Traditional comfort equipment is either on or off. Not only does it require significant energy to turn on, it can only function at full capacity, even when warming up the house by a just few degrees. A more efficient option is to have a furnace or air conditioner air handler fan that is equipped with a variable-speed motor. Unlike conventional single-speed motors, a variable-speed motor can run at a wide range of speeds to better match the needs of the home for heating and cooling. In cooling mode, this can mean better control of humidity. In either heating or cooling mode, it results in more energy-efficient operation.