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Class Information
Number: 236/1E
Name: Automatic temperature and humidity regulation > Miscellaneous > Multistage controls

Sub-classes under this class:

Class Number Class Name Patents
236/1EA Multiple valve staging 76
236/1EB Single valve staging 27

Patents under this class:
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Patent Number Title Of Patent Date Issued
8594850 Updating control software on a network-connected HVAC controller Nov. 26, 2013
8560126 Setpoint optimization for air handling units Oct. 15, 2013
8550368 Interactive control system for an HVAC system Oct. 8, 2013
8539978 Gas valve unit with bypass flow Sep. 24, 2013
8521332 Actuator for HVAC systems and method for operating the actuator Aug. 27, 2013
8489243 Thermostat user interface Jul. 16, 2013
8413454 Interactive control system for an HVAC system Apr. 9, 2013
8195313 Thermostat user interface Jun. 5, 2012
8146584 Pressure switch assembly for a furnace Apr. 3, 2012
8108075 Failsafe HVAC control upgrades Jan. 31, 2012
7870854 Closed-loop control system for heating systems Jan. 18, 2011
7793649 Temperature control apparatus and method for a barbeque grill Sep. 14, 2010
7731096 Controller for two-stage heat source usable with single and two stage thermostats Jun. 8, 2010
7568908 Low fire start control Aug. 4, 2009
7464561 Unitary control for air conditioner and/or heat pump Dec. 16, 2008
7296426 Interactive control system for an HVAC system Nov. 20, 2007
7188002 Appliance diagnostic display apparatus and network incorporating same Mar. 6, 2007
7083109 Thermostat having modulated and non-modulated provisions Aug. 1, 2006
6705533 Digital modulation for a gas-fired heater Mar. 16, 2004
6505099 Radiant energy control system Jan. 7, 2003
6450409 Method and apparatus for wiring room thermostat to two stage HVAC system Sep. 17, 2002
6247898 Computer fan speed control system Jun. 19, 2001
6244515 Universal two stage gas furnace ignition control apparatus and method Jun. 12, 2001
6230979 Controller for two-stage heat source, usable with single and two stage thermostats May. 15, 2001
6179212 Variable output multistage gas furnace Jan. 30, 2001
6138467 Steady state operation of a refrigeration system to achieve optimum capacity Oct. 31, 2000
5806762 Airless atomizing nozzle and system for humidity control Sep. 15, 1998
5806760 Furnace controller useable, without modification, with either a single or two stage thermostat Sep. 15, 1998
5405079 Method of providing auxiliary heat during primary heat pump lock-out Apr. 11, 1995
5400962 System and method for reduced purge operation of a forced draft burner in a water heater Mar. 28, 1995
5369597 System for controlling heating or cooling capacity in heating or air conditioning systems Nov. 29, 1994
5341577 Drying method of and drying apparatus for powder and granular material Aug. 30, 1994
5317670 Hot water storage system May. 31, 1994
5271556 Integrated furnace control Dec. 21, 1993
5172654 Microprocessor-based boiler controller Dec. 22, 1992
5119884 Multiple stage electronic temperature control for heating and cooling Jun. 9, 1992
4696427 Method of transforming a pre-existing heat installation, and control device for implementing the method Sep. 29, 1987
4534321 Apparatus for controlling a number of boilers Aug. 13, 1985
4445567 Thermostat for control of an add-on heat pump system May. 1, 1984
4427055 Heating and cooling system using ground water Jan. 24, 1984
4412581 Heating installation comprising a boiler and a heat pump Nov. 1, 1983
4350144 Hot water heating system Sep. 21, 1982
4332352 Multistage thermostat using integral initiation change means Jun. 1, 1982
4325224 Method and apparatus for transport refrigeration system control Apr. 20, 1982
4302663 Control system for a heater Nov. 24, 1981
4293027 Control system for heating and cooling units Oct. 6, 1981
4272012 Method and system for controlling a plurality of temperature conditioning units Jun. 9, 1981
4270362 Control system for an air conditioning system having supplementary, ambient derived cooling Jun. 2, 1981
4259847 Stepped capacity constant volume building air conditioning system Apr. 7, 1981
4248053 Dual capacity compressor with reversible motor and controls arrangement therefor Feb. 3, 1981

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