The 19 Series is available as a heat pump. Affordable and convenient, Goodman ductless systems offer quiet operation that will help enhance every day comfort. Ambient Operating Temperature -15° C to 50° C PRICE INCL $150 DELIVERY. Energy-Efficient Rating Up To 19 SEER Goodman branded units are built with the variable-speed Inverter technology to gradually regulate indoor temperatures that may help to provide efficient and even temperature control all year long. They are an energy efficient and flexible solution to help regain control of your indoor comfort and help address a variety of heating and cooling challenges. With duct work not required, the conditioned air is delivered to you directly.