Lennox opened its 2026 Fall promotion on September 14, and it replaces the Cool Down Event that ended September 13. The amounts changed, so if you were quoted under the old promotion the numbers you were given no longer apply. Qualifying Lennox systems now earn a rebate of up to $1,800, paid as a Lennox Prepaid Mastercard, on systems purchased by December 4, 2026 and installed by December 11.
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What the Lennox Fall Promotion Includes
Lennox runs two consumer offers this fall and a dealer picks one to present. The first is a rebate of up to $1,800 on a qualifying Lennox Ultimate Comfort System, or equal payments with no interest for 60 months for qualified buyers. The second is a rebate of up to $1,400 and that same 60 month financing together.
Read that carefully, because it is the part most homeowners miss. The biggest rebate and the financing are not designed to be taken together. If you want both, the rebate steps down to $1,400. If you are paying cash or financing elsewhere, the $1,800 path is the one that pays you more.
Pick One: The Higher Rebate or the Financing
Which way you go usually comes down to whether you were going to finance anyway. If you are writing a check, take the higher rebate. There is no reason to leave $400 on the table for a payment plan you will not use.
If the monthly payment is what makes the project possible, the combined offer is worth more than the difference. Sixty months of equal payments with no interest on a $15,000 system works out to about $250 a month, and you still collect up to $1,400 back. Financing is subject to credit review and approval, not every applicant qualifies, and the full terms come in the retail installment contract. We can walk you through both paths side by side, and our financing options page covers what to expect.
How the $1,800 Adds Up
The headline number is not one line item. It is a system rebate plus add-ons, and you have to buy the pieces to get there.
The system itself, meaning a qualifying outdoor unit, indoor unit and thermostat, tops out at $1,500. From there the Lennox S40 Smart Thermostat adds $100, the PureAir S air purification system adds $125, and the Lennox Smart Zoning System adds $75. Together that is $1,800.
Smaller systems earn smaller rebates, and that is normal. A mid range Elite pairing lands closer to $900 to $1,150, and a Merit system lands lower still. We will tell you the exact number for the equipment we are quoting before you sign anything.
Which Lennox Systems Qualify
Every system rebate requires three things: a qualifying indoor unit, a qualifying outdoor unit, and a qualifying thermostat. There are no exceptions to the thermostat requirement on a full system, though mini split systems do not need one.
The top of the range in Florida is the SL22KLV heat pump or the SL25KCV air conditioner paired with a CBK48MVT air handler, which is where the $1,500 system rebate comes from. Qualifying thermostats include the Lennox S40, E40, M40 and L40, plus Honeywell programmable, Braeburn programmable and Ecobee, though third party thermostats have to be purchased through Lennox.
Individual pieces carry their own smaller rebates if you are not replacing a whole system. Mini splits are on the list too, at $250 for the outdoor unit and $100 for the indoor unit on Lennox Powered by Samsung equipment. If you are still deciding whether this is the year, our guide on repairing or replacing an AC in Florida lays out how to think about it, and the AC installation guide covers what a proper install should include.
The Dates That Matter
There are three deadlines, and missing any one of them costs you the rebate.
Purchase by December 4, 2026. The system has to be sold within the promotion window, which opened September 14, 2026.
Installed by December 11, 2026. A signed contract is not enough. The equipment has to be in and running.
Claim submitted by January 10, 2027 at 11:59:59 p.m. ET. We handle claim entry for our customers, so this is not something you need to chase, but the deadline is firm and late submissions are declined.
How the Lennox Prepaid Mastercard Works
This is a rebate, not a discount on your invoice. Lennox pays it as a Lennox Prepaid Mastercard sent to the homeowner after the claim is audited, approved and paid. Nobody should tell you it comes off the price of the job.
Three to five business days after the claim is marked paid, you get an email and choose a physical card or a virtual one. You have to make that selection within 90 days or the rebate is forfeited. A virtual card is usable immediately and can go into Apple, Google or Samsung Pay. A physical card takes two to four weeks to arrive. Either way the card expires 12 months from the date it is issued, so spend it rather than filing it away.
Who Qualifies, and What Is Excluded
This promotion is for residential installations only, and specifically single family homes. Commercial work does not qualify. Neither do builder or contractor purchases for new construction, homeowner upgrades bought through a builder, or anything installed in a multi family building.
It is also not valid on equipment purchased through retail partners including Costco or The Home Depot, and it cannot be combined with any other Lennox consumer promotion. The purchase has to be made by the person receiving the rebate.
A utility rebate is a different program and is not a Lennox promotion, so if you are curious about that side of it, our post on the $200 FPL AC rebate explains how that one works.
Get a Free Lennox Replacement Estimate
We are a Lennox Premier Dealer on the Treasure Coast, covering St. Lucie, Indian River, Martin and Okeechobee counties. We will size the system properly, tell you the exact rebate the equipment earns, handle the claim paperwork, and be honest with you if replacing right now is not the right call.
Start with a free AC estimate, read more about AC installation on the Treasure Coast, or call (772) 971-8587. You can see everything else we have running on our current offers page.
Rebate Disclaimer: Rebate requires purchase of qualifying items between September 14, 2026 and December 4, 2026 from a participating Lennox dealer. Contact your local participating Lennox dealer for promotion details. Qualifying items must be installed by December 11, 2026. This offer applies to residential installations only. Rebate claims must be submitted (with the Dealer’s invoice to the homeowner listing all models and serial numbers) to www.lennoxconsumerrebates.com no later than January 10, 2027 11:59:59 p.m. ET. Rebate is paid in the form of a Lennox Prepaid Mastercard. Use your card anywhere Mastercard is accepted. This card is issued by The Bancorp Bank, N.A., pursuant to license by Mastercard International. Mastercard and the circles design are registered trademarks of Mastercard International Incorporated. The Bancorp Bank, N.A.; Member FDIC. This is not a gift card. This card is issued for loyalty, award or promotional purposes. Please note that prepaid cards are subject to expiration, so pay close attention to the expiration date of the card. Conditions apply. See www.lennox.com/terms-and-conditions for complete terms and conditions.
Financing Disclaimer: Offer available between September 14, 2026 and December 4, 2026. Requires purchase of qualifying Lennox system. All applications for promotional financing are subject to credit review and approval. Minimum loan amount ranges from $500 to $3,000 based on financing offer. Not all applicants will qualify. If approved, qualified buyers will receive 0% interest for 60 months (“Promotion Period”), with equal monthly payments of the financed principal amount. No penalty for prepayment at any time. If the amount financed is not paid in full prior to the expiration of the Promotion Period, or if a scheduled monthly payment is 31 days or more past due during the Promotion Period, the promotional terms are void and the Promotion Period will end. On the first calendar date following the end of the Promotion Period, the remaining unpaid portion of the amount financed will accrue interest at an Annual Percentage Rate (“APR”), which is the yearly rate of interest that is owed on the amount financed. Applicant’s APR will vary from 2.99% to 25%, based on applicant’s state, total financed amount, term length, and credit profile. Following the end of the Promotion Period, applicant must make equal monthly payments of remaining unpaid financed principal amount and accrued interest for a period of 36 to 60 months. Advertised rates and terms are subject to change without notice. Complete terms and conditions and Truth in Lending disclosures will be set forth in the Retail Installment Contract which you should review carefully.
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