Rifled copper tubing. · Short cabinet with easy access. · Lanced fin design. · Refrigerant connections are 3/8" ODF liquid and 7/8" ODF suction. · Non-captive panels allow access to inside of cabinet without the need to cut refrigerant lines. · Side panel with only six screws for fast and easy coil access. · UV resistant drain pans are molded of high temperature (450 deg. F) engineered polymer. · Coils are air pressure tested at 500 psi, leak tested with Helium, sealed with rubber plugs and then charged with dry air. · Threaded expansion valves available factory installed or as a field installed kit. · Heavy 24 gauge embossed galvanized cabinets fully lined with 5/8" foil faced insulation. · All coils are foam packed and include bar coding on label. · Easy to use filler strip, if coil dimensions are larger than furnace. · Drain pan has trough to fully drain condensate away. · Microban® antimicrobial additive to inhibit the growth of mold and mildew in the drain pan.