A deflector for a condensation heat exchanger and to an exchanger provided with such a deflector. The deflector includes two front and rear cups with inner surfaces at the bottom designed in relief so as to have at least one circulation groove. The two cups are assembled on either side of a central partition so that each groove forms, with the partition, a channel in which a heat-transfer fluid is intended to circulate. The channels of the front and rear cups are connected via an opening bored into the central partition, so that the heat transfer fluid can circulate from an inlet coupling to an outlet coupling of the deflector, through the channels by flowing on either side of the central partition.

A deflector for a condensation heat exchanger and to an exchanger provided with such a deflector. The deflector includes two front and rear cups with inner surfaces at the bottom designed in relief so as to have at least one circulation groove. The two cups are assembled on either side of a central partition so that each groove forms, with the partition, a channel in which a heat-transfer fluid is intended to circulate. The channels of the front and rear cups are connected via an opening bored into the central partition, so that the heat transfer fluid can circulate from an inlet coupling to an outlet coupling of the deflector, through the channels by flowing on either side of the central partition.

A water heater can include a tank. The water heater can also include a heat exchanger that includes multiple flue tube segments disposed within the tank, where the flue tube segments include a thermally-conductive material. The heat exchanger can further include a heating system that heats a fluid to create a heated fluid, where the heating system further circulates the heated fluid through the flue tube segments, where the flue tube segments absorb thermal energy from the heated fluid and subsequently dissipate the thermal energy into the tank to convert the unheated water to the heated water. The water heater can also include a controller coupled to the heating system, where the controller operates the heating system outside of a normal heating cycle when the controller determines that condensation has accumulated in the flue tube segments, where operating the heating system outside of the normal heating cycle removes the condensation.

A water heater can include a tank. The water heater can also include a heat exchanger that includes multiple flue tube segments disposed within the tank, where the flue tube segments include a thermally-conductive material. The heat exchanger can further include a heating system that heats a fluid to create a heated fluid, where the heating system further circulates the heated fluid through the flue tube segments, where the flue tube segments absorb thermal energy from the heated fluid and subsequently dissipate the thermal energy into the tank to convert the unheated water to the heated water. The water heater can also include a controller coupled to the heating system, where the controller operates the heating system outside of a normal heating cycle when the controller determines that condensation has accumulated in the flue tube segments, where operating the heating system outside of the normal heating cycle removes the condensation.

A furnace has a primary heat exchanger tube, a secondary heat exchanger comprising a plurality of secondary heat exchanger tubes, a hot header configured to provide a fluid flow path between an output of the primary heat exchanger tube to an input of the secondary heat exchanger, and a perforated fluid flow plate disposed at least partially within the hot header.

A furnace has a primary heat exchanger tube, a secondary heat exchanger comprising a plurality of secondary heat exchanger tubes, a hot header configured to provide a fluid flow path between an output of the primary heat exchanger tube to an input of the secondary heat exchanger, and a perforated fluid flow plate disposed at least partially within the hot header.

The heat exchange device (200) includes a primary heat exchanger (10), a secondary heat exchanger (20), and a connecting pipe (60). The connecting pipe connects the primary heat exchanger and the secondary heat exchanger. The primary heat exchanger (10) includes a primary heat exchange part (11), a shell plate (12) surrounding the primary heat exchange part, and a body pipe part (13) for cooling the shell plate. The body pipe part (13) is disposed closer to a burner than the primary heat exchange part (11) and is connected to the connecting pipe (60). The primary heat exchange part (11) includes a first heat transfer tube part (111) connected to the body pipe part (13), and a second heat transfer tube part (112) connected to the first heat transfer tube part and disposed on a side opposite to the body pipe part with respect to the first heat transfer tube part.

The heat exchange device (200) includes a primary heat exchanger (10), a secondary heat exchanger (20), and a connecting pipe (60). The connecting pipe connects the primary heat exchanger and the secondary heat exchanger. The primary heat exchanger (10) includes a primary heat exchange part (11), a shell plate (12) surrounding the primary heat exchange part, and a body pipe part (13) for cooling the shell plate. The body pipe part (13) is disposed closer to a burner than the primary heat exchange part (11) and is connected to the connecting pipe (60). The primary heat exchange part (11) includes a first heat transfer tube part (111) connected to the body pipe part (13), and a second heat transfer tube part (112) connected to the first heat transfer tube part and disposed on a side opposite to the body pipe part with respect to the first heat transfer tube part.

An indirect gas-fired condensing furnace assembly and method includes a primary heat exchanger, a secondary heat exchanger, and a tertiary heat exchanger. The secondary heat exchanger assembly may be an intermediate single-pass tubular heat exchange section made from a corrosion-resistant material. The tertiary heat exchanger assembly may be a single-pass tubular heat exchanger section with a corrosion resistant material. The tertiary heat exchanger assembly may include a plurality of fins. The primary heat exchanger assembly may include a plurality of aligned tubes wherein each tube includes a first straight portion, an intermediate portion, and a second straight portion such that the primary heat exchanger tubes surround the secondary and the tertiary heat exchanger assemblies such that the airflow is configured to traverse the primary heat exchanger assembly, the secondary heat exchanger assembly, and the tertiary heat exchanger assembly in various directions such that a risk of condensation freezing within the secondary and tertiary heat exchange assemblies is reduced.

A passive heater for heating a drainage tube, the passive heater including: an elongated flexible thermal conductor including a first end and a second end, wherein the first end is configured to be disposed in contacting relationship with a heat source and at least a portion of the elongated flexible thermal conductor is configured to be disposed in contacting relationship with a portion of the drainage tube; and an eyelet disposed on the first end, the eyelet configured to facilitate the securement of the elongated flexible thermal conductor to the heat source, wherein the first end is configured to receive heat and transmit it along the elongated flexible thermal conductor to increase temperature of the portion of the drainage tube to prevent freezing of a fluid through the drainage tube.