DLS R454B 18K 230V HP CDUDuctless - Outdoor unit, 37MPRA , Single ZoneEvolution™ Heat Pump with Basepan HeaterIf maximum performance and efficiency are key, look no further than our Evolution™ System heat pump. This ENERGY STAR® qualified ductless system has up to a 35.1 SEER2 rating when paired with the 619PHAQ high wall Even when temps drop to as low as -22° F outside, your interior environment stays cozy (when properly sized and matched with specific indoor units). Powerful yet extremely quiet, our best ductless outdoor solution delivers results.DOCUMENTS Bryant Evolution Ductless Heat Pumps w/ Puron Advance Consumer Brochure Bryant Evolution Ductless Heat Pumps w/ Puron Advance Consumer Brochure (Spanish) SPECIFICATIONS NAME VALUE Refrigerant R454B Suction Line Size 1.8:122