Enjoy reliable heating and cooling with a 4 Ton Split System Air Conditioner paired with a Gas Furnace and Cased Coil. Built for homes and spaces between approximately 2,100 and 2,400 square feet, these systems combine high-capacity cooling with natural gas or propane (LP) heating. Choose from furnace options ranging from 80% to 96% AFUE, meaning only 4% to 20% of the fuel energy is lost. A 4 ton gas split system offers an efficient, proven solution for year-round comfort. Family owned and operated for over 30 years, we deliver fast shipping, free duct designs, honest upfront pricing, and expert technical and warranty support.