Single-Stage vs Two-Stage Furnace: What’s the Difference?
Although there are exceptions, most residential heating, cooling and ventilation (HVAC) systems use either a single-stage or two-stage furnace to produce heat. The \”stage\” of a furnace refers to its method of operation. While either a single-stage or two-stage furnace can warm your home, they aren’t necessarily the same. Whether you’re purchasing a new home …



