Adaptive forced warm air furnace using analog temperature and pr

Adaptive furnace control using analog temperature sensing

Air conditioning system with periodic fan operation

Air heater control

Air heating apparatus

Apparatus and methods for variable furnace control

Apparatus for regulating heater cycles to improve forced-air hea

Automatic air register damper

Automatic control of air delivery in forced air furnaces

Auxiliary air displacement method and unit for furnaces

Blower control circuit for a furnace

Climate control system

Control circuit and device for humidifying air in a heating syst

Control circuit for a forced-air heating system

Control device for a warm air furnace

Control to operate a forced air blower

Controller for two-stage heat source, usable with single and...

Dual-rate fuel flow control system for space heater

Electronic control and method for increasing efficiency of heati

Electronic control system for a gas-fired/hot air furnace with i