Gas Furnace Selection

Infinity™ Series Gas Furnace

  • Heating Efficiency: Up to 98.5% AFUE
  • ENERGY STAR® Certified, Select Models. 
  • Stages of Heating: Modulating
  • Motor: Variable-Speed
  • Enhanced Humidity Control
  • Premium comfort features for more precise temperature control and fewer temperature swings
  • Extremely quiet operation with a fully insulated cabinet to help minimize noise levels
  • Type: Gas
  • 10-year parts limited warranty upon timely registration and lifetime heat exchanger limited warranty upon timely registration.

Performance™ Series Gas Furnace

  • Heating Efficiency: Up to 96.7% AFUE
  • ENERGY STAR® Qualified, Select Models. 
  • Stages of Heating: Two-Stage
  • Fully Insulated Cabinet
  • Motor: Variable-Speed
  • Enhanced Humidity Control
  • Enhanced comfort features with high and low stage heating options for improved temperature control and more consistent comfort.
  • InteliSense™ Technology Allows for critical equipment performance data to be gathered and shared with your dealer who can reassure you that your system is running properly. 
  • Extremely quiet operation with a fully insulated cabinet to help minimize noise levels.
  • Type: Gas
  • 10-year parts limited warranty upon timely registration and lifetime heat exchanger limited warranty upon timely registration.

Comfort™ Series Gas Furnace

  • Heating Efficiency: Up to 97% AFUE
  • ENERGY STAR® Qualified, Select Models. 
  • Stages of Heating: Single-Stage
  • Motor: Multi-Speed / Single-Speed
  • Type: Gas
  • 10-year parts limited warranty upon timely registration and Lifetime heat exchanger limited warranty upon timely registration.

Popular Questions

Understanding Furnace Technology

90% Plus Furnaces

 A 90% plus furnace has two heat exchangers (a primary and a secondary) and are commonly called “condensing” furnaces.  These furnaces are capable of extracting at least 92% of the heat from combustion and transferring it into your home.  The term “90% plus” means just that, the furnaces’s efficiency rating is above 90%.  For each $1.00 of natural gas that the furnace uses, at least 92% (or $.92) is used to actually heat your home and the remaining 8% (or $.08) is vented to the outside through the sidewall or roof of your home using a PVC plastic pipe.  

80% Efficiency Furnaces

An 80% efficiency furnace has only one (or primary) heat exchanger and extracts at least 80% of the energy from the combustion process and transferring it into your home.  Simply stated, for each $1.00 of natural gas or propane that is used by the furnace, at least 80% (or $.80) is actually used to heat your home.  The remaining 20% (or $.20) is vented out through your chimney or flue pipe. All 80% furnaces connect to your existing chimney or flue pipe.