Abstract: An air treatment unit 10 for attachment to a fan coil unit 12 for treating air from an indoor setting, the air treatment unit 10 including: an inlet 14 for connection to a ducting system that receives indoor air; a treatment volume 22 for receiving air flow from the inlet 14; a UV-C light source 24 within the treatment volume 22 for exposing the air in the treatment volume 22 to UV-C radiation; and an outlet 16 for discharge of treated air to the fan coil unit 12, the outlet 16 is configured for connection to an inlet plenum 18 of the fan coil unit 12.

Abstract: An air filtering unit for filtering air from an indoor setting, the air filtering unit including a housing including a first indoor inlet air path and a second indoor inlet air path for receiving indoor air, and an outlet for discharge of filtered air, all indoor air entering the housing must flow through the first indoor inlet air path or the second indoor inlet air path in order to reach the outlet; an indoor damper arrangement including one or more damper elements controllable between at least a first configuration and a second configuration, in the first configuration the first indoor inlet air path is open whilst the second indoor inlet air path is closed to airflow, and in the second configuration the second indoor inlet air path is open whilst the first indoor inlet air path is closed to airflow; a first filter device; a second filter device.

Abstract: An air terminal for a heating or air conditioning system including a housing, a fresh air inlet in the housing to supply a fresh airflow to the air terminal, an outlet diffuser at the housing to allow airflow from the air terminal into a conditioned space, an inlet diffuser located at the housing to allow return airflow from the conditioned space into the air terminal, a coil located in the housing to condition the fresh airflow and/or the return airflow prior to the fresh airflow and/or the return airflow flowing into the conditioned space. A fan is located in the housing to urge return airflow through the inlet diffuser and across the coil. The fan and the inlet diffuser are located at a first side of the coil and the outlet diffuser and the fresh air inlet are located at a second side of the coil opposite the first side.

Abstract: A method and apparatus for controlling an HVAC system. The method may include receiving a fan speed signal from a fan control loop, and choosing among an independent mode, a first linked mode, and a second linked mode, depending on the fan speed signal. The method may also include providing a signal to a pressure control loop to reduce a speed of a supply air fan of an AHU, when the first linked mode is chosen. The method may further include providing a signal to a temperature control loop to decrease a speed of a heat exchange wheel, to decrease a flow rate of a heat exchange fluid to an evaporator coil, or both, when the second linked mode is chosen. The method may additionally include allowing the fan control loop to operate independently of the temperature and pressure control loops, when the independent mode is chosen.

Abstract: A system includes a heat exchanger; a variable actuator in operative communication with the heat exchanger and configured to vary a flow of a first fluid through the heat exchanger in a continuous manner; a discrete actuator in communication with the heat exchanger and configured to vary a flow of a second fluid through the heat exchanger at one of at least two discrete rates; and a controller in communication with the variable actuator and the discrete actuator, wherein the controller is configured to adjust the position of the variable actuator within a range dependent upon a current position of the discrete actuator.

Abstract: An air conditioning system includes a climatic beam located in a room. The climatic beam includes a first portion and a second portion, and a divider located along a length of the climatic beam to separate the first portion from the second portion. The climatic beam further includes a coil supplied with a flow of fluid. A fresh air duct is connected to the first portion to provide a flow of fresh air into the first portion, and a fan is located at the second portion and is configured to draw a flow of primary air across the coil and into the second portion. A beam exit allows a flow of the fresh air and the primary air into the room.

Abstract: An air terminal for a heating or air conditioning system includes a housing and a fresh air inlet in the housing to supply a fresh airflow to the air terminal. An outlet diffuser is located at the housing to allow airflow from the air terminal into a conditioned space. An inlet diffuser is located at the housing to allow return airflow from the conditioned space into the air terminal. A coil is located in the housing through which a heat transfer medium is flowable to condition the fresh airflow and/or the return airflow prior to flowing through the outlet diffuser into the conditioned space. A fan is located in the housing to urge return airflow through the inlet diffuser and across the coil.

Abstract: An air conditioning system includes a climatic beam located in a room. The climatic beam includes a first portion and a second portion, and a divider located along a length of the climatic beam to separate the first portion from the second portion. The climatic beam further includes a coil supplied with a flow of fluid. A fresh air duct is connected to the first portion to provide a flow of fresh air into the first portion, and a fan is located at the second portion and is configured to draw a flow of primary air across the coil and into the second portion. A beam exit allows a flow of the fresh air and the primary air into the room.

Abstract: A heating ventilation and air conditioning (HVAC) system includes a plurality of heating, ventilation and air conditioning (HVAC) units servicing a plurality of zones of a building. A plurality of controllers is connected to the plurality of HVAC units, each controller servicing one or more zones of the plurality of zones. The plurality of controllers include at least one first controller servicing at least one first zone that is powered off when the HVAC system is in a first operating mode and a second controller servicing a second zone of the plurality of zones that remains powered on when the HVAC system is in the first operating mode. The at least one second controller is operably connected to the at least one first controller to enable powering on of the first controller when an environmental condition in the second zone falls outside of a selected range.

Abstract: A method and apparatus for controlling an HVAC system. The method may include receiving a fan speed signal from a fan control loop, and choosing among an independent mode, a first linked mode, and a second linked mode, depending on the fan speed signal. The method may also include providing a signal to a pressure control loop to reduce a speed of a supply air fan of an AHU, when the first linked mode is chosen. The method may further include providing a signal to a temperature control loop to decrease a speed of a heat exchange wheel, to decrease a flow rate of a heat exchange fluid to an evaporator coil, or both, when the second linked mode is chosen. The method may additionally include allowing the fan control loop to operate independently of the temperature and pressure control loops, when the independent mode is chosen.

Abstract: A method of coordinated flow control in a heat exchanger system includes adjusting a position of a variable actuator of the heat exchanger system if an associated monitored temperature of the heat exchanger system needs adjustment, determining if the adjusted position of the variable actuator is within a predetermined range of positions, adjusting a position of a discrete actuator of the heat exchanger system if the adjusted position of the variable actuator is not within the predetermined range of positions, and resetting the position of the variable actuator in response to adjusting the position of the discrete actuator.

Abstract: A method of operating a climatic beam air conditioning system includes operably connecting one or more controllers to two or more climatic beams in two or more locations. Inputs are communicated from the two or more locations to the one or more controllers. Each controller of the one or more controllers is operably connected to two or more climatic beams. Independent commands are communicated to each climatic beam of the two or more climatic beams from the one or more controllers to control operation of the two or more climatic beams based on the inputs communicated from the two or more locations.

Abstract: Sensing, actuation of apparatus, and a control algorithm for use in automatically controlling an air-conditioning system by sensing multiple conditions and responding by actuating the mechanical components of the air-conditioning system to optimize the temperature of the coolant fluid, provide improved zone temperature control, provide status of system components, and provide an alert if there is overheating of a supply side system mechanical component.

Abstract: A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved.

Abstract: A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved.

Abstract: Sensing, actuation of apparatus, and a control algorithm for use in automatically controlling an air-conditioning system by sensing multiple conditions and responding by actuating the mechanical components of the air-conditioning system to optimize the temperature of the coolant fluid, provide improved zone temperature control, provide status of system components, and provide an alert if there is overheating of a supply side system mechanical component.

Abstract: A building air conditioning system control scheme to optimize water terminal capacity and create energy savings by utilizing a building management system signal to run in a mode that maximizes the conditions of the outside air to condition their local zones and potentially require no thermal pre-treatment of outside air by an air handling unit.

Abstract: A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved.

Abstract: An air conditioning system to improve indoor air quality (“IAQ”) comprises an air conditioner to receive indoor air from an indoor space and to heat or cool the air, the air conditioner to then return conditioned air to the indoor space. An IAQ option board (“IOB”), electrically coupled to the air conditioner control board, is configured to accept electrical inputs from at least one IAQ sensor. A fresh air damper is electrically connected to the IOB, the IOB controlling the position of the fresh air damper valve. An air purifier is situated such that air from the indoor space passes through the purifier. The operation of state of operation of the purifier is based at least in part on the input from at least one IAQ sensor to improve the IAQ of the indoor space.

Abstract: A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved.