Upgrade your home's comfort and efficiency with our 3.5 Ton (3 1/2 Ton) Dual Fuel Split Systems, built to handle spaces between approximately 1,800 and 2,100 square feet. These systems combine an electric heat pump for everyday heating and cooling with a natural gas or propane (LP) furnace for powerful backup heat when needed. During milder weather, the heat pump saves energy by maintaining comfort efficiently. When outdoor temperatures drop, the furnace takes over to deliver reliable warmth. A 3.5 ton dual fuel split system offers the flexibility and performance you need all year long. Family owned and operated since 1992, we offer fast shipping, free duct designs, honest pricing, and expert technical and warranty support.