What is a key feature of a two-stage furnace?

A key feature of a two-stage furnace is that it produces two different levels of heat. This design allows the furnace to operate at a lower heating output during milder weather, which enhances energy efficiency and improves comfort. The ability to switch between a lower, more efficient output and a higher output when more heat is needed allows for better temperature control in the home. This feature helps maintain a more consistent indoor environment while also reducing energy consumption compared to a single-stage furnace, which only has one heat output level. The two-stage operation can lead to lower utility bills as it avoids running at maximum capacity for prolonged periods when it isn't necessary.