Efficiency ratings up to 14.0 SEER, 13.2 IEER and 11.7 EER;Matches the most popular footprint in the commercial industry, eliminating the need for an adapter curb in many replacement jobs;Eco-Last Coil System uses up to 52% less refrigerant, is up to 59% lighter, and has up to 20% fewer brazed joints than regular rooftop unit coils (standard on ZC and ZG models);18% lighter than other like units;Goes through a 200-point quality check;High-pressure switch guards the compressor from extreme operating conditions;Proven scroll compressor helps long-term operation;Tool-less access to filters allows for easy service;Common utility connection points allow for faster and easier installations;10-year limited warranty on aluminized gas heat exchanger;5-year limited warranty on compressor;3-year limited warranty on Eco-Last Coil System;1-year limited warranty on covered components