Goodman 3 Ton 15 SEER Package Heat Pump System GPH1536M41 Goodman GPH1536M41 heat pump is ideal for modular homes that come with smaller duct work. Since, it is a self contained package unit; the only required connections are low voltage wiring and drain connection, supply and return ducts. Factory installed bi-flow liquid line filter dryer Copper tube / aluminum fin coils Totally enclosed, permanently lubricated condenser fan motor Heavy-gauge galvanized-steel cabinet with attractive Architectural Gray powder-paint finish