5-Year Parts Warranty R-410A chlorine-free refrigerant High-efficiency scroll compressor Copper tube/aluminum fin coils High- and low-pressure switches Built-in filter rack with standard 2 filters (convertible to 4 filters) Heater kits with single-point entry Crankcase heaters Power block for field wiring 24-volt terminal strip Bottom utility entry AHRI Certified ETL Listed Units meet the performance outlined in Table 6.8.1A of ASHRAE Standard 90.1-2010