Abstract: A method of heating or cooling a room of a building includes providing supplemental warmer or cooler air to the room with an inline duct supplemental heating and cooling device mounted along an air duct that supplies the room with air from a main furnace and/or cooling unit associated with the building. A thermostat is used to set a desired temperature for the room, and a controller of the supplemental heating and cooling device is in communication with the thermostat, and activates an electric heater and/or fan as appropriate to warm or cool the room as needed. When the device is used to cool the room, the fan may be operated to draw cooled air through the duct from the main cooling unit and/or from other areas in the building that are linked via ductwork.

Abstract: An inline duct supplemental heating and cooling device is mounted along an air duct that supplies a room of a building with supplemental warmer or cooler air to the room. The air duct also supplies the room with air from a main furnace and/or cooling unit associated with the building. A thermostat is used to set a desired temperature for the room, and a controller of the supplemental heating and cooling device is in communication with the thermostat, and activates an electric heater and/or fan as appropriate to warm or cool the room as needed. When the device is used to cool the room, the fan may be operated to draw cooled air through the duct from the main cooling unit and/or from other areas in the building that are linked via ductwork.

Abstract: A ventilation system for a building in some cases includes a main HVAC blower for moving temperature-conditioned air through the building plus a smaller ventilation blower for providing fresh air. A controller regulates the ventilation blower's speed to provide a target ventilation flow rate regardless of changes in the pressure differential between the indoor and outdoor air. To ensure that the target rate is appropriate for a particular building, the target flow rate is determined based on a ventilation setting that reflects a specified number of bedrooms and a specified amount of floor space of the building.

Abstract: The ventilation system is a system for ventilating a building and comprises an air supplier/exhauster comprising air supply function and exhaust function and a ventilation control device controlling the operation of the air supplier/exhauster. Upon operating the air supplier/exhauster, the ventilation control device determines which the air supplier/exhauster conducts, air supply operation or exhaust operation, based on wind information regarding the outdoor wind. The ventilation through the ventilation passage from the air supplier/exhauster to a vent provided in the building is conducted when the air supplier/exhauster conducts air supply operation. Alternatively, the ventilation through the ventilation passage from the vent to the air supplier/exhauster is conducted when the air supplier/exhauster conducts exhaust operation.

Abstract: Methods for controlling an economizer of an HVAC system are disclosed. An illustrative control method may include positioning one or more controllable dampers in first and second configurations such that a mixed air stream has first and second mixing ratios of incoming outside air to return air. First and second measures related to the temperature of the mixed air stream may be recorded when the dampers are in each of the first and second configurations. Based on the recorded first and second measures, it may be determined whether and/or how much of the incoming outside air to admit into the economizer via the one or more controllable dampers during subsequent operation of the HVAC system.

Abstract: A system and method for providing a substantially constant volume exhaust or ventilation air terminal system is shown for controlling exhaust and/or return airflow rates in a system having a central fan or ventilator. The system and method permits zone-by-zone or area-by-area airflow regulation or control in non-demand areas in response to a demand or call for ventilation in demand areas. In one embodiment, the system employs at least one constant airflow controller or regulator situated in a damper. In one embodiment, a terminal houses a plurality of sub-ducts each having an airflow regulator. At least one of the sub-ducts has a damper. When the damper is open, a maximum airflow through the terminal is a sum of maximum airflow permitted by the regulators.

Abstract: A method of heating or cooling a room of a building includes providing supplemental warmer or cooler air to the room with an inline duct supplemental heating and cooling device mounted along an air duct that supplies the room with air from a main furnace or cooling unit associated with the building. A thermostat is used to set a desired temperature for the room, and a controller of the supplemental heating and cooling device is in communication with the thermostat, and activates an electric heater and/or fan as appropriate to warm or cool the room as needed. When the device is used to cool the room, the fan may be operated to draw cooled air through the duct from the main cooling unit and/or from other areas in the building that are linked via ductwork.

Abstract: A system for maintaining thermal separation between first and second adjacent rooms or spaces. The system includes a vestibule with at least a first compartment, and other embodiments may include two or more compartments, such that the vestibule provides a passageway between the first and second rooms. At least one blower draws air from the first room through an air intake, and back into the first room through an exhaust. The system further includes an exhaust port from the first compartment in fluid communication with the exhaust, to exhaust air from the first compartment into the first room. During operation, a vacuum is formed within the first compartment that provides thermal separation between the first and second adjacent rooms.

Abstract: In a rack system and a ventilation apparatus, the rack system includes a closed rack, a chassis and a cooling device. The chassis is installed in the closed rack; the cooling device is contained in the closed rack and disposed adjacent and parallel to the chassis; the cooling device and the chassis jointly separate an interior space of the closed rack into a cold air channel and a hot air channel; the cooling device has an air outlet and an air inlet, and the air outlet is corresponsive to the cold air channel, and the air inlet is corresponsive to the hot air channel. The cold air channel and the hot air channel can uniformly dissipate the heat generated by stacked servers inside the chassis, so that the rack system has high energy efficiency.

Abstract: A method of controlling an existing heating, ventilation, and air conditioning system that is configured to condition at least one zone and includes at least one terminal box having a terminal box interface and plurality of control components. The method comprises integrating a control device into said system such that the control device is in communication with the terminal box, terminal box interface, and control components of said system. The control device collects a plurality of zone characteristics, airflow measurements, and occupancy variables, calculates for a primary air freshness based on the plurality of airflow measurements, an outside air requirement based on some of the plurality of zone characteristics and occupancy variables, and a minimum airflow set point by dividing the calculated outside air requirement by the primary air freshness. The control components of said system are modulated based on the calculated minimum airflow set point.

Abstract: An energy recovery ventilator includes first and second blowers, a pressure transducer and a controller. The first blower is configured to direct a first air stream into a first zone of an enclosure. A second blower configured to direct a second air stream into a second zone of the enclosure. A pressure transducer is configured to determine internal air pressure within the enclosure. A controller is configured to control the first blower and/or the second blower in response to the internal air pressure.

Abstract: This invention integrates energy saving lighting with energy saving HVAC (Heating, Ventilating and Air Conditioning). This system is termed by the inventor “ILAC” (Integrated Lighting and Air Conditioning). An ILAC system includes light fixtures mounted in a ceiling and, emitting lamp heat into a plenum and visible light into a room. A central computer controls both lighting and HVAC systems. In a COOL mode an HVAC unit cools the room through a supply air duct and return air duct, and the lamp heat exits the plenum through an exhaust duct. In a HEAT mode the HVAC heats the room through the same supply air duct, a ceiling-to-plenum duct carries the heated room air into the plenum, and an HVAC return air duct carries room and plenum heat back into the HVAC unit that uses less power to heat the lamp-warmed return air. In a thermostat-controlled OFF mode, warm room air convects through the ceiling duct into the plenum and exhausts through a plenum exhaust duct along with lamp-heated plenum air.

Abstract: The invention generally relates to ventilation systems and methods, and more particularly to selectively configurable climate control systems and methods for use in data centers and the like. A device includes a support element and a plurality of ducts connected to the support element. The device also includes a manifold in fluid communication with each one of the plurality of ducts and a plurality of valves. Each respective one of the plurality of valves is associated with a respective one of the plurality of ducts. Moreover, there is at least one actuator operatively connected to the plurality of valves, which is structured and arranged to individually actuate each one of the plurality of valves.

Abstract: The present invention relates to a ventilation arrangement for ventilation of a space (3) in a building, comprising a first chamber (A), a first connection (53) connecting the first chamber to an air supply duct (1003) to allow forced supply of exterior air, a second connection (4) connection the first chamber (A3) and the space (3), and a control system (303). The first chamber (A3) has a third connection (63) allowing supply of recirculated air into the space (3), at least partly via the first chamber (A3), a mechanical ventilation damper (123) to prevent air flowing out from the chamber through the air supply duct (1003), a humidity sensing device (103), a first driven fan (83) arranged at the first connection (53) for supply of exterior air, a second driven fan (93) at the third connection (63) for forced recirculation of air. The control system (303) alternatingly drives the first and the second fan. The humidity sensor measures the relative humidity of exterior air and of recirculated air.

Abstract: A packless silencer for a Venturi control valve being a generally rectangular enclosed housing formed by four side walls and having an intake opening and a discharge opening. Four perforated baffles for each of the side walls are positioned inside of the housing, extend the length of the housing and are offset from the side walls to create an empty baffle space between the perforated baffles and the side walls the ends of the baffle space are covered by end caps.

Abstract: An inline duct supplemental heating and cooling device provides heated and/or cooled air to a room in a building to supplement the heating provided by the existing furnace or the cooling provided by the existing cooling unit in the building. The device includes an electric heater and fan that are activated and deactivated individually by a controller, which receives room temperature data from a thermostat. The device may include one or more separate safety devices to prevent overheating of heater air or of the device itself. Optionally, a vibration-insulating sleeve may be used to couple the device to an existing ventilation duct of the building.

Abstract: In a climate control system for buildings, a number of renewable energy sources (photovoltaic and/or eolic, geothermal and the like) are utilized to obtain a flux of constant temperature fluid to be circulated into radiating pipes placed in continuous spaces or gaps defined in the perimeter walls and floors of said buildings. A desired variable flux of air is made to circulate in said spaces or gaps, to be heated or coiled by said radiating pipes. One said flux of air reaches the desired temperature, its circulation is stopped, to obtain a thermal insulating layer of air, in thermal equilibrium with the rooms to be air conditioned. In the matters of civil, trade, industrial, and also prefabricated buildings endowed with elevated features in heat-sound insulation, it has been utilized a particular simple method for the realization of system of hollow spaces or gaps situated between the outer and inner surface of the building, mainly based on the laying of a series of panels; i.e. thin metal sheets, located.

Abstract: An air management system for an insulated spa cabinet is provided. The air management system monitors the temperature of an equipment air space in the cabinet and vents overheated air in a controlled manner from the cabinet. The air management system comprises an air passageway, formed by a U-trap, between an inlet in the air space and an exterior of the cabinet. The system also comprises an air mover and a sensor. The sensor monitors the temperature in the air space and when the temperature is above a set temperature threshold, the air mover is operated to direct air from the air space through the passageway from the inlet to the discharge for controlled venting of overheated air.

Abstract: In a vehicular air conditioning apparatus, a connection duct connects a first blower unit having a first blower fan to a side of a casing forming air passages, whereas a second blower unit having a second blower fan, different from the first blower unit, is connected to a lower portion of the casing. By driving the first blower fan and second blower fan simultaneously, air is supplied to a vehicle compartment from the first blower unit and the second blower unit through inside the casing. A controller controls the driving of the first blower fan and the second blower fan.

Abstract: A method of dispensing a volatile material comprises the steps of providing power to a volatile material diffuser having a diffusion element. The method further includes the step of operating the diffusion element for a randomly determined period of time, wherein the diffusion element is continuously activated and deactivated during the period of time at a randomly determined duty cycle.

Abstract: A sludge receiving facility is provided with upper and lower structures respectively having inner spaces communicating with each other, wherein sludge tanks each having a sludge charging port are provided in the lower structure, and a partition wall configured to partition a carrying-in space of the upper structure from the inner space is provided, the sludge receiving facility including: outside air blowing means; air circulating means configured to enable the inner space and the carrying-in space to communicate with each other; first exhausting means configured to exhaust air from an upper part of the carrying-in space; second exhausting means configured to exhaust air above the sludge charging port; and third exhausting means configured to exhaust air inside the sludge tanks, wherein opening/closing means are respectively provided in the circulating means and the first to third exhausting means.

Abstract: The present invention provides for a control for activating and deactivating heating, cooling and fan recirculate modes having an interval timer switchable between a timer on (TON) state and a timer off (TOFF) state, both the TON and TOFF state durations are variable according to comparisons between room temperature and a set point temperature of the control and the control activating the fan recirculate mode when the room temperature deviates from the set point temperature of the control. An interval spacer is provided to prevent back to back fan on states.

Abstract: An air circulator for amplifying and manipulating high volumes of low velocity air in order to circulate and regulate indoor air temperature within a commercial or an industrial environment. The air circulator includes a housing and a support member. The housing has an airflow passageway with a bottom end defining an air intake and a top end defining an air outlet. The air circulator further includes a fan positioned within the airflow passageway of the housing substantially adjacent to the top end of the housing. The support member supports the housing so as to dispose the air intake above the ground. The fan and the air outlet are configured to discharge air having a significant vertical component and a significant lateral component.

Abstract: A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units at peak efficiency. The plurality of fan units may be arranged in a true array configuration, a spaced pattern array configuration, a checker board array configuration, rows slightly offset array configuration, columns slightly offset array configuration, or a staggered array configuration.

Abstract: An air-conditioning control apparatus for controlling an air conditioner configured to supply conditioned air into a space to be air-conditioned so that a temperature of a predetermined section in a plurality of sections in the space to be air-conditioned becomes a set temperature, the air-conditioning control apparatus comprising: a detecting device configured to determines the number of people in the predetermined section; and a controller configured to correct the set temperature so as to be decreased if the number of people is increased and so as to be increased if the number of people is decreased.

Abstract: The present invention is directed to a multiple zone climate control system which includes a HVAC unit that supplies conditioned air to more than one zone, a zone controller in each zone, a central controller, one or more air flow rate regulating devices in each zone, and a digital wireless network connecting the air flow rate regulating devices, zone controllers and the central controller. The multiple zone climate control system is capable of energy efficiently regulating temperature in each zone independently as well as providing other air conditioning functions such as humidifying, cleaning and filtering air in each zone independently. The multiple zone climate control system can be installed in a single zone climate control system to convert it into a multiple zone climate control system.

Abstract: An energy management system for managing energy such as power consumed in a building in an optimal state to significantly save energy is provided. A computer control system (200) for controlling the energy management system performs program control as follows. Current date and time are acquired, a control pattern for that time is obtained using a control program, so as to determine whether operation of an air conditioner (186) is to be turned ON or OFF, and then output either an operation instruction or a stop instruction. A control signal is then output from a digital output unit (212) to the air conditioner (186). Thus, the air conditioner (186) temporarily stops operation according to a predetermined pattern for the program control. The current operating state is displayed on a display unit (240) and a remote monitoring unit (270).

Abstract: An arrangement for use in an occupancy-based ventilation system includes a plurality of CO2 sensors and a processing circuit. The plurality of CO2 sensors are disbursed throughout a plurality of spaces in a building. The processing circuit is operably coupled to receive information representative of CO2 measurements generated by the plurality of CO2 sensors. The processing circuit is operable to determine a value corresponding to occupancy, based on information from the CO2 sensors, and to control the flow of fresh supply air into the building ventilation system based on the determined value.

Abstract: The present invention, innovate in a wig stand with holes at its walls and a inner fan positioned to draw fresh air from outside the stand throughway inside of the stand through a holes in the walls of the stand in order to pass through the wig hairs placed on the stand. Fan could be suspended in hollow of wig stand or in sidewall of lower portion of wig stand. The inner parts of the stand have an access to the user, for the purpose of parts treatments. The wig stand is optionally connected to system that controlled the fan operation, and optionally makes it a safe to be operated in the day of Shabbat for the religious Jewish people.

Abstract: A system for controlling the temperature of a rack includes a connecting plenum configured to receive incoming cooling air from outside a rack for cooling the rack; a front plenum connected to the connecting plenum and configured to receive cooling air from the connecting plenum and deliver the cooling air to the rack, the cooling air being warmed by powered electrical components as it passes through the rack; at least one ventilator for recycling warmed cooling air from the rack back to the connecting plenum to be mixed with incoming cooling air; a sensor for sensing temperature of air in the rack; and a controller for controlling the at least one ventilator based at least on the sensed temperature.

Abstract: An air conditioning apparatus including a heater or furnace includes a controller for receiving control signals from a thermostat and from a user interface for initiating a contingency mode of operation when a signal from the thermostat is not available. The user interface includes a visual display and multiple keys for entering the contingency mode which includes selecting a capacity of heat output of the apparatus and a duty cycle. The user interface may be disposed in the apparatus cabinet and connected directly to a microprocessor based controller for the apparatus. The contingency mode is automatically aborted if a fault signal is received by the controller, a signal is received from a thermostat or power to the apparatus is interrupted.

Abstract: A method of constant airflow control for a ventilation system is disclosed. The method includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant I·RPM control, which is primarily used in a low static pressure range. Another control is a constant RPM control, which is primarily used in a high static pressure range. These controls requires neither a static pressure sensor nor an airflow rate sensor to accomplish substantially constant airflow rate while static pressure changes. This is because these controls use only intrinsic control variables which are electric current and rotational speed of the motor. Also, the method improves the accuracy of the control by correcting certain deviations that are caused by the motor's current-RPM characteristics. To compensate the deviation, the method adopts a test operation in a minimum static pressure condition.

Abstract: A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.

Abstract: A battery operated smoke detection and smoke extraction system for use within a building with walls and ceilings. The system detects the presence of smoke, and provides means to contain fires within the area of origination. The system feeds positive airflow to a fire by extracting smoke into a dedicated ductwork system, whereby it is exhausted outside through the building envelope in a confined manner. The system decreases the possibility of fire back draft occurring. The system is comprised of a modified smoke detector, which activates a fan installed in a multi port manifold. Individual dedicated ducts, each serving individual rooms, are connected to the manifold. Each duct has a ceiling mounted back draft damper, for energy efficiency. The manifold is provided with a chimney and a decorative spark arrestor chimney termination. The system is powered by means of rechargeable batteries within a fireproofed recharging receptacle.

Abstract: A system for providing outside air to a space for dilution of contaminants within the space. The system includes an air handler that supplies a flow of outside air to the space and an occupancy detector that calculates the occupancy of people in the space. Also included is a processor that determines a flow rate set point for the outside air for the space based on the occupancy in the space, the floor area of the space, and the flow of outside air supplied by the air handler. An air flow controller is provided that modulates the air flow from the air handler to the space. An open protocol network is connected to the air handler, the occupancy detector, and the air flow controller, and the processor dynamically calculates the outdoor air flow rate set point.

Abstract: A clean room unit which is equipped with a work room and a clean bench unit can be independently installed inside a building, can generate an air shower in the work room, and can realize miniaturization and cost reduction. The clean room has a work room, a clean bench unit which has a work opening and has the work opening installed to look onto the work room, an air conditioning system which can perform purification and pressure control of air inside the work room and the clean bench unit and can generate an air shower in the work room, and a control unit. The air conditioning system is controlled by the control unit to switch exclusively between the air shower mode, the ventilation mode, the positively-pressurized work mode, and the negatively-pressurized work mode.

Abstract: An auxiliary cooling system is provided, which can be driven by hydraulic power and can be capable of actuating ventilation fans, normally operated by electrical power, when electrical power becomes unavailable, or when electric motors become inoperable. This system can be used as part of a method, wherein voltage can be detected by detectors and transmitted to a monitoring unit. The monitoring unit can make automatic decisions, based on the received detections, concerning whether to turn on or off backup electrical generators, and whether to turn on or off the hydraulic auxiliary cooling system.

Abstract: The invention presents a ventilator capable of obtaining an optimum flow rate required in ordinary ventilation. The ventilator comprises an exhaust fan motor for exhausting room air by force, and a human sensor for detecting the presence of human body. It further comprises a control unit for controlling the fan motor by receiving a signal from the human sensor, and a flow rate adjusting unit for adjusting the ventilation flow rate by the exhaust fan motor. The control unit, when detecting a signal from the human sensor, operates the exhaust fan motor for a specified time at fixed flow rate, and while not detecting, it operates the exhaust fan motor all the time at ventilated flow rate adjusted by the flow rate adjusting unit. During this ordinary operation, the flow rate may be adjusted by the flow rate adjusting unit either steplessly or in multiple steps at small intervals, and thereby a ventilator capable of obtaining an optimum flow rate required in ordinary ventilation can be presented.

Abstract: Methods for preventing exhaust backflow into a blower are disclosed. Embodiments may include a blower system with an invertible blower chassis having a blower exhaust to direct airflow from the blower chassis at an airflow angle. The system may also include a backflow damper frame attached to the blower chassis and positioned to receive airflow from the blower chassis and one or more vertical damper vanes rotatably attached to the backflow damper frame. Each damper vane may freely rotate between a first, closed position and a second, open position. The damper vanes may block airflow into the blower exhaust when in the closed position and may freely rotate to a position where the damper vanes are substantially parallel to the airflow from the blower exhaust. The damper vanes may each include a vane pin to rotatably attach to frame holes of the backflow damper frame.

Abstract: A system for controlling multiple air conditioners. The system includes a demand control unit configured to divide the multiple air conditioners into groups, to assign a priority level to each group, to calculate an estimated power amount used by the multiple air conditioners based on an amount of power consumed by the multiple air conditioners during a predetermined time period, and to forcibly control an operation of one or more air conditioners included in a respective group based on the priority level assigned to the respective group.

Abstract: The described method and apparatus pertains namely to the HVAC (Heating, Ventilating, and Air Conditioning) industry, though its many functions extend into any and all forms of air-fluid movement, metering, distribution, and containment. Essentially, the scope of operation of the method and apparatus encompasses all forms of scientific and engineering measurement dealing with fluid dynamics, fluid statics, fluid mechanics, thermal dynamics, and mechanical engineering as they pertain to precise, articulated control of air-fluid distribution and delivery. The described method and apparatus offers complete, comprehensive, and correct utilization of air-fluid movers and terminal devices under unique sensor logic control, from initial lab testing stages through to equipment cataloguing, selection, design and construction of any and all air-fluid distribution systems in entirety, whereas previously there was no such cohesive, total and terminal method of control for these systems or their components.

Abstract: The present invention relates to a ventilated seat having an insert with a seat portion, and having a flow control layer with first and second ports, a spacer having an inlay and a main portion, and a first fluid barrier where the inlay is substantially isolated from the main portion by a fluid-tight boundary. The present invention also relates to a ventilated seat having an insert with a seat portion and having a first flow control layer with at least one port, a first and a second spacer, and a fluid barrier comprising at least one port. The present invention also relates to a ventilated seat with an insert having a seat portion and having a flow control layer with a port and a plurality of flow holes in the seat portion, a spacer, a fluid barrier and at least one conduit with a plurality of flow holes located adjacent to the seat portion of the flow control layer. The seat also may include a fan in fluid communication with the spacer and a fluid conditioning device.

Abstract: An attic heat reclaimer intended for the recovery of heated air in the attic of houses and other such structures. The unit works on differential air pressure. The unit includes an enclosure having at least one side wall, and being open to airflow at the top and bottom thereof. The vertically operational barometric air reclaimer further includes a barometric damper plate rotatably disposed on a fulcrum within the enclosure. The fulcrum is connected to the barometric damper plate such that the fulcrum is not disposed at the geometric centerline of the barometric damper plate. The barometric damper plate is weighted on one end so as to balance the barometric damper plate in a generally horizontal, closed position when the air pressure above and below unit is equal.

Abstract: A totally integrated ventilation system is contained in the outside air inlet stream. The system samples and controls ventilation airflow as it enters a structure. An air valve connecting the outside air inlet stream to the return plenum is controlled by a valve positioning device and a processor that monitors sensors located in the outside air inlet stream, air quality data provided by a telecommunications link and the HVAC system control signals. The air quality data includes locally broadcast air pollution data or air quality alert data related to accidents or terrorist attacks. The processor and valve positioning device simultaneously control a separate pressure relief valve that allows contaminated air to be exhausted from the structure. An alternate configuration uses a supplemental fan to introduce the outside air inlet stream directly into the structure where HVAC systems are not used.

Abstract: When a prior-art transmission scheme is to be applied to an airconditioning equipment already installed in a building or a house, refrigerant pipes serving as communication media and an in-room unit as well as an out-room unit need to be insulated, so that steel pipes near both the ends of each refrigerant pipe have been inevitably replaced with electrical insulation devices. (Means for Resolution) An airconditioning equipment having an in-room unit 2 connected to one end of refrigerant pipes 3, 4, and an out-room unit 1 connected to the other end of the refrigerant pipes 3, 4, is characterized by comprising signal coupling portions 7 which are respectively disposed at both the end parts of the refrigerant pipes 3, 4, each of which couples an AC control signal to the refrigerant pipes 3, 4, and each of which exhibits a predetermined impedance with respect to an AC electric signal.

Abstract: A building's Heating Ventilating and Air Conditioning (HVAC) system is made more energy efficient and the indoor air quality (IAQ) of the building's circulating air is improved by incorporating a greenhouse as an integral part of the HVAC system and by utilizing a novel feed forward control strategy that maintains the proper levels of temperature, humidity and CO2 concentration in the building under varying conditions of day, time, use and occupancy. A portion or all of the exhaust air from the building is discharged into a greenhouse where the heat and humidity are recovered in the winter by heating the greenhouse and the air conditioning is recovered in the summer by cooling the greenhouse. Selected plants are used in the greenhouse to remove CO2 and pollutants from the building's exhaust air while enriching the air with oxygen and beneficial negatively charged ions.

Abstract: A cabinet combination section has a ventilation device. The ventilation device has a first air duct for conditioning outdoor air and supplying the conditioned air as supply air to a room and a second air duct for removing return air from the room and discharge the return air as exhaust air to the environment. The ventilation device comprises various components including a fan. The components are situated in the first air duct and/or in the second air duct. The cabinet combination section has a lower section, a middle section and an upper section lying on top of another. The components of the ventilation device are situated in the lower section and/or the upper section of the cabinet combination section.

Abstract: An air cleaner and method of controlling an operation of the same is disclosed. The air cleaner includes a cabinet having an inlet and an outlet; a filter assembly removing dust and smell particles from a room air; a fan; a sensor assembly sensing the composition of the room air; a supplier assembly providing at least one of insufficient components of the room air to a cleaned air; and a controller controlling the supplier assembly on the basis of data regarding the composition of the room air. In another aspect, the method of controlling the operation of the air cleaner includes steps of sensing a room air; measuring insufficient components of the room air and the amount thereof; and providing at least one of the insufficient components of the room air to a cleaned air.

Abstract: A vehicle safety system automatically detects the presence of a person sealed in the trunk of an automobile by sensing the CO2 respiration of the person. Visible, audio and radio alarms are generated in response to the detection of a person in the trunk. If the vehicle is stopped, the trunk will automatically open and allow the person to escape.

Abstract: A space conditioning system for a building including production and occupied spaces provides precise control of exhaust and space conditioning equipment by taking into account multiple conditions and by using predictive control. The control method and system are illustrated by a commercial kitchen ventilation application.