Evolution Packaged Gas Furnace and Air Conditioner Model: 577B Key Features 13-14 SEER 11 EER Up to 81% AFUE Energy Star approved Puron® Refrigerant 2-5 tons cooling capacity 40,000-130,000 BTUH heating capacity 72 dB (quiet as a vacuum) 2-speed scroll compressor Loss of charge switch Galvanized steel cabinet Uses Evolution™ Control Louvered grille Evolution diagnostics PerfectHumidity® for perfect comfort 15-year limited warranty on heat exchanger 10-year limited warranty on compressor 5-year limited warranty on entire unit Click here to read more. Preferred Packaged Gas Furnace and Air Conditioner Model: 574B Key Features 13 SEER 11 EER Up to 81% AFUE Puron® Refrigerant 2-5 tons cooling capacity 40,000-130,000 BTUH heating capacity 72-78 dB (quiet as a vacuum) Scroll compressor Loss of charge switch Galvanized steel cabinet Louvered grille Uses Thermidistat™ control PerfectHumidity® for perfect comfort 15-year limited warranty on heat exchanger 10-year limited warranty on compressor 5-year limited warranty on entire unit Click here to read more. Legacy Packaged Gas Furnace and Air Conditioner Model: 574A Key Features 12 SEER Up to 81% AFUE 2-5 tons cooling capacity Loss of charge switch Wire grille Galvanized steel cabinet Uses Standard Thermostat As low as 72 dB (quiet as a dishwasher) 10-year limited warranty on heat exchanger 5-year limited warranty on compressor 5-year limited warranty on entire unit Click here to read more.

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