How much does a new Lennox AC cost?

How much a new Lennox AC costs in 2026 depends on model, size, and efficiency, with installed cost ranging from 4,000 to 10,000 dollars for 3-ton unit including outdoor condenser, indoor evaporator coil, labor, refrigerant, and permit. For entry level, Lennox ML14XC1 14 SEER single stage 3-ton costs 4,000 to 5,500 dollars installed, offering basic cooling with single stage compressor and 10-year parts warranty when registered. For mid-range, Lennox EL16XC1 17 SEER two-stage 3-ton costs 5,000 to 7,000 dollars installed, with two-stage compressor that runs at low stage most time for better humidity control and quieter operation at 70 decibels. For high efficiency, Lennox XC20 20 SEER variable speed 3-ton costs 7,000 to 9,500 dollars installed, with variable speed compressor that adjusts from 35 to 100 percent capacity for ultimate comfort and 59 decibels quiet operation. For premium most efficient, Lennox XC25 26 SEER variable speed costs 8,000 to 11,000 dollars installed, highest efficiency in industry. Prices vary by region: California and Northeast cost 15 to 20 percent more than South. Additional costs include line set at 300 to 600 dollars, electrical disconnect at 150 to 300 dollars, and thermostat at 200 to 500 dollars for iComfort. Compared to Goodman at 3,000 to 5,000 dollars, Lennox costs 30 to 60 percent more but offers higher efficiency and quieter operation.