What is a Two- Stage Furnace?

Can someone please explain how a Two- Stage Furnace works?

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Phillip,

A two-stage furnace operates much more efficiently than a single-stage furnace. For most climates, the first stage operates the majority of the time, and runs at about 65% of the furnace's full capacity. When the temperature outside becomes extremely cold and the first stage is not sufficient enough to heat your home, the second stage kicks on to provide the additional heat requirements.

This allows warm air to be distributed into your home more evenly, which helps to reduce air fluctuations. Two-stage furnaces also help to increase energy efficiency on moderate-temperature days since they will, in most cases, remain on the low stage. They also provide a higher level of comfort due to a steady flow of warm air on the coldest winter days.

A two-stage furnace provides the right amount of heat to efficiently satisfy your home and family's needs. In addition, a two-stage furnace is much quieter since it doesn't operate at 100% capacity every time it runs, and creates less carbon dioxide emissions for the environment.

Hope this helps!