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.
The only way to receive a discount on our expert services is by joining the GSMS Home Club. We believe in rewarding loyalty, not just "one-time" shoppers.
- Member Benefits: 10% discount on all repairs, priority scheduling, and annual safety maintenance.
While we don't offer traditional "coupons," we are proud to be a Premier Lennox Dealer, which allows us to pass massive manufacturer-direct savings and flexible financing options directly to you.
- Current Offer: Receive up to $1,800 in Rebates on a qualifying new Lennox system.
- Financing: Enjoy 0% Deferred Interest for 18 Months with minimum monthly payments.
- Offers valid through the current season. Ask your Specialist for full details during your consultation.
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
