Although many homeowners prefer the heat pump for their heating and air conditioning needs, the furnace is still a popular option for providing heat during the winter months. The furnace uses a time-tested and proven design for a reliable production of warm air, and whether it runs using gas, oil, or electric power it will keep a home or commercial building warm and comfortable during cold weather. Basic Furnace Operation Essentially, a furnace uses either an open flame burner (gas and oil models) or electric heating elements to warm the air which is then pushed by a fan through a
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