An air handling unit (AHU) for a heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a housing and a combustion heater disposed within the housing. The housing includes a combustion section with a first channel and a second channel. The combustion heater includes heat exchanger tubes and a tube support that supports heat exchanger tubes within the combustion section. The tube support slidably disposed in the first channel and the second channel. The combustion heater configured to be slidably removable from the AHU. An AHU for an HVACR system includes a housing with a fan section and a fan assembly disposed within the housing. The fan assembly including a pair of grooves slidably disposed on a pair of rails of the housing. The fan assembly configured to be both slidably removable from the AHU and liftably removable from the AHU.

A storage electric water heater includes a tank, an inlet tube, an outlet tube, an isolating member, and a heating device, wherein the tank has a storing space. The inlet tube and the outlet tube are disposed in the tank. The isolating member is disposed in the storing space to divide the storing space into a first chamber and a second chamber. The first chamber communicates with the inlet tube and the outlet tube. The heating device is disposed in the second chamber and includes a tube body and a heating element. Two ends of the tube body communicate with the first chamber, so that water in the first chamber could enter an interior of the tube body. The heating element is disposed on a tube wall of the tube body. Thermal energy generated by the heating element could be transferred to the interior of the tube body via the tube wall to heat up water in the tube body, thereby facilitating the thermal convection of water in the first chamber.

Disclosed are a heating device, a sanitary water supply device, and a sanitary cleaning device. The heating device comprises a main body and one or more ceramic heating plates. The main body comprises a heating cavity, and the one or more ceramic heating plates are disposed in the heating cavity to define a heating channel within the heating cavity. A first water inlet is defined at a first end of the heating channel, and a first water outlet is defined at a second end of the heating channel. The one or more ceramic heating plates comprise a first heating surface and a second heating surface facing away from each other, and a flow direction of cleaning water in the heating channel is along the first heating surface and the second heating surface in sequence.

Disclosed are a heating device, a sanitary water supply device, and a sanitary cleaning device. The heating device comprises a main body and one or more ceramic heating plates. The main body comprises a heating cavity, and the one or more ceramic heating plates are disposed in the heating cavity to define a heating channel within the heating cavity. A first water inlet is defined at a first end of the heating channel, and a first water outlet is defined at a second end of the heating channel. The one or more ceramic heating plates comprise a first heating surface and a second heating surface facing away from each other, and a flow direction of cleaning water in the heating channel is along the first heating surface and the second heating surface in sequence.

An electric heater to heat a flow of a fluid having a jacket block comprising a plurality of longitudinal bores to allow the through-flow of a gas phase medium. An elongate heating element extends through each of the bores and is positionally stabilised within the jacket block via a plurality of stabilising fins that project radially inward to at least partially surround the elongate heating element within each of the bores.

An electric heater to heat a flow of a fluid having a jacket block comprising a plurality of longitudinal bores to allow the through-flow of a gas phase medium. An elongate heating element extends through each of the bores and is positionally stabilised within the jacket block via a plurality of stabilising fins that project radially inward to at least partially surround the elongate heating element within each of the bores.

The purpose of the present invention is to provide a smoke tube boiler which can prevent leakage of mixed gas and exhaust gas through a gap between a mix chamber and an ignition bar assembly. To this end, the smoke tube boiler according to the present invention comprises: a mix chamber having a mixing space, in which a combustion gas and air are mixed, and a flat plate type burner, the mix chamber being disposed on the upper side of a combustion chamber; an ignition bar assembly assembled to pass through one side of the mix chamber and extending across the upper portion of the combustion chamber to the lower side of the flat plate type burner; and a sealing means for preventing the mixed gas in the mixing space and an exhaust gas in the combustion chamber from leaking to the outside through a gap between the mix chamber and the ignition bar assembly.

The purpose of the present invention is to provide a smoke tube boiler which can prevent leakage of mixed gas and exhaust gas through a gap between a mix chamber and an ignition bar assembly. To this end, the smoke tube boiler according to the present invention comprises: a mix chamber having a mixing space, in which a combustion gas and air are mixed, and a flat plate type burner, the mix chamber being disposed on the upper side of a combustion chamber; an ignition bar assembly assembled to pass through one side of the mix chamber and extending across the upper portion of the combustion chamber to the lower side of the flat plate type burner; and a sealing means for preventing the mixed gas in the mixing space and an exhaust gas in the combustion chamber from leaking to the outside through a gap between the mix chamber and the ignition bar assembly.

The present invention relates to a heating system for heating a fluid medium, said heating system comprises a carrier unit and a heating unit, with the carrier unit having a surface comprising at least a plane portion being at least substantially normal to a longitudinal axis and an at least part-circularly shaped groove extending from said carrier unit and wound about the longitudinal axis, and the heating unit having a heating element at least partially arranged in said groove of said carrier unit. In the inventive heating system, the groove extends at least partially helically about the longitudinal axis. The present invention further relates to a heated conveyor pump for conveying and heating a fluid medium, said pump comprises a drive unit, a pump housing and the inventive heating system. The heating system is coupled to the pump housing with the groove extending into the pump housing in a manner such that the size of the cross-section of the groove decreases in the flow direction of the conveyed fluid medium.

A burner assembly according to aspects of the disclosure includes a burner surface carried by a burner, the burner surface extending outward from a front side of the burner, a housing coupled to the burner on a side opposite the front side of the burner, a gasket disposed between the burner and the housing, a thermally anisotropic protective covering located on the front side of the burner and surrounding a perimeter of the burner surface, and an igniter positioned adjacent to the burner surface.