Top Rated Gas Furnace BTU Ratings

Are you looking for a large furnace and want to know what the top rated gas furnace Btu ratings are?  As you know, gas furnace models are made in a variety of sizes to fit your home’s specific needs.  Below, you’ll find a list of some of the largest gas furnaces on the market in terms of their Btu capacity.  Before we get to that, we’ll discuss why sizing a furnace correctly is important.

Sizing a Gas Furnace

Furnaces are produced in sizes ranging from about 45,000 Btu to over 150,000 Btu.  The term Btu stands for British thermal unit.  It is often listed as Btuh or Btu/h which stands for British thermal units per hour.  This is a measurement of how much heat the furnace would create if it ran for one hour straight.

Within any furnace model, there will by several furnace capacities to choose.  For example, the Trane Two-Stage XV95 gas furnace comes in 60,000, 80,000, 100,000 and 120,000 Btu sizes to fit the needs of various homes.  The Bryant Legacy Plus 80 gas furnace comes in 4 sizes: 66,00, 110,000, 135,000 and 154,000 Btu’s.

Before you get a new gas furnace, you should have the furnace contractor do a load calculation on your home.  Here’s why.  If you are replacing a gas furnace, it is likely that the old furnace is too large.  When fuel was cheaper, most furnace contractor put in oversize furnaces to be sure that they’d make adequate heat.  Many existing gas furnaces are 20,000 to 30,000 Btu’s too large.

This can be especially true if the house’s energy efficiency has been upgraded through adding insulation to the attic or replacing windows and doors with energy efficient ones.  A furnace that is too large will waste energy and produce utility bills that are higher than they should be.

Secondly, when the furnace is too large, your house will heat up too quickly.  Your thermostat, which contains a temperature sensor, is probably centrally located in your home.  When a home heats up too quickly, the areas closer to the furnace than the thermostat may get too warm; the areas further away from the furnace than the thermostat won’t get adequately warmed. A furnace that is properly sized will have longer heating cycles than one that is too big.  It will run more often.  The result will be gentler, more balanced heating that will reduce warm and cold spots.  If your current furnace produces imbalanced temperatures, it is probably too big!

Large Capacity Gas Furnaces

If you’ve been told you need a large furnace, or if your home is over 2,500 square feet in a cool climate or over 3,000 square feet in a warmer climate, then we’ve got some models you should consider.  Here are some of the largest capacity gas furnaces currently available. Each of these models comes in a range of capacity, but we’ve listed the largest. You’ll notice that Lennox or Bryant make several furnaces of the same large capacity.  This is because they use the same gas burner for many of their models to simplify production.

Aire Flo CG92 gas furnace: 125,000 Btu

Rheem Classic Plus Series Super Quiet 80 RGLT gas furnace: 125,000 Btu

York Latitude TG9S gas furnace: 130,000 Btu

Coleman Comforteer Single-Stage gas furnace: 130,000 Btu

Dave Lennox Signature Collection SL280V gas furnace: 135,000 Btu

Dave Lennox Signature SLP98V gas furnace: 135,000 Btu

Lennox Elite G61 gas furnace: 135,000 Btu

Trane XC80 gas furnace: 140,000 Btu

Amana AMH80 gas furnace: 140,000

Bryant Evolution Plus 80v gas furnace: 154,000 Btu

Bryant Legacy Plus 80 gas furnace: 154,000 Btu

Bryant Preferred 80t gas furnace: 154,000 Btu

Carrier Infinity 80 gas furnace: 154,000 Btu

Gas Furnace Load Calculation

Be sure to have a load calculation done before you settle on any model.  Getting the lowest possible heating bills and the most comfortable home depend on installing the right size furnace.

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