Evolution® Packaged Gas Furnace and Air Conditioner (Best)

• Up to 15 SEER
• Up to 12 EER
• 8.0 HSPF
• Up to 81% AFUE
• ENERGY STAR® approved
• Puron® refrigerant
• 2-5 tons cooling capacity
• 40,000-130,000 BTUH heating capacity
• As low as 72 dB (quiet as a vacuum)
• 2-speed scroll compressor
• Loss of charge switch
• Galvanized steel cabinet
• AeroQuiet™ Top
• Uses Evolution® Control
• Louvered grille
• Evolution diagnostics
• Perfect Humidity™ system for perfect comfort
• 10-year parts limited warranty upon registration; Stainless ...steel heat exchanger lifetime parts limited warranty upon registration; Copper coil 5-year parts limited; Tin plated coil 10-year parts limited warranty

Preferred™ Packaged Gas Furnace and Air Conditioner (Better)

• 14 SEER / 12 EER (577C) (pictured above)
• 13 SEER / 11 EER (574B)
• Up to 81% AFUE
• Puron® refrigerant
• 2-5 tons cooling capacity
• 40,000-130,000 BTUH heating capacity
• As low as 72 dB (quiet as a vacuum)
• Scroll compressor
• Loss of charge switch
• Galvanized steel cabinet
• Louvered grille (577C)
• Wired grille (574B)
• 10-year parts limited warranty upon registration; Aluminized... heat exchangers 15-year parts limited warranty; Stainless steel heat exchanger lifetime parts limited warranty upon registration; Copper coil 5-year parts limited; Tin plated coil 10-year parts limited warranty (577C)
• 10-year parts limited warranty upon registration; Aluminized... heat exchangers 15-year parts limited warranty; Stainless steel heat exchanger lifetime parts limited warranty upon registration; Copper coil 5-year parts limited; Tin plated coil 10-year parts limited warranty (574B)

Legacy Packaged Gas Furnace and Air Conditioner (Good)

• 13 SEER
• Up to 81% AFUE
• 2-5 tons cooling capacity
• Loss of charge switch
• Wire grille
• Galvanized steel cabinet
• As low as 76 dB (quiet as a dishwasher)
• Uses Standard Thermostat
• 10-year parts limited warranty upon registration; Aluminized... heat exchangers 10-year parts limited warranty upon registration; Stainless steel heat exchangers lifetime parts limited warranty upon registration; Copper evaporator coil 5-year parts limited warranty; Tin plated evaporator coil 10-year parts limited warranty (574D)
• 5-year parts limited warranty; Aluminized heat exchangers 10...-year parts limited warranty upon registration; Stainless steel heat exchangers lifetime parts limited warranty upon registration; Copper evaporator coil 5-year parts limited warranty; Tin plated evaporator coil 10-year parts limited warranty (574A)