0% Interest Financing and Lennox Rebates Up to $1,800
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Coupons & Specials

Honest Pricing. No Gimmicks. No Coupons.

Because you shouldn't have to scramble for a coupon just to get a fair price.

For over 39 years, the Downing family has built GSMS on a simple foundation: Integrity. We’ve all been there—trying to dig up a coupon or find a promo code, only to be told "you should have mentioned that sooner." At GSMS, we don't believe in "gotcha" pricing or hidden discounts. We don’t inflate our rates just to offer a temporary coupon. When a GSMS Specialist enters your home, you receive our best and most honest price from the moment we arrive.

Lennox Fall Promotion

Up to $1,800 Off OR 0% Interest for 18 Months

Up to $1,800 Rebate OR 18 Months 0% Interest Financing Keep: Upgrade your home comfort with high-efficiency Lennox equipment and take advantage of limited-time seasonal savings. Choose the savings option that works best for you on qualifying Lennox systems.

Mitsubishi Systems & ALTA Boilers Financing

0% Interest for 18 Months

Upgrade to a high-efficiency Mitsubishi system or Alta boiler and pay over time with 0% interest for 18 months. Enjoy year-round comfort now while you spread the cost, with no interest when paid within the promotional period.

NH rebates & combined savings

Up to $1,500 in rebates

Save with New Hampshire rebate programs on qualifying high-efficiency systems. Many can be combined with manufacturer promotions and financing. View the full rebate breakdown by system type.

$650 instant rebate through NEHPA for qualifying Energy Star heat pumps

Details

SELL BY: September 14, 2026, and December 4, 2026

INSTALL BY: December 11, 2026

SUBMIT CLAIMS BY: January 10, 2027

Manufacturer Promotion Applicability: Please note that the specific promotional rebates and financing terms detailed below apply to qualifying Lennox® systems. For systems from other manufacturers (such as Mitsubishi, AO Smith, or various boiler brands), promotional offers, financing, or rebates are only applicable if explicitly listed on your customized proposal and invoice. To qualify for any listed promotional offers, financing, or rebates across all manufacturers, the system must be purchased between September 14, 2026, and December 4, 2026, and installed by December 11, 2026.

Lennox® Fall 2026 Rebate Offer: Rebate requires the purchase of qualifying items between September 14, 2026, and December 4, 2026, from a participating Lennox® dealer. 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, at 11:59:59 p.m. ET. Rebate is paid in the form of a Lennox Prepaid Mastercard®. 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.

Promotional Financing (0% Deferred Interest for 18 Months): Offer is available for applications submitted between September 14, 2026, and December 4, 2026. All applications are subject to credit review and approval. Not all applicants will qualify. The offer requires the purchase of a qualifying system. No down payment is required. Interest will be charged to your account from the purchase date if the purchase balance is not paid in full within the 18-month promotional period. Minimum monthly payments are required during the promotional period. Standard APR for purchases will apply after the promotional period ends. Complete terms, conditions, and Truth in Lending disclosures will be set forth in the Retail Installment Contract, which you should review carefully.

General Disclaimer: Manufacturers reserve the right to cancel or change these promotional offers at any time. Promotional offers cannot be combined with any other consumer promotions.

NHSaves Utility Rebates and NEHPA Instant Rebates are based on state utility programs and are funded on availability. GSMS lists utility rebates as a visual aid. Your Client Experience Specialist will provide you with our Rebate Packet to assist you with successfully applying for available rebates; however, GSMS will not be held responsible for any unpaid rebates, program changes, or depleted funding.

At GSMS we pride ourselves on providing great service and that includes ensuring your rebate process is as smooth as possible. Although we cannot be held responsible for any rebates or tax credits, your Client Experience Specialist is trained to provide you with all the information needed and step-by-step instructions to help as much as possible.

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Service with a local heart.

We believe a local business should be a pillar of the community. That’s why a portion of every service call we complete goes directly to a local NH non-profit through our We Local initiative.

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