Variable induction apparatus with a primary fluid flow controlle

Variable input-resistance power supply circuit

Variable output heating and cooling control

Variable output heating and cooling control

Variable output multistage gas furnace

Variable resistance temperature compensator

Variable speed control of livestock ventilation fans using discr

Variable speed damper means

Variable speed fan drive system

Variable time constant anticipation thermostat

Variable value constant volume flow device

Variable volume air conditioning system with velocity readout at

Variable volume air damper control having a damped actuator

Variable volume air valve

Variable volume control assembly

Variable volume control assembly

Variable volume control box and system incorporating same

Variable-air-volume diffuser actuator assembly and method

Variable-air-volume diffuser with independent ventilation air as

Variable-air-volume diffuser with induction air assembly and met