A combustion device may include a casing including a bottom plate, a combustion unit housed in the casing, and a fan housed in the casing and configured to take in air inside the casing and supply the air to the combustion unit. The bottom plate may be provided with a flat portion and a recess recessed downward from the flat portion. The recess may be provided with a drainage hole and an eave arranged above the drainage hole. The drainage hole may be located below an upper surface of the flat portion. The eave may be at least partially located below the upper surface of the flat portion.

Certain examples of the present disclosure relate to apparatuses and methods for treating a fluid, such as water, when initially introduced into an empty fluid circuit (such as a heating and/or cooling system) via a temporary fluid connection 602 from a fluid supply connector 601; and also for treating existing fluid in a fluid circuit of a heating and/or cooling system. Certain examples provide an apparatus 101 comprising a vessel 102 having an open upper end 103 and a removable lid 108. The vessel includes: a circulating fluid inlet port 104 in a side wall 105 thereof, a circulating fluid outlet port 106 in a lower end 107 thereof, and a combined drain and water inlet port 600 in the lower end 107 thereof.

A manifold (15) comprising a flow chamber (35) for receiving flow heat exchange water from respective heat sources (3, 5, 7) through first inlet ports (47, 48) and from which the flow heat exchange water is delivered to heat exchange circuits (8, 9) through flow ports (57, 58). A return chamber (36) in the manifold (15) for receiving return heat exchange water from the heat exchange circuits (8, 9) through return ports (57, 58), and from which the return heat exchange water is returned to some of the heat sources (3, 5, 7) through first outlet ports (53, 54). A bypass chamber (37) located in the manifold (15) between the flow chamber (35) and the return chamber (36) receives flow water from the flow chamber (35), which has not been drawn off by the heat exchange circuits (8, 9), through a communicating passageway (40). Heat exchange water from the bypass chamber (37) is returned through second outlet ports (55, 56) to others of the heat sources (3, 5, 7).

A water heater including a cabinet having an inlet, an outlet, and a flow path disposed between the inlet and the outlet and having a plurality of upper and lower junctions to redirect the flow path. Each lower junction includes a drain port. A flow rate sensor measures the flow rate of the fluid through the flow path, an inlet temperature sensor measures an inlet temperature, an and outlet temperature sensor measures the outlet temperature. Heating elements are disposed along the flow path between the inlet and outlet temperature sensors, and intermediate temperature sensors are disposed adjacent respective heating elements to measure an intermediate temperature within the flow path. A controller operates the heating elements to heat a fluid within the flow path to a predetermined set point temperature based on the measurements of the flow rate sensor and temperature sensors.

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.

Separator device for separating gas from a liquid flow, including a housing having an inlet and an outlet. The separator device includes a venturi in a liquid flow path extending from the inlet to the outlet. The separator device includes a nozzle in communication with the liquid flow for spraying a part of the liquid of the liquid flow into the housing. The separator device includes a valve for allowing gas to escape from the housing.

The vacuum steam heating system relates to the field of heat power, and specifically to energy saving technologies and is intended for autonomous heating of residential, public, industrial buildings and greenhouses, livestock farms, etc. In order to achieve the high-efficiency transfer of a thermal flow from a source of thermal energy, a vacuum steam method of heat transfer is used in conjunction of a closed evaporation-condensation cycle having a high rate of molar heat transfer via steam, with separate subsystems of condensate return and vacuum-creation and rarification control within the system, with the possibility of installing a heat supply point in a basement variant, floor-mounted variant and roof variant. The system reliability is achieved via the safe and uninterrupted operation, including in the presence of unsatisfactory levels of the system air-tightness (prior to eliminating leaks). The system efficiency reaches 89%, with 38% energy-carrier conservation.

The present disclosure provides a hot water storage tank support system and a water heater pan. In one implementation, the hot water tank support system comprises a water heat pan having a bottom wall, an outer wall extending upwardly from and substantially surrounding the bottom wall, and at least one elevated support feature, and at least one substantially rigid supplemental support component. The at least one elevated support feature is configured to support the hot water storage tank, and the at least one elevated support feature includes at least one supplemental support cavity configured to receive the at least one supplemental support component. In some implementations, the supplemental support component(s) may be insertable and removable from the water heater pan.

A filling loop device is provided to facilitate filling of an installed pressurised heating circuit (2) including a boiler (furnace) (1) from a mains supply pipe (3). The device includes a dead-man valve (14) configured to normally close off a water channel provided by a hose (16). This ensures that the channel can only be opened when attended during charging. Conventionally the hose ordinarily used to charge the heating circuit should be removed after isolation valves are closed at the inlet (4) and outlet (6). However careless operatives have been found to have frequently left the hose in place with the isolation valves open causing serious damage to the boiler.

A second embodiment of the invention includes a pressure regulation valve (25) in the filling loop device to prevent careless operatives charging the system to excessive pressure.

A third embodiment provides a pressure regulation valve in the circuit, normally biased to a closed condition with a dead-man actuator to open the channel.

A drainage tray may be provided for collecting condensate from a heat pump that is adapted to be mounted on a support. The support may be mountable to at least one supporting structure to carry the weight of the heat pump and the support. The drainage tray may include a peripheral edge portion defining a central recessed portion configured to collect condensate. A condensate outlet may be provided for removing the condensate from the tray. The drainage tray may be configured to be arranged between an underside of the heat pump and the support. The drainage tray may have a trapezoidal shape.