How much a Costco Lennox HVAC unit costs is typically 5,000 to 12,000 dollars installed for furnace and AC combined, and 4,500 to 9,000 dollars for AC only 3-ton, which includes Costco Shop Card rebate of 10 to 15 percent. Costco does not stock Lennox HVAC in warehouse but partners with local Lennox dealers through Costco HVAC Program where you buy through Costco website and Costco dispatches authorized Lennox dealer. Pricing: Lennox ML14XC1 AC 14 SEER 3-ton with ML296V furnace 96 percent AFUE package costs 7,000 to 10,000 dollars installed through Costco, including both units, coil, labor, and permit, plus Costco Shop Card worth 10 percent or 700 to 1,000 dollars. Lennox EL16XC1 AC 17 SEER two-stage with EL296V furnace costs 9,000 to 12,000 dollars installed plus Shop Card. AC only ML14XC1 3-ton costs 4,500 to 6,000 dollars installed plus Shop Card. Prices are competitive but not always cheapest, as independent Lennox dealer may offer 6,500 to 9,500 dollars for same package without rebate, so net cost similar after rebate. Costco program includes extended warranty and satisfaction guarantee and Executive 2 percent extra. Additional costs include ductwork modifications at 500 to 1,000 dollars. Always compare 3 quotes including Costco and local dealers, as installation quality matters more than brand and some Costco assigned dealers may be less experienced.
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