Quantum Coil enhanced aluminum coil;Lennox Power Saver technology - constant-torque blower motor boosts system efficiency, helping homeowners qualify for energy rebates;Suitable for use with R-410A refrigerants;Upflow/Horizontal capability;Tool-free access to filter area for quick and easy servicing;Meets U.S. and Canadian safety standards;The CBA27UHE comes with a 5-year limited warranty on all covered components