Your Trusted Heating, AC & Plumbing Experts in Pembroke, NH
Since 1987, GSMS has been proud to offer top-notch HVAC services to residents of Pembroke, NH. With over three decades of experience, our family-owned business has built a reputation for excellence, reliability, and outstanding customer service. We provide a comprehensive range of HVAC services, including air conditioning repair, replacement, and maintenance, as well as heating services for furnaces and boilers. Our expert technicians are also skilled in installing and maintaining ductless mini-split systems, ensuring that your home stays comfortable year-round. At GSMS, we use only the highest quality products from leading manufacturers, guaranteeing efficient and long-lasting solutions for your HVAC needs. Whether you need a quick repair, a complete system installation, or regular maintenance, our team is dedicated to providing personalized service tailored to your specific requirements. Don’t let HVAC issues disrupt your comfort—call GSMS today at 603-424-8258 to schedule your HVAC service in Pembroke, NH, and experience the difference of working with trusted local professionals.
In addition to our heating and air conditioning services, we offer top-quality plumbing services to the residents of Pembroke, NH. With over three decades of experience, our family-owned business has established a reputation for trust, reliability, and exceptional customer care. Our comprehensive plumbing services include water heater repair, replacement, and maintenance for both tank and tankless models, ensuring your home has a consistent supply of hot water. We also specialize in kitchen plumbing, from faucet and sink installations to dishwasher and water line services. In the bathroom, our expert plumbers handle everything from toilet and shower repairs to vanity plumbing and pipe replacement. At GSMS, we use only the highest quality materials and the latest techniques to provide efficient and long-lasting solutions for your plumbing needs. Whether you require a quick repair, a complete installation, or regular maintenance, our team is committed to delivering personalized service tailored to your home’s unique requirements. Don’t let plumbing issues disrupt your daily routine—call GSMS today at 603-424-8258 to schedule your plumbing service in Pembroke, NH, and experience the peace of mind that comes with working with trusted local professionals.
Recent Jobs and Reviews in Pembroke, NH
Our Local Reviews by City
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Job Locations and Reviews

Installation of a four-zone mini-split system to provide the main floor and two upstairs bedrooms with conditioned air and supplemental heating. This will not be a HyperHeat unit, meaning it is designed to provide heating for those light-chill Spring and Fall days, not the cold winter months. Outdoor unit will be placed on the side of the home, keeping distance far enough away from the gas meter. Refrigerant lines that run from one side of the home to the other will penetrate through the basement ceiling for a clean appearance outside. The current electrical panel is full and will require additional spaces for the new mini-split system. 200A service already comes into the home. Based on this, we recommend to complete a panel upgrade which will allow for the new mini-split to fit into the circuits.
Adam and Quinn did an excellent job. We love our new central air!!!! They did the job in a timely manner and left their working area absolutely spotless.

Replacement of existing modified system with a reliable heating and cooling system. Ductwork will be modified to support a traditional forced air system located close to the interior wall - where the current wood duct is located. New return grill added to basement trunk to allow for proper airflow. Water heater will be disconnected from heat to allow for it to serve as domestic hot water only. Gas line will be replaced to bring up to GSMS standards with black iron piping to serve the new furnace. AC unit will be located out front, as discussed. Existing AC electrical circuit will be modified to accept new unit.