Patent ID: 6968707

Claim:
A variable speed air handling system for heating and/or cooling a room, the system comprising: a fan assembly to transport air from the system into the room, the fan assembly having a substantially continuously adjustable speed within a range of speeds defined by a predetermined upper limit and a predetermined lower limit; a user interface to transmit a signal in response to a desired speed of the fan assembly input by an operator via the user interface; a control unit for substantially continuously adjusting the speed of the fan assembly to a speed in the range of speeds in response to the signal transmitted by the user interface; a climate control unit for heating and/or cooling the air to be transported from the air conditioner by the fan assembly; a heat exchanger in thermal communication with the climate control unit; and a frost sensor to detect the accumulation of frost on a surface of the heat exchanger, wherein the climate control unit is deactivated in response to a signal transmitted by the frost sensor.