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Gas Furnaces

Today's new high efficiency furnaces can save up to 50% in operating costs over a ten-year-old furnace. Many 1990 and earlier model furnaces have Annual Fuel Utilization Efficiency (AFUE) ratings of 65% or less. The minimum AFUE rated furnace that can be sold in the United States today is 80% for the Southeast and Southwest, with 90% being the minimum in the North.

Our current product offering starts at 80% AFUE and goes all the way to a very efficient 98%+ AFUE rating. Depending on your average usage, higher AFUE rated furnaces can significantly reduce your gas bill.

The DOE’s regional breakdown by state is as follows:

  • North – 80% AFUE
  • Southeast – 90% AFUE
  • Southwest - 90% AFUE
DOE Regional SEER Breakdown Map

Let Alamo Heating & Air Conditioning Help Pick The Right Furnace For Your Home

We offer many furnaces with variable and multi-speed features that can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. This alleviates the "cold air blow" often associated with single speed furnaces, and dramatically reduces system noise. Call us now at (210) 490-4244.

Gas Furnace Product Offering

G97CMN

Ion™ 98 Variable-Speed Modulating Gas Furnace

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Model Family: G97CMN
Annual Fuel Utilization Efficiency: Up to 98% AFUE
Energy Star Rated: ENERGY STAR® Qualified
Blower Motor: High efficiency variable-speed, constant airflow ECM blower motor
Gas Valve: Modulating gas valve
Inducer Draft Motor:
Fan Heating Operation: Variable Speed
Factory Warranty Parts: 10-Year Parts Limited Warranty
Heat Exchanger Warranty: Limited Lifetime Warranty
Sound Level: Quiet performance
Manufacturer's Stated Benefits:
  • Air purifier and humidifier compatible
  • Fully insulated cabinet keeps the heat moving to your ductwork
  • Wi-Fi® enabled remote access with the Ion™ System Control
  • High temperature limit control prevents overheating
  • Sound-reducing features: soft mounted blower and inducer motor
  • 10-Year No Hassle Replacement™ Limited Warranty
G96CTN

Ion™ 96 Variable-Speed Gas Furnace G96CTN

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Model Family: G96CTN
Annual Fuel Utilization Efficiency: Up to 96.7% AFUE
Energy Star Rated: ENERGY STAR® Qualified
Blower Motor: High efficiency variable-speed, constant airflow ECM blower motor
Gas Valve: Two-stage
Inducer Draft Motor:
Fan Heating Operation: Variable Speed
Factory Warranty Parts: 10-Year Parts Limited Warranty
Heat Exchanger Warranty: Limited Lifetime Warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Dual fuel capable with a compatible heat pump and thermostat for energy-saving heating performance
  • Fully insulated cabinet helps keep the heat moving to your ductwork
  • Air purifier and humidifier compatible
  • Wi-Fi® enabled remote access with the Ion™ System Control
  • 10-Year No Hassle Replacement™ Limited Warranty
N96MSN

Performance 96 Gas Furnace

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Model Family: N96MSN
Annual Fuel Utilization Efficiency: Up to 97.0% AFUE
Energy Star Rated: ENERGY STAR® Qualified
Blower Motor: Constant speed torque ECM blower motor that offers 18 speed options for your dealer to select from for personalize home comfort.
Gas Valve: Single stage
Inducer Draft Motor:
Fan Heating Operation: Single Speed
Factory Warranty Parts: 10 year limited warranty
Heat Exchanger Warranty: Limited Lifetime Warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Air purifier and humidifier compatible
  • High temperature limit control prevents overheating
  • Dual fuel capable with a compatible heat pump and thermostat for energy-saving heating performance
N80VSL

Performance 80 Gas Furnace

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Model Family: N80VSL
Annual Fuel Utilization Efficiency: 80 AFUE
Energy Star Rated: No
Blower Motor: Variable 25-speed constant torque blower motor
Gas Valve: Single stage
Inducer Draft Motor:
Fan Heating Operation: Multi-stage
Factory Warranty Parts: 10-Year Parts Limited Warranty
Heat Exchanger Warranty: 20-Year Heat Exchanger Limited Warranty
Sound Level: Quiet Performance
Manufacturer's Stated Benefits:
  • Fully insulated cabinet helps keep the heat moving to your ductwork
  • Air purifier and humidifier compatible
  • Dual fuel capable with a compatible heat pump and thermostat for energy-saving heating performance