Matches 1 - 50 out of 103 1 2 3 >
Match Document Document Title
7551983 Variable air volume system including BTU control function  
A method, as well as a controller, for controlling room temperature within a variable air volume system having a plurality of zones wherein the thermal transfer rate with respect to each of such...
7478761 Self-contained ventilation flow control system  
A preassembled flow control unit includes a plenum, a flow controller mounted to the plenum, and a flow control sensor mounted to the plenum. An isolation valve selectively blocks the flow of air...
7448435 System and method for controlling a multi-zone heating or cooling system  
A control system is provided for automatically setting up and controlling a climate control system for a building having one or more zones and one or more thermostats in communication with the...
7334632 Variable volumetric flow heat exchanger for an air-to-air heat recovery system  
A variable volumetric flow heat exchanger for a building air-to-air heat recovery system that is operable at a high volumetric flow rate and at a low volumetric flow rate. The heat exchanger...
7261241 Heating and cooling energy saving device  
A system for regulating the temperature of multiple areas within a facility using multiple energy savings devices (ESD) that each regulate the temperature of individual rooms or areas within a...
7063140 Multiple climate air system  
The present invention 10 discloses a climate control system for a dwelling 12 comprised of main air conditioning unit 36 and a plurality of thermostats 14 and vents 16 . Each of the...
7017827 Method and system for automatically optimizing zone duct damper positions  
A control is functional to perform a method of determining a maximum desired airflow for each of a plurality of zones in a multi-zone HVAC system, and an expected airflow to those zones. In part,...
7003377 Controlling cooling air intake for air cooled equipment  
A method and apparatus for supplying cooling air to electronic equipment from ones of at least two sources. A detector detects whether the quality, such as the temperature of the cooling air from a...
6929062 Air-conditioning apparatus  
An air-conditioning apparatus regulates at least the temperature of at least one room to a predetermined temperature desired value (T RAUM SOLL ) by ventilation with heated or cooled supply air....
6915650 Vehicle air conditioner with automatic control of main blower and sub-blower  
A vehicle air conditioner includes a main blower and a sub-blower for blowing air into a passenger compartment. The main blower is disposed to blow conditioned air in a front air passage toward a...
6792766 Zone demand controlled dual air conditioning system and controller therefor  
A thermal zone demand controlled air conditioning fan coil unit using dual cascade arranged heat pumps, chilled water, or a combination of chilled water and hot water, with or without back up...
6789618 Energy recycling air handling system  
An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature below the temperature of the air supplied by the central source of the...
6725914 Double duct changeover HVAC system  
The invention is a double duct changeover HVAC system, which uses two conditioned air sources to deliver air into two main duct systems. The two main duct systems are routed toward the exterior...
6719625 Method and apparatus for controlling variable air volume supply fans in heating, ventilating, and air-conditioning systems  
A control strategy for supply fans in variable-air-volume heating, ventilating, and air-conditioning systems that reduces the static pressure at part-load conditions. The invention consists of a...
6634422 Method for controlling an economizer  
A method of controlling an economizer is provided. A heating, ventilating, and air conditioning unit is operated in one of a heating mode and a cooling mode to provide conditioned air to a...
6604688 Air handler with return air bypass for improved dehumidification  
A VAV air handler includes a cooling coil with a return air bypass damper for improved dehumidification. The bypass interjects into the supply air a portion of relatively warm, dry return air...
6364211 Wireless damper and duct fan system  
A temperature regulating apparatus comprising, an airflow rate controller to increase or decrease the flow of air supplied from a central heating ventilation and air conditioning system exiting a...
6338437 Process and apparatus for individual adjustment of the temperature set points of a plurality of VAV devices through a network server  
An apparatus and process for individual adjustment of the temperature set points of a plurality of VAV devices ( 27, 29 ) in an HVAC system. The process includes the step of directly, or indirectly...
6298912 Method and system for controlling an economizer  
A method and system for controlling the temperature of air returned to a conditioning unit in a zoned system is disclosed. The system includes a heating, ventilating, and air conditioning (HVAC)...
RE37245 Variable air volume environmental management system including a fuzzy logic control system  
A controller for a variable air volume terminal of a variable air volume air conditioning system which comprises a temperature sensing circuitry for generating a temperature process value, a...
6095426 Room temperature control apparatus having feedforward and feedback control and method  
A controller for heating, ventilating and air-conditioning distribution systems, which includes feedforward and feedback control strategies. The controller has a feedforward control strategy that...
6000232 Refrigeration system and method of control  
A refrigeration system is disclosed in which temperature regulation and energy efficiency are improved. Each compartment to be cooled is provided with a variable speed fan, the speed of which is...
5971067 Air quality control system  
The present invention is a system for controlling the quality of air in a building. The system includes a sensor disposed for sensing the air quality in a building. Upon a sensing of an air quality...
5944098 Zone control for HVAC system  
A control assembly for a HVAC system serving a plurality of zones within a structure, having ducting including a damper situated in an outlet of the ducting leading to each zone, a biasing element...
5931227 Conversion of constant volume heating/air conditioning systems  
Constant volume multizone heating/air conditioning systems are converted to variable volume air conditioning systems. Energy conservation is achieved by converting the fan drive from one requiring...
5927398 Device identification system for HVAC communication network  
A system is disclosed for conveying network identifications of HVAC master controllers within an HVAC communication network to their respective zone controllers. Each master controller addresses...
5860473 Multi-zone automatic changeover heating, cooling and ventilating control system  
A climate control system having a control means for receiving cool call signals and heat call signals from a plurality of thermostats. The control means blocking action by conflicting calls when...
5829674 Zone system control  
A device and method for controlling the conditioning of air in the zones of a forced air HVAC system. The device comprises thermostats located in at least two different zones, air ducts and dampers...
5769315 Pressure dependent variable air volume control strategy  
A control strategy for rejecting supply air temperature disturbances in variable air volume air conditioning units using staged DX cooling. The strategy, and corresponding system, minimizes supply...
5769314 Variable air volume HVAC system controller and method  
A variable air volume heating, ventilation and air conditioning (HVAC) system controller with adaptive control architecture adjusts control parameters to provide for increased direct expansion coil...
5725148 Individual workspace environmental control  
In building environmental control, primary HVAC services are supplemented to improve individual user comfort by automatically adjusting lighting levels and airflow direction mix in the individual...
5701750 Zone demand controlled dual heat pump system and controller therefor  
A thermal zone demand controlled dual cascade arranged heat pump system and system controller for building spaces, having first and second heat pumps and having an air circulation system for...
5605280 Self-balancing variable air volume heating and cooling system  
A variable air volume heating and cooling system that provides automatic system-wide airflow balancing is disclosed. To balance the system, each terminal box maximum airflow setting is...
5555195 Controller for use in an environment control network capable of storing diagnostic information  
The present invention relates to a diagnostic system for use in a network control system. The diagnostic system is preferably utilized to analyze VAV box performance in an environmental control...
5402845 Recovery process for heat pump system  
A process for noting in advance when a change in set point temperature is to occur in one or more zones. A heating stage is prematurely activated and dampers are selectively opened in the one or...
5344069 Air conditioning apparatus for distributing primarily-conditioned air to rooms  
Primarily-conditioned air is discharged from a heat source, and distributed into a plurality of rooms through a duct. The duct has a plurality of air passages connected to the rooms, and a damper...
5305953 Reactive heating control system  
Method and apparatus are disclosed for responding to an unpermissible rise in the supply air temperature in any zone of a variable air volume system. A warning is generated to a controller in each...
5279609 Air quality-temperature controlled central conditioner and multi-zone conditioning  
An air quality and temperature responsive air conditioning system wherein modules are employed to precondition the air for humidity control, to heat and cool the air, and to bypass the supply air...
5179524 Fan-powered mixing box assembly  
A fan-powered mixing box assembly through which conditioned air is supplied to a plurality of zones is controlled by a programmable fan-box monitor. The assembly comprises a mixing box, a...
5161608 Air conditioning system for a building  
An air conditioner for a building having a plurality of rooms has heating and cooling modes. A duct system connects the air conditioner to the individual rooms. A plurality of control valves are...
5092394 Switching panel and system for controlling zoned heating and cooling systems  
A zoned heating and cooling system is controlled by a switching panel with a controlling thermostat in a first zone, and an additional thermostat in each additional zone. A switching element...
5076346 Air conditioner  
A duct type of air conditioner wherein temperature in a plurality rooms are controlled independently, and which after having controlled opening and closing of dampers for the rooms, is capable of...
5071065 Procedure for controlling and maintaining air currents or equivalent in an air-conditioning installation, and an air-conditioning system according to said procedure  
The present invention concerns a procedure and apparatus for controlling and maintaining air currents or equivalent in an air-conditioning installation or equivalent. The air-conditioning...
5024265 Zone control system providing synchronization of system operation with the zone of greatest demand  
A zone control system uses signals from a plurality of separate zone thermostats to determine the zone of greatest thermal load or demand. Specifically, the on-time of each thermostat signal is...
5004149 Central air conditioning system having compensating control function for total heat load in a plurality of rooms  
A central air conditioning system includes a compensating control function in which the prescribed target temperature Tfs of the conditioned air supplied from the air conditioning apparatus to a...
4997030 Central air conditioning system having remote controller in a plurality of rooms for starting or stopping air conditioning apparatus  
A central air conditioning system includes an air conditioning apparatus having a system controller and a variable air volume controller having a damper which controls the amount of conditioned air...
4997029 Air conditioning apparatus  
An air conditioning apparatus of a VAV system has a main controller which comprises an operation mode changing means, a temperature schedule inputting means for inputting data for warming or...
4969508 Wireless thermostat and room environment control system  
An environment control system permitting the occupant of a room or space in a multi-room building sharing a common air supply conduit with other rooms to control the environment in his or her room...
4948040 Air conditioning system  
A duct type air conditioning system with a variable capacity blower in which the maximum blower capacity is established at initialization of the system at the optimum blower capacity. The optimum...
4932466 Relay panel and system for controlling zoned heating and cooling systems  
A zoned heating and cooling system is controlled by a relay panel with a controlling thermostat in a first zone, and an additional thermostat in each additional zone. A relay corresponding to each...
Matches 1 - 50 out of 103 1 2 3 >