Shop 3.5 Ton (3 1/2 Ton) Heat Pump Complete Split Systems, ideal for heating and cooling larger homes, offices, or zones between approximately 1,800 and 2,100 square feet. A heat pump works by reversing the flow of refrigerant, heating the indoor coil so that cold air blowing across it becomes warm air inside your home. In summer, the system shifts back to cooling mode, removing heat from the indoor air like a traditional AC. These ducted systems include a backup electric heat strip for additional assurance on colder days. Family owned and operated for over 30 years, we offer fast shipping, free duct designs with system purchases, no hidden fees, and expert support every step of the way.