Gas Furnaces The smooth comfort of gas heat with the most advanced technology For the optimal combination of gas heating and impressive energy efficiency, choose Carrier precision-engineered gas furnaces, from the innovative Infinity™ 96 with IdealHumidity™ to the solid Comfort™ 80. The higher the AFUE rating, the more energy efficient—meaning you'll save more money. compare gas furnaces Infinity 96 Gas Furnace                                                          Communicating furnace with Infinity intelligence          Ultimate energy efficiency and cost savings—up to 96.6% AFUE          ComfortHeat® technology          IdealHumidity®          ComfortFan™ technology,            Enhanced Continuous Fan Variable speed blower          QuieTech® noise reduction system          Sealed combustion system            Pilot-free Power Heat ignition          High efficiency air filtration cabinet          Lifetime heat exchanger limited warranty          5-year parts limited warranty   View Product Infinity 80 Gas Furnace           Communicating furnace with Infinity intelligence        Energy efficiency—80% AFUE        ComfortHeat® technology        IdealHumidity®        ComfortFan™ technology            Enhanced Continuous Fan Variable speed blower        QuieTech® noise reduction system        Pilot-free Power Heat ignition        High efficiency air filtration cabinet        20-year heat exchanger limited warranty        5-year parts limited warranty View Product Performance 93 Gas Furnace                     93% AFUE Two-Stage Heat 4-5 speed blower Continuous Fan Capability Enhanced humidity control Lifetime heat exchanger warranty View Product Performance 80 Gas Furnace 80% AFUE Two-Stage Heat 4-5 speed blower Continuous Fan Enhanced humidity control 20-year heat exchanger warranty View Product Comfort 92 Gas Furnace             Energy efficiency—92% AFUE          ComfortFan™ technology          QuieTech® noise reduction system          Sealed, low-noise combustion system          Pilot-free Power Heat ignition          High efficiency air filtration cabinet          Lifetime heat exchanger limited warranty          5-year parts limited warranty View Product Comfort 80 Gas Furnace 80% AFUE 3-4 speed blower  Enhanced humidity control 20-year heat exchanger warranty View Product BASE Models  Home comfort system tailored to your needs View Information