CX35 Indoor Coil CX35-30/36C-6F Up-flow, full-cased models 1.5- to 5-ton capacities Factory-installed R-410A thermostatic expansion valve helps ensure sufficient operation Large surface area for high-efficiency operation Lighter, rifled aluminum tubing, hairpins, distributor and header tubes for improved durability in certain environments Non-corrosive, UV-resistant polymer drain pan with dual connections Minimal air resistance for better performance