The 10-20 ton Rheem RAWL, Split System Air Conditioning units feature earth-friendly R-410A refrigerant. The Rheem Commercial Series Split System Air Conditioners combine money-saving efficiency, whisper-quiet operation, environmental-friendliness and superb reliability to bring you peace of mind - year after year. Nothing performs more reliably than a Rheem Split System Air Conditioner. It's that simple. This platform provides you with a full line of capacities that are each AHRI-certified. The design is certified by CSA International.