HVAC & Plumbing in Greenland, NH
When it comes to keeping your home comfortable, GSMS is proud to serve homeowners in Greenland, NH. Just a short drive from our office, our team delivers reliable heating, cooling, and plumbing services you can count on year-round. Whether it’s a freezing winter night, a humid summer day, or a plumbing emergency that can’t wait, GSMS is here with prompt, professional solutions. Call 603-424-8258 or contact us today to schedule service in Greenland.
Heating Solutions for Greenland Homes
Rockingham County winters demand dependable heating. GSMS provides full-service care for your home heating system, including:
- Furnace repair & replacement – Get fast fixes or upgrade to a high-efficiency unit.
- Boiler service & installation – Keep your boiler running efficiently or replace it with a modern system.
- Heat pump systems – Energy-efficient heating and cooling in one system.
- 24/7 emergency heating repair – Because breakdowns don’t wait for business hours.
Cooling Services You Can Rely On
Summers in New Hampshire can be muggy and uncomfortable without the right cooling system. GSMS helps you stay cool with:
- Central AC installation & repair – Reliable cooling for the whole home.
- Ductless & mini-split systems – Perfect for additions, historic homes, or targeted comfort.
- Seasonal AC maintenance – Extend your system’s life and improve efficiency.
- Indoor air quality upgrades – Reduce allergens, humidity, and improve airflow with filters and purifiers.
Plumbing Services in Greenland, NH
Plumbing problems can disrupt your whole household. GSMS offers solutions for everything from small leaks to major repairs, including:
- Water heater repair & installation – Tank and tankless options available.
- Sewer line inspections & repair – Camera inspections catch problems early.
- Fixture installation & plumbing upgrades – Faucets, showers, sinks, and more.
- Whole-home water filtration systems – Enjoy cleaner, better-tasting water throughout your home.
Why Greenland Homeowners Choose GSMS
- Local expertise since 1987 – Decades of trusted service across NH and southern ME.
- Family-owned and operated – Personalized service you can rely on.
- Lennox Premier Dealer – Offering the latest high-efficiency equipment.
- Emergency service when you need it most – Available 24/7.
- Home Club Membership – Year-round maintenance, discounts, and peace of mind.
Whether you’re facing a broken heater, a backed-up drain, or you’re planning a new system installation, GSMS is nearby and ready to help. Our team brings reliable service, honest advice, and long-lasting solutions to homes throughout Greenland, NH. Call today 603-424-8258 or contact us online for service today!
Recent Jobs and Reviews in Greenland, NH
Our Local Reviews by City
- Amherst, NH (9)
- Atkinson, NH (2)
- Auburn, NH (1)
- Barrington, NH (21)
- Bedford, NH (27)
- Candia, NH (2)
- Chester, NH (2)
- Concord, NH (6)
- Deerfield, NH (1)
- Derry, NH (2)
- Dover, NH (1)
- Durham, NH (2)
- Epping, NH (1)
- Gilford, NH (1)
- Gilmanton, NH (1)
- Goffstown, NH (7)
- Greenland, NH (2)
- Hampstead, NH (2)
- Henniker, NH (3)
- Hillsborough, NH (1)
- Hollis, NH (13)
- Hooksett, NH (12)
- Hudson, NH (6)
- Lee, NH (1)
- Litchfield, NH (3)
- Londonderry, NH (12)
- Manchester, NH (48)
- Merrimack, NH (33)
- Milford, NH (6)
- Moultonborough, NH (1)
- Nashua, NH (41)
- New Boston, NH (3)
- Newbury, NH (1)
- Newmarket, NH (2)
- Northfield, NH (1)
- Northwood, NH (1)
- Pembroke, NH (1)
- Raymond, NH (1)
- Rochester, NH (2)
- Salem, NH (3)
- Sandown, NH (2)
- Stratham, NH (5)
- Tilton, NH (1)
- Weare, NH (5)
- Windham, NH (7)
- York, ME (1)
Job Locations and Reviews
Zak was fast, efficient, and knowledgeable. Well done!

added depth to cover guard so the 90 fitting for the electric conduit would tuck behind the cover guard. also added in some adhesive high strength tape to hold up the bottom section.

Put more insulation around supply vent

I found two faulty flare connections which caused the system to lose its refrigerant charge. I cut out the flares and made new ones. I checked all other flare connections and performed a pressure test which held. I pulled a vacuum on the system and refilled with the entire calculated system refrigerant charge. Thank you!
Jack was knowledgeable, friendly, timely and competent.

Replacement of existing Nest thermostats with new Nest PRO 4th Generation Silver thermostats. One thermostat per system.

Modify the scope of work to install Reggio Registers for the first-floor registers. Supply and return registers will be ordered based on the sizes required upon installation. Standard Hart & Cooley metal registers will be installed until the special-order Reggio registers arrive. GSMS will then remove the standard registers and install the new Reggio registers. Lead time for custom order registers is 3-4 weeks.
Had an issue with our heat pump. Reached out for assistance and they had someone on site that afternoon. Problem was resolved quickly. Super friendly service. The tech was exceptionally friendly and an excellent communicator. Highly recommend
It was a pleasure serving you and your family. Thank you for sharing your kind words with us. It means the world to us and to our entire team!

Installation of a modern heat pump system to provide the second floor with cooling and supplemental heating. A mini-ducted unit which will serve son's and daughter's bedroom and office. A single thermostat will control these three rooms. A wall-mounted head will be installed in the primary bedroom. Outside, linehide will travel down the exterior following the line of the chimney for a clean and professional installation. Outdoor unit will be placed next to central system, keeping in mind clearances to protect efficiencies for either system. New circuit installed, we have a service outlet within 25' next to the rear door.

We’re pleased to propose the installation of our GSMS Choice central air systems, designed to provide your home with reliable, quiet, and comfortable conditioned air. This project includes two separate systems to serve each floor of your home, maximizing efficiency and comfort. This system is our new A2L refrigerant system with R454-B refrigerant. First Floor: System Setup: Ductwork will distribute supply registers throughout the floor for consistent air circulation. These registers will feature our standard dark brown metal grille. Returns: Common return vents will be strategically placed to ensure balanced airflow. Second Floor: System Setup: Supply registers will be installed on the ceiling throughout the second floor, featuring our standard white plastic grille. Dedicated Returns: Each bedroom will have a dedicated return vent, ensuring proper airflow even with doors closed. Attic Access & Safety: Decking will be installed to provide safe access to the air handler in the attic. A