When trying to sell a customer a high-end furnace, contractors may espouse benefits such as higher efficiencies, which usually translate into lower utility bills. Quieter operation is also a good selling point, as is improved comfort resulting from variable-speed technology.
A less obvious but no less important benefit can be found in the form of the variable-speed draft inducer. The device means improved comfort for customers. The draft inducer eliminates intermittent heating operation due to nuisance pressure switch cycling, which may occur on furnaces with standard shaded-pole or permanent-split capacitor (PSC) draft inducers.