Skip to content
Available 24/7!  Call or Text Us! 

What are the Benefits of a Two Stage Gas Furnace?

Earlier this month we posted a blog about what to think about when you’re buying a new furnace. One of the features that we suggested looking out for was a two stage system. Today we’re going to talk about what a two stage gas furnace is and the advantages of installing one in your home.

What is a two stage gas furnace?

Traditional single stage furnaces only operate at one capacity. That means that even when it’s a relatively mild winter day, a single-stage furnace still operates at the same capacity it would if it were bitterly cold outside.

A two stage gas furnace, on the other hand, operates at two separate capacities: high and low. The low setting is used about 75 percent of the time (sometimes even longer), while the high setting is only used when it’s excessively cold outside.

What are the benefits of installing a two stage gas furnace?

  • Increased efficiency. A two stage furnace’s low capacity consumes less energy than its high capacity. Since the low setting is used a majority of the time, a two stage furnace consumes much less energy than a traditional single stage furnace (even though a two stage furnace operates more often).
  • More consistent heating. With a single stage furnace, your home is blasted with a large amount of heat every time that the system turns on. This can lead to inconsistent spikes and dips in your home’s temperature levels. A two stage furnace operates longer than a single stage furnace (and at a lower setting), which allows it to heat your home more consistently and with much smaller temperature fluctuations.
  • Less system cycling. Another advantage of a two stage furnace operating more often than a single stage furnace is that your system performs much less on-and-off cycling. This puts less stress on your furnace, which helps minimize breakdowns and allows the system to have a longer operating life.
  • Better air quality. Because a two stage furnace has longer heating cycles than a single stage furnace, air is sent through your system’s filtration devices more often. This leads to better air quality because more particles will be removed from your air and your home will have a more consistent supply of freshly filtered air.

If you have any questions about a two stage gas furnace, or if you’d like a heating system serviced or installed in your home, contact Jerry Kelly, your St. Charles heating and cooling contractor. We service the St. Louis area, including towns like Weldon Spring, Wentzville and Winghaven.