Shop 4 Ton Heat Pump Complete Split Systems, built to efficiently heat and cool larger homes, offices, or spaces between approximately 2,100 and 2,400 square feet. A heat pump works by reversing the flow of refrigerant, causing the indoor coil to heat up so that cold air passing over it becomes warm air inside your home. During the summer months, the system switches to cooling mode, removing heat from the indoor air like a standard air conditioner. Each system includes a backup electric heat strip for extra heating support on colder days. Family owned and operated for over 30 years, we offer fast shipping, free duct designs with every system purchase, honest pricing, and expert customer and warranty support.