Abstract: A modular exhaust configured for exhausting a flue flow of a heat exchanger, the modular exhaust including a cross tube including an inlet end, an exit end and a central axis, wherein the cross tube configured for receiving the flue flow at the inlet end and channeling the flue flow to the exit end; a condensate drainage exit aperture disposed on a bottom portion of the cross tube, the condensate drainage exit aperture configured for draining condensate from the first heat exchanger; and a vertical tube including a central axis, a top end and a bottom end, the cross tube configured to be connected at the exit end of the cross tube to a portion of the vertical tube disposed between the top end and the bottom end, the central axis of the cross tube is not disposed perpendicularly with respect to the central axis of the vertical tube.

Abstract: A system for heating a first fluid flow from a first temperature to a second temperature, the system including a hot water supply line for receiving the first fluid flow at a first end and exhausting the first fluid flow at a second end; and a heating system including a heat engine, a thermal battery and a heat exchanger, wherein the thermal battery is configured to be replenished at a point of heat transfer by the heat engine and the hot water supply line is configured to receive heat from the thermal battery via the heat exchanger to elevate the temperature of the first fluid flow from the first temperature to the second temperature.

Abstract: A thermal recovery device for recovering waste heat from a sink having a bottom plate, the bottom plate having a top surface and a bottom surface, wherein the bottom plate being a thermal conductor, the thermal recovery device including: a tube including an inlet and an outlet, the tube thermally connected to the bottom surface, wherein thermal communication exists between the top surface and a fluid in the tube, a demand for the fluid causes the fluid to flow through the tube and heat transfer to the fluid which raises the temperature of the fluid prior to entering a heater and subsequently arriving at the top surface of the bottom plate of the sink from which the heat is transferred, reducing the heating load of the heater due to the demand of the fluid.

Abstract: A method for determining a failure mode of a comfort device, the method includes obtaining a first input during a first operation of the comfort device, wherein the first operation is a known normal operation; classifying the first input into a class including a series of attributes and storing the first input in a database of input classes; obtaining a second input during a second operation of the comfort device; and classifying the second input into a class including a series of attributes and comparing the class of the second input to the class of the first input in a first comparison, wherein if a match exists, comparing the series of attributes of the second input to the series of attributes of the first input in a second comparison, wherein if a discrepancy is detected, a warning is raised.

Abstract: A heat exchanger including more than one fluid conductor, each of the fluid conductors is configured to receive a distinct flow of fluid and heat from only one heat source, wherein the coils are configured to be interleaved to form a structure of a single-sized lumen in which the heat source is disposed.

Abstract: A zero pressure drop water heating system comprising a cold side conductor having a receiving end and a closed end; a hot side conductor having an exit end and a closed end; a pump; a bypass conductor having a first end, a second end and a bypass valve, wherein the first end is adapted to the receiving end and the second end is adapted to the exit end; at least one heat exchanger having a flow valve; a heat exchanger inlet temperature sensor disposed on the inlet of one of the at least one heat exchanger; an outlet temperature sensor disposed at an outlet of the at least one heat exchanger closest to the exit end; a system outlet temperature sensor disposed on the exit end and a system inlet temperature sensor disposed on the receiving end.

Abstract: An enclosure for a water heating system for a service selected from the group consisting of receiving water through a water inlet port, recirculating water through a recirculation port, outputting a heated water supply through a water outlet port, receiving a gas supply through a gas inlet port, receiving an air supply through an air inlet port and a combustion exhaust through an exhaust port, the enclosure including a wall through which at least one of the water inlet port, the recirculation port, the water outlet port, the gas inlet port, the air inlet port and the exhaust port is disposed, the wall is configured to be removable for access to equipment disposed inside the enclosure, the equipment is connected to the at least one of the water inlet port, the recirculation port, the water outlet port, the gas inlet port, the air inlet port and the exhaust port.

Abstract: A method for controlling a system including a heat pump, a space heater, space cooler, a thermal battery, an electrical battery and a grid access system, including: turning on at least one of the heat pump, charging of the thermal battery, discharging of the thermal battery, charging of the electric battery and discharging of the electric battery if a hot water demand exists; turning on at least one of the water heater, charging of the thermal battery, discharging of the thermal battery, charging of the electric battery and discharging of the electric battery if a space heating demand exists; turning on at least one of the water heater, charging of the thermal battery, charging of the electric battery and discharging of the electric battery if a space cooling demand exists; and backfeeding electricity from the electric battery to a grid through the grid access system if electricity sale is desired.

Abstract: A present heating system or heating and cooling system does not include a tank for storing potable hot water in anticipation of a potable hot water demand. As such, no stratification of potable water held in a tank can occur. Although one or more temperature sensors may be used for providing feedback to heating of the contents of a tank water heater to achieve a setpoint temperature, the effect of stratification can cause layers of fluid having different temperatures in the tank water heater. Therefore, although portions of the contents of a water heater may be disposed at a setpoint temperature that is unfavorable for Legionella proliferation, there potentially exists other portions that may be disposed at temperatures suitable for Legionella proliferation, especially when the contents have been left unused for an extended period of time.

Abstract: A method for controlling ozonation in a water supply system including an ozonator, a controller functionally connected to the ozonator, a flow meter configured for detecting a flowrate through the water supply system, a valve configured for turning on or off of the water supply system, the method including using the controller for; determining at least one event from flowrate data of the flow meter over a time period of a plurality of days, the at least one event including a time span of a day in which the flowrate remains below or at a threshold value over the time span of a day within each day of the plurality of days; determining overlaps of the at least one event of all days within the time period; determining a frequency of the overlaps of the at least one event over the time period and determining a requirement for ozone.

Abstract: A sanitizing system for sanitizing a water flow at a point of use, the sanitizing system including an ozone demand indicator configured for determining the existence of a demand for ozone in the water flow; an ozone generator configured to be disposed no more than about 72 inches upstream of the point of use on a fluid conductor supplying the water flow at the point of use, wherein ozone generated by the ozone generator is configured to be disposed in the water flow to sanitize the water flow; and a control device operable to control the ozone demand indicator and the ozone generator responsive to the ozone demand indicator, wherein the control device is configured to cause the ozone generator to start generating ozone upon receiving an indication from the ozone demand indicator that the demand for ozone exists.

Abstract: A heating system including a water conductor, a valve configured to cooperate with a fluid moving device which together operable to selectively circulate a heat transfer fluid in at least one of a first fluid circuit and a second fluid circuit, a heat exchanger and a blower operable to supply a stream of fluid over the heat exchanger, wherein the heat exchanger is fluidly connected to the first fluid circuit, wherein the heat exchanger being disposed to transfer heat between the heat transfer fluid and the heat exchanger, a coil fluidly connected to the second fluid circuit, wherein the coil is configured to be disposed on a drainage tube to transfer heat between the heat transfer fluid and the coil, a final heat exchanger configured for thermally coupling the first fluid circuit and the water conductor and the second fluid circuit and the water conductor.

Abstract: 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.

Abstract: 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.

Abstract: A device including: a sensor for monitoring a pressure of a fluid system to produce pressure signals over a period; and a controller configured for: receiving the pressure signals over the period; establishing an operating pressure zone corresponding to the pressure signals over the period, the operating pressure zone is representative of a normal operation zone of the fluid system, the normal operation zone defined by an area bounded by a low pressure level and high pressure level, wherein the high pressure level is disposed at a level at least at a maximum pressure of the pressure signals over the period and the low pressure level is disposed at a level at most at a minimum pressure of the pressure signals over the period.

Abstract: 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.

Abstract: A fitting including a main tube including a central axis, a first end and a second end; a branch tube including a central axis, a first end and a second end, wherein the branch tube extending at the first end of the branch tube from the main tube in a first direction between the first end and the second end of the main tube to the second end of the branch tube; a first sub-tube extending from the main tube between the first end and the second end of the main tube in a second direction.

Abstract: A structure for detecting a leak, wherein the structure is supported upon a supporting surface, the structure including a leak detector; and a bottom-facing surface comprising an inverted depression in which the leak detector is disposed, the inverted depression is configured to be suitable for inducing capillary actions in a liquid collected on the supporting surface, wherein when the inverted depression comes in contact with the liquid at its periphery, the liquid is drawn to the leak detector to be detected.

Abstract: A modular exhaust configured for exhausting a flue flow of a heat exchanger, the modular exhaust including a cross tube including an inlet end, an exit end and a central axis, wherein the cross tube configured for receiving the flue flow at the inlet end and channeling the flue flow to the exit end; a condensate drainage exit aperture disposed on a bottom portion of the cross tube, the condensate drainage exit aperture configured for draining condensate from the first heat exchanger; and a vertical tube including a central axis, a top end and a bottom end, the cross tube configured to be connected at the exit end of the cross tube to a portion of the vertical tube disposed between the top end and the bottom end, the central axis of the cross tube is not disposed perpendicularly with respect to the central axis of the vertical tube.

Abstract: An enclosure for a water heating system for a service selected from the group consisting of receiving water through a water inlet port, recirculating water through a recirculation port, outputting a heated water supply through a water outlet port, receiving a gas supply through a gas inlet port, receiving an air supply through an air inlet port and a combustion exhaust through an exhaust port, the enclosure including a wall through which at least one of the water inlet port, the recirculation port, the water outlet port, the gas inlet port, the air inlet port and the exhaust port is disposed, the wall is configured to be removable for access to equipment disposed inside the enclosure, the equipment is connected to the at least one of the water inlet port, the recirculation port, the water outlet port, the gas inlet port, the air inlet port and the exhaust port.