A water heater includes a tank defining an interior space adapted to contain water and a shroud over the water heater and defining a component space inside the shroud. A first pipe nipple is coupled to a spud of the water heater, the first pipe nipple and spud defining a non-collinear axis that is non-collinear with a pipe axis of a pipe to be fluidly connected to the tank. A flexible connector is connected at one end to the first pipe nipple along the non-collinear axis. A second end of the flexible connector is positioned collinear with the pipe axis. A second pipe nipple is coupled at one end to the second end of the flexible connector and coupled at an opposite end with the pipe. Fluid communication is established between the pipe and the interior space of the tank through the pipe nipple and flexible connector.

A water heater fixing assembly includes a pair of upper column members, a pair of lower column members, a pair of lower column members, a first pipe stay, a second pipe stay, and a first copper pipe. The pair of upper column members are laterally disposed with each other. The pair of lower column members are disposed below the pair of upper column members and laterally disposed with each other. A vertical projection of the first pair of the water heaters is not overlapped with a vertical projection of the second pair of the water heaters. A first pipe stay is protruded from the pair of upper column members and extended below the first pair of the water heaters. A second pipe stay is protruded from an installation side of the pair of lower column members and extended below the second pair of the water heaters.

A water heater fixing assembly includes a pair of upper column members, a pair of lower column members, a pair of lower column members, a first pipe stay, a second pipe stay, and a first copper pipe. The pair of upper column members are laterally disposed with each other. The pair of lower column members are disposed below the pair of upper column members and laterally disposed with each other. A vertical projection of the first pair of the water heaters is not overlapped with a vertical projection of the second pair of the water heaters. A first pipe stay is protruded from the pair of upper column members and extended below the first pair of the water heaters. A second pipe stay is protruded from an installation side of the pair of lower column members and extended below the second pair of the water heaters.

An apparatus comprises a sensor circuit configured to detect activation of at least one circulator arranged to circulate liquid from a boiler through at least one circulation loop and back to the boiler. An analog up/down timer circuit has an input coupled to an output of the sensor circuit and generates a variable threshold signal that varies as a function of an activation time of the at least one circulator. A burner control circuit receives the variable threshold signal from the analog up/down timer circuit and generates an ignition control signal based at least in part on comparison of a temperature sensor signal of the boiler with the variable threshold signal. An ignition driver receives the ignition control signal from the burner control circuit and generates an ignition signal for a burner configured to burn fuel to heat the liquid in the boiler based at least in part on the ignition control signal.

The purpose of the present invention is to provide a heat exchanger which minimizes pressure drops of the heating medium by allowing smooth circulation of same along the heating medium channels formed between plates, improves the efficiency of heat exchange by preventing localized overheating, and which additionally facilitates the production of the heat exchanger. The present invention comprises a heat exchange part having heating medium channels, through which heating medium flows, and combustion gas channels, through which combustion gas burned in a burner flows, adjacently disposed in alternation in the spaces between the plurality of plates, wherein the heat exchange part surrounds the outer sides of a central combustion chamber space, a plurality of the heat exchange parts are provided in a stacked structure, and the flow direction of the heating medium is unidirectional only in a part of the heating medium channels from among the heating medium channels provided in each layer.

Steam cylinders for humidifies require periodic replacement as well as replacement to address failures etc. However, field replacement of steam cylinders is not a straight-forward operation and there is significant risk and potential for damage to the replacement cylinder and the humidifier as fluidic seals for the water inlet and steam outlet must be unmade as well as electrical connections for heater elements, level sensors etc. Accordingly, embodiments of the invention provide solutions for the deployment of replacement cylinders etc. for domestic, retail, and commercial systems that reduce the likelihood of damage to the fluidic seals, electrical connectors etc.

Steam cylinders for humidifies require periodic replacement as well as replacement to address failures etc. However, field replacement of steam cylinders is not a straight-forward operation and there is significant risk and potential for damage to the replacement cylinder and the humidifier as fluidic seals for the water inlet and steam outlet must be unmade as well as electrical connections for heater elements, level sensors etc. Accordingly, embodiments of the invention provide solutions for the deployment of replacement cylinders etc. for domestic, retail, and commercial systems that reduce the likelihood of damage to the fluidic seals, electrical connectors etc.

A heat exchanger comprising a mixture inflow unit into which a mixture of air and fuel is introduced, a burner for combusting the mixture introduced through the mixture inflow unit, a heat exchange unit that is disposed around the burner, and a combustion gas discharge unit for discharging the combustion gas having passed through the heat exchange unit is provided.

A pipe nipple insert and dip tube for use with a water heater having a pipe nipple, the dip tube including a pipe nipple insert and a tubular body. The pipe nipple insert includes an outer wall and a plurality of annular crush rings extending radially from the outer wall. An overlapping connection is included at a bottom of the pipe nipple insert and a top of the tubular body for connecting the bottom of the pipe nipple insert to the top of the tubular body, wherein either the bottom of the pipe nipple insert overlaps the top of the tubular body or the top of the tubular body overlaps the bottom of the pipe nipple insert.

A water heater includes a tank defining an interior space adapted to contain water and a shroud over the water heater and defining a component space inside the shroud. A first pipe nipple is coupled to a spud of the water heater, the first pipe nipple and spud defining a non-collinear axis that is non-collinear with a pipe axis of a pipe to be fluidly connected to the tank. A flexible connector is connected at one end to the first pipe nipple along the non-collinear axis. A second end of the flexible connector is positioned collinear with the pipe axis. A second pipe nipple is coupled at one end to the second end of the flexible connector and coupled at an opposite end with the pipe. Fluid communication is established between the pipe and the interior space of the tank through the pipe nipple and flexible connector.