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 Heise Heating & Cooling 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 (573) 335-2265.

Gas Furnace Product Offering

987M

EVOLUTION™ 98 VARIABLE-SPEED MODULATING GAS FURNACE

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Model Family: 987M
Annual Fuel Utilization Efficiency: Up to 98.5% AFUE
Energy Star Certified: ENERGY STAR®
Blower Motor: Variable-speed full-featured ECM
Gas Valve: Modulating
Inducer Draft Motor:
Fan Heating Operation: Four speeds of continuous fan operation with a compatible control
Factory Warranty Parts: 10-year parts limited warranty upon registration
Heat Exchanger Warranty: Lifetime limited warranty; Red ShieldTM 10-year unit replacement warranty (heat exchanger failure only) upon timely registration.
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Variable-speed blower allows unit to operate at lower speeds up to 90% of the time, ensuring consistent airflow and temperature.
  • Perfect Heat™ technology monitors changing conditions to adjust heating
  • Perfect Humidity™technology removes up to 127% more moisture than a standard furnace
  • Fan On Plus™ technology
926T

PREFERRED™ 96 TWO STAGE GAS FURNACE WITH INTELISENSE™ TECHNOLOGY

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Model Family: 926T
Annual Fuel Utilization Efficiency: Up to 96.7%AFUE
Energy Star Certified: ENERGY STAR®
Blower Motor: Variable speed, constant torque high-efficiency ECM
Gas Valve: Two-stage
Inducer Draft Motor:
Fan Heating Operation: Continuous fan operation with a compatible control
Factory Warranty Parts: 10-year parts limited warranty upon registration
Heat Exchanger Warranty: Lifetime limited warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Enjoy the ultra-quiet performance and even-temperature comfort of variable speed air delivery. It's also the best choice for imp
  • Perfect Heat™ technology means consistent comfort by adjusting system operation to changing conditions
  • Perfect Humidity™ technology capability with appropriate control and equipment removes more moisture than a standard furna
  • Fan On Plus™ lets you choose the speed of continuous fan operation with a compatible control
  • Insulated cabinet for quieter operation
912S

Legacy™ 92 GAS FURNACE

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Model Family: 912S
Annual Fuel Utilization Efficiency: Up to 92.1% AFUE
Energy Star Certified: N/A
Blower Motor: Fixed-speed constant torque ECM motor
Gas Valve: Single-stage
Inducer Draft Motor:
Fan Heating Operation: Fixed Speed
Factory Warranty Parts: 10-year parts limited warranty when properly registered.
Heat Exchanger Warranty: 20-year limited warranty on heat exchanger when properly registered.
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Fan On Plus™ technology lets you choose the speed of continuous fan operation with a compatible control
  • PerfectLight™ hot surface igniter eliminates gas-wasting pilot light
  • Insulated cabinet for quieter operation
  • Allows gas furnace/heat pump system combinations for best heating efficiences
  • Filter cabinet
800S

LEGACY MULTI 18-SPEED 80% GAS FURNACE

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Model Family: 800S
Annual Fuel Utilization Efficiency: 80% AFUE
Energy Star Certified: No
Blower Motor: Fixed-Speed Constant Torque ECM (FCT)
Gas Valve: Single-stage
Inducer Draft Motor:
Fan Heating Operation: Single Speed Draft Induced
Factory Warranty Parts: 10-year parts limited warranty
Heat Exchanger Warranty: 20-year heat exchanger limited warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • Insulated cabinet for quieter operation
  • Pilot-free PerfectLight™ ignition
  • Galvanized steel

Coleman Gas Furnaces

CP9C

CP9C 98% Modulating Gas Furnace

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Model Family: CP9C
Annual Fuel Utilization Efficiency: Up to 98% AFUE
Energy Star Certified: ENERGY STAR®
Blower Motor: Variable-speed blower
Gas Valve: Modulating burner design
Inducer Draft Motor:
Fan Heating Operation: Variable-speed ECM fan motor
Factory Warranty Parts: 10-year parts limited warranty; 90 Day Labor warranty
Heat Exchanger Warranty: Lifetime limited heat exchanger warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • 10-year Complete Assurance™ Warranty Pledge
  • WhisperDrive™ comfort system
  • Get a system tailored to your climate with integrated ClimaTrak™ Comfort System
  • Fits comfortably in your home with compact 33-inch cabinet profile.
  • Cut fuel costs nearly 38% compared to old models.
  • Efficient condensing design extracts more heat from less gas.
  • Feel extra safe with 100% shut off main gas valve.
  • Get reliable silicon nitride hot surface heat ignition.
  • Easily supports indoor air quality options.
TM9Y

TM9Y 96% AFUE Two Stage Furnace

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Model Family: TM9Y
Annual Fuel Utilization Efficiency: Up to 96% AFUE
Energy Star Certified: ENERGY STAR®
Blower Motor: Two-stage operation with high-efficiency blower
Gas Valve: Two-stage burner
Inducer Draft Motor:
Fan Heating Operation: Standard, high-efficiency ECM fan motor
Factory Warranty Parts: 10-year parts limited warranty; 90 Day Labor warranty
Heat Exchanger Warranty: Lifetime heat exchanger limited warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • 5-year Complete Assurance™ Warranty Pledge
  • Multi-position
  • Durable, low-leakage cabinet ensures warm air goes where it's needed, quietly and efficiently.
  • Fits comfortably in your home with compact 33-inch cabinet height.
  • Eliminates need for chimney venting with induced combustion design.
  • Cut fuel costs nearly 37% compared to old 60% AFUE models.
  • Extracts more heat from less gas with efficient condensing design.
  • Feel extra safe with 100% shut off main gas valve
  • Get reliable silicon nitride hot surface heat ignition.
  • Easily supports indoor air quality options.
TM9E

TM9E 95% AFUE Single Stage Furnace

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Model Family: TM9E
Annual Fuel Utilization Efficiency: Up to 95% AFUE
Energy Star Certified: ENERGY STAR®
Blower Motor: High-efficiency ECM motor
Gas Valve: Single-Stage
Inducer Draft Motor:
Fan Heating Operation: standard-efficiency ECM fan motor
Factory Warranty Parts: 10-year parts limited warranty; 90 Day Labor warranty
Heat Exchanger Warranty: Lifetime limited heat exchanger warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • 5-year Complete Assurance™ Warranty Pledge
  • Multi-position
  • Fits comfortably in your home with compact 33-inch cabinet profile.
  • Eliminates need for chimney venting with induced combustion design.
  • Cut fuel costs nearly 35% compared to old models.
  • Extracts more heat from less gas with efficient condensing design.
  • Feel extra safe with 100% shut off main gas valve.
  • Get reliable silicon nitride hot surface heat ignition.
  • Easily supports indoor air quality options.
TM8Y

TM8Y 80% AFUE Two Stage Furnace

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Model Family: TM8Y
Annual Fuel Utilization Efficiency: Up to 80% AFUE
Energy Star Certified: No
Blower Motor: High-efficiency, 5-speed blower motor.
Gas Valve: Two-stage burner
Inducer Draft Motor:
Fan Heating Operation: High Efficiency Fan motor
Factory Warranty Parts: 10-year parts limited warranty; 90 Day Labor warranty
Heat Exchanger Warranty: Lifetime heat exchanger limited warranty
Sound Level: Quiet operation
Manufacturer's Stated Benefits:
  • 5-year Complete Assurance™ Warranty Pledge
  • Multi-position
  • Durable, low-leakage cabinet ensures warm air goes where it's needed, quietly and efficiently.
  • Fits comfortably in your home with compact 33-inch cabinet height.
  • Cut fuel costs nearly 20% compared to old 60% AFUE models.
  • Efficient design for a home with a chimney.
  • Feel extra safe with 100% shut off main gas valve.
  • Get reliable silicon nitride hot surface heat ignition.
  • Easily supports indoor air quality options.