Disclosed in an embodiment is a fluid heater including a main body including a partitioning part having a plate shape and a flow passage forming part forming a flow passage on the other surface of the partitioning part, a heating plate disposed on the flow passage forming part and having a plate shape and including a heating pattern having a shape corresponding to the flow passage, a circuit board disposed on one surface of the partitioning part and configured to control the heating pattern to generate heat, and a bus bar electrically connecting the heating pattern and the circuit board, wherein the flow passage forming part includes a turning vane disposed in a curved flow passage of the flow passage.

A heater comprising a ceramic heater element and at least two fins for dissipating heat from the ceramic heater element, wherein the ceramic heater element extends along a plane in one dimension and the at least two fins extend away from the plane, and wherein the at least two fins are connected to the ceramic heater element via discrete connecting portions.

A high turndown furnace for an air handling system. In one example, the furnace includes a plurality of tubes divisible by four with a first modulating valve supplying gas to ¼ of the tubes and a second modulating valve supplying gas to ¾ of the tubes. In one aspect, the furnace is capable of providing a 16:1 turndown. In one aspect, the furnace is capable of providing seamless turndown operation throughout the entire firing range.

The present invention relates to an electric auxiliary heating device (1) for heating a flow of air passing through in particular a conduit of a ventilation, heating and/or air conditioning installation of a motor vehicle, the auxiliary heating device comprising a casing that houses at least one heating module, said casing comprising: ∘a heating compartment of which a first end (61) comprises an opening (600) and ∘a connection interface (8) comprising: .square-solid.a first plate (86) that is essentially planar and extends essentially parallel to the opening so as to cover said opening, and .square-solid.a sheath (88) that extends in projection from the first plate (86) opposite the heating compartment, .square-solid.slots (80) passing through the first plate (86) and opening inside the sheath (88), the connection interface (8) comprising, on its internal face (89) that is oriented toward the heating compartment, at least one insertion stub (85) of which at least one of the edges facing the slots (80) is chamfered.

The disclosed technology includes a combustion system providing ease of access to components of the combustion system and optimal placement of a burner such that efficient combustion and heat transfer can occur. The combustion system can include an inner tube having a first end and a second end, the second end having a flange with a sensor port, and an outer tube having a first end and a second end. The inner tube can be disposed within the outer tube. The inner tube can have an outer diameter less than an inner diameter of the outer tube, creating a gap between the outer tube and inner tube. An ignitor assembly and a flame sensor assembly can extend through the sensor port and the gap and be positioned proximate a burner.

A guide system including a top end, a bottom end, a lumen and a plurality of openings, the system is disposed within a coil lumen at the bottom end of the heat exchanger coil with the bottom end of the system extending beyond the bottom end of the coil in a direction from the top end to the bottom end of the coil, the system configured in a shape of the coil lumen and the openings are disposed on the bottom end of the system, wherein the heat exchanger is configured to channel the flue flow from a burner through a path to heat a fluid flow of the coil before entering the lumen of the system via the openings to avoid a pressure drop due to a tendency for the flue flow to follow a path defined by a shape of the bottom end of the coil.

A portable heater includes a housing having an air inlet and an air outlet, one or more burners housing within the housing and configured to heat air passing through the housing from the air inlet to the air outlet, and a duct positioned in a storage compartment of the housing. The duct includes a first end coupled to the storage compartment and a second end extendable from the housing when a door of the storage compartment is in an open position.

A portable heater includes a housing having an air inlet and an air outlet, one or more burners housing within the housing and configured to heat air passing through the housing from the air inlet to the air outlet, and a duct positioned in a storage compartment of the housing. The duct includes a first end coupled to the storage compartment and a second end extendable from the housing when a door of the storage compartment is in an open position.

The present invention relates to a heat exchanger assembly and a water heater comprising same, wherein the heat exchanger assembly comprises a heat exchanger unit provided with an inlet for introducing a fluid and an outlet for discharging the fluid, and the heat exchanger unit may comprise: a first plate; a second plate disposed on one surface side of the first plate to define, together with the first plate, an internal space in which the fluid introduced through the inlet moves toward the outlet; a heat generation member coupled to at least one of the first plate and the second plate and provided to provide heat into the internal space; and a guide part disposed in the internal space and provided to guide the fluid introduced through the inlet toward one plate, to which the heat generation member is coupled, of the first plate and the second plate.

A heat exchanger unit according to the present invention includes a sensible heat exchanger including a sensible heat exchange pipe disposed in a sensible heat exchange area for heating water used for heating by receiving sensible heat generated by a combustion reaction, wherein the sensible heat exchange pipe receives the water used for heating and flows same through the interior, and a sensible heat fin disposed in the sensible heat exchange area. The sensible heat fin is formed in a plate shape across the sensible heat exchange pipe and penetrated by the sensible heat exchange pipe; and a latent heat exchanger positioned downstream from the sensible heat exchange area on the basis of a reference direction, which is a flow direction of combustion gas generated during the combustion reaction, the latent heat exchanger including a latent heat exchange pipe disposed in a latent heat exchange area.