An induction displacement unit comprising an induction plenum comprising a plurality of first nozzles communicating with a first discharge plenum and a plurality of second nozzles communicating with a second discharge plenum, a return air plenum, a heating coil disposed between the return air plenum and the first discharge plenum, a cooling coil disposed between the return air plenum and the second discharge plenum, the induction plenum vertically disposed between the heating coil and the cooling coil, the heating coil disposed in an upper portion of the unit, the first discharge plenum disposed to induce a substantially vertical discharge, and the second discharge plenum disposed to induce a substantially horizontal discharge.

An induction displacement unit comprising an induction plenum comprising a plurality of first nozzles communicating with a first discharge plenum and a plurality of second nozzles communicating with a second discharge plenum, a return air plenum, a heating coil disposed between the return air plenum and the first discharge plenum, a cooling coil disposed between the return air plenum and the second discharge plenum, the induction plenum vertically disposed between the heating coil and the cooling coil, the heating coil disposed in an upper portion of the unit, the first discharge plenum disposed to induce a substantially vertical discharge, and the second discharge plenum disposed to induce a substantially horizontal discharge.

A water distribution apparatus and method including cold and hot water supplies, a fan coil (or chilled beam device), a control valve having cold and hot water inlets and outlets, cold and hot water outputs configured to supply cold and hot water to the fan coil, cold and hot water return inlets configured to receive from the fan coil the water supplied by the cold and/or water outputs and outputting the cold and/or hot water to the cold and hot water supply lines, respectively, via the cold and hot water outlets, respectively. Cold and hot water is supplied from the cold and/or hot water outputs to the fan coil and received into the cold and hot water return inlets, respectively, and the cold and hot water supplied by the cold and hot water outputs to the fan coil is output to the cold and hot water supply lines, respectively.

A water distribution apparatus and method including cold and hot water supplies, a fan coil (or chilled beam device), a control valve having cold and hot water inlets and outlets, cold and hot water outputs configured to supply cold and hot water to the fan coil, cold and hot water return inlets configured to receive from the fan coil the water supplied by the cold and/or water outputs and outputting the cold and/or hot water to the cold and hot water supply lines, respectively, via the cold and hot water outlets, respectively. Cold and hot water is supplied from the cold and/or hot water outputs to the fan coil and received into the cold and hot water return inlets, respectively, and the cold and hot water supplied by the cold and hot water outputs to the fan coil is output to the cold and hot water supply lines, respectively.

An air conditioning system (1) has a heater unit (3) providing a hot water flow (7) and receiving a hot water return (31) in hot water loop, a chiller unit (5) providing a cold water flow (13) and receiving a cold water return (33) in a cold water loop, one or more air to water heat exchangers (17), and one or more control valves (11), each control valve (11) associated with one of the air to water heat exchangers (17) and arranged to receive the hot water flow (7) and cold water flow (13), selectively provide the flow from a one of the hot water loop or cold water loop to the associated air to water heat exchanger (17), receive a return from the associated air to water heat exchanger (17), and selectively provide the return from the associated air to water heat exchanger (17) to the return of the one of the hot water loop or cold water loop.

An air conditioning system (1) has a heater unit (3) providing a hot water flow (7) and receiving a hot water return (31) in hot water loop, a chiller unit (5) providing a cold water flow (13) and receiving a cold water return (33) in a cold water loop, one or more air to water heat exchangers (17), and one or more control valves (11), each control valve (11) associated with one of the air to water heat exchangers (17) and arranged to receive the hot water flow (7) and cold water flow (13), selectively provide the flow from a one of the hot water loop or cold water loop to the associated air to water heat exchanger (17), receive a return from the associated air to water heat exchanger (17), and selectively provide the return from the associated air to water heat exchanger (17) to the return of the one of the hot water loop or cold water loop.

An HVAC system is provided. Embodiments of the present disclosure generally relate to heat exchangers having tubing with a reduced diameter compared to traditional systems. In one embodiment, a ducted HVAC system comprises an outdoor heat exchanger with tubing that has an outer diameter of eight millimeters (8 mm) or less and an indoor heat exchanger with tubing that has an outer diameter of nine millimeters (9 mm) or less. Additional systems, devices, and methods are also disclosed.

An HVAC system is provided. Embodiments of the present disclosure generally relate to heat exchangers having tubing with a reduced diameter compared to traditional systems. In one embodiment, a ducted HVAC system comprises an outdoor heat exchanger with tubing that has an outer diameter of eight millimeters (8 mm) or less and an indoor heat exchanger with tubing that has an outer diameter of nine millimeters (9 mm) or less. Additional systems, devices, and methods are also disclosed.

A fault detection system for detecting a flow restriction in an air handler is provided. The system includes a coil, air and liquid temperature sensors, a smart valve and a notification device. The coil is located in an air stream of the air handler. The air temperature sensors are located in the air stream, one sensor determining an air temperature of air upstream of the coil and another determines an air temperature downstream of the coil. The liquid temperature sensors determine a liquid temperature entering the coil and exiting the coil. The smart valve includes a controller in communication with the liquid temperature sensors and at least one of the air temperature sensors that uses the measured air temperature downstream of the coil and a valve actuator position to determine whether the coil is operating at a reduced capacity. The notification device communicates with the controller of the smart valve.

A fault detection system for detecting a flow restriction in an air handler is provided. The system includes a coil, air and liquid temperature sensors, a smart valve and a notification device. The coil is located in an air stream of the air handler. The air temperature sensors are located in the air stream, one sensor determining an air temperature of air upstream of the coil and another determines an air temperature downstream of the coil. The liquid temperature sensors determine a liquid temperature entering the coil and exiting the coil. The smart valve includes a controller in communication with the liquid temperature sensors and at least one of the air temperature sensors that uses the measured air temperature downstream of the coil and a valve actuator position to determine whether the coil is operating at a reduced capacity. The notification device communicates with the controller of the smart valve.