A clean furnace will serve you well. Dirt is the biggest enemy of your furnace. There are 3 parts of the furnace that should be cleaned, the filter, the blower and the motor. Dirt affects all three basic components of your furnace. The furnace filter should be cleaned or replaced at the beginning of the heating season and once a month during periods of continuous use. Most people don’t realize how a dirty filter can affect the efficiency of your heating/cooling system. As far as your blower and motor go, most customers prefer to let the professionals take care of those, so give us a call at 785-341-4193 to schedule a furnace maintenance appointment. De Hart Plumbing, serving Manhattan Kansas, Junction City Kansas and Wamego Kansas.