the second volute tongue member to the axis O of the cross-flow wind turbine on the same cross-section is from 110° to 170°.

A system and method for improving the responsiveness of forced hot water heat exchangers placed around the baseboards of conditioned living spaces and improving the efficiently of centralized hot water heating systems. The control system may comprise a convector baseboard heat exchanger or a replacement heat exchanger cover, and a blower, a diffuser and sensors which are mounted to one or more of the baseboard heat exchangers, the heating system influent and effluent loops, the fuel supply and the recirculation pump. When the heating system and forced hot water loop reaches its operating temperature, the blower activates to rapidly transfer energy from the-forced hot water loop into the air and disperse treated, heated air into the conditioned spaces. After the centralized heating system turns off, the system continues to transfer energy from the forced hot water into the air of the conditioned spaces until the latent heat of the centralized heating system has been extracted and the return loop temperatures are at levels consistent with optimal boiler performance.

A combination assembly or apparatus of a ceiling fan and heater. The combination assembly or apparatus includes a ceiling fan, a heater, a fan to blow air across the heater, a translucent band, motor driven rotating reflective foils each having mounted therein a light source (e.g. an LED) to shine through the translucent band to give a motion effect like a flickering.

A heating, ventilation, and air conditioning (HVAC) system comprises a housing defining a chamber configured to receive a first air flow and a second air flow. The chamber comprises a vacant section and a heating section, and the heating section comprises a heating coil. A first blower is configured to direct the first air flow into the vacant section of the chamber and a second blower is configured to direct the second air flow into the heating section of the chamber. The housing is configured to direct the first air flow from the vacant section to the heating section to combine with the second air flow and configured to direct the first air flow and the second air flow across the heating coil.

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 fireplace (1210) includes a fireplace housing (412) and a heater assembly (1226) that is configured to generate heated air. The heater assembly (1226) is configured to be installed substantially within the fireplace housing (412). In various embodiments, the heater assembly (1226) includes a heater body (1245), and a grill cover (1248) that is couplable to the heater body (1245). The grill cover (1248) includes a cover body (1295) that is couplable to the heater body (1245), and at least one extender (1296) that is configured to be positioned substantially adjacent to the cover body (1295). The cover body (1295) has a first cover length. The cover body (1295) and the at least one extender (1296) cooperate to have a second cover length that is greater than the first cover length. The second cover length is substantially equal to a dimension of the fireplace housing (412).