This Goodman heat pump and air handler system is a high-efficiency unit with a black powder-coated finish. The system includes a heat pump, air handler, and TXV valve. The compressor type is scroll, and the blower motor has multi-speed capability. The system is designed for multi-positional installation and has a 1-phase power phase. This energy-efficient system is suitable for home improvement and is a great addition to any home or garden. This model replaces the GSZ140421 model & ARUF Air Handler with a more efecient SEER2 model. 3.5 Ton 15 Seer Heat Pump & Air Handler – GSZB404210-AMST42CU1400-TX5N4. Suction Valve Size (Inches).