For over 98 years, GSM Services has made home comfort easy with trusted service, reliable solutions, and top-quality work in Gaston County. As a locally owned, licensed, and insured home comfort expert, we provide heating & cooling, insulation, air duct cleaning, and crawlspace services to improve comfort, air quality, and energy efficiency. Enjoy easy online booking, instant quotes, and free service calls with any repair!
Need a new air conditioning system or duct cleaning services? Get a free instant quote online in just 30 seconds!
GSM Services specializes in energy-efficient heating and cooling system installations that enhance your home's comfort and save on energy costs. Our certified professionals ensure a smooth, reliable experience from start to finish. Book a FREE consultation online in seconds to explore ultra-quiet, high-efficiency systems that boost comfort, improve air quality, and lower energy bills. With clear pricing, flexible financing, and industry-leading warranties, upgrading your heating system has never been easier!
At GSM Services, our certified HVAC technicians inspect, service, repair, and replace all heating & cooling systems, any brand or model. Need a furnace repair? We'll waive the $69 diagnostic fee with your repair! Our licensed experts offer fast, affordable service, pinpointing issues with thorough inspections. Enjoy free service calls with repairs, upfront written estimates, and no surprises. All repairs come with outstanding warranties for your peace of mind.
Struggling with moisture, mold, or damage in your crawl space? We’re here to help! Our experts transform crawl spaces into healthy, energy-efficient spaces. Get a FREE Crawl Space Inspection today! We will check the humidity level, look for any mold or growth, inspect your home's insulation and air duct system, air leakage, air quality and more! We can provide you different solutions to create a healthy, comfortable, and safe environment under and inside your home.
We offer many insulation services such as insulation removal & insulation installation. As a full-service insulation contractor, GSM Services provides services to improve areas such as walls, crawl spaces, basements, and garages.
If you are in need of insulation services, let us perform a free inspection at your home! We will check the insulation levels, moisture levels, check for air leaks, inspect duct work, look for any growth, issues and more! We will take pictures of any concerns and give you a free, no obligation quote to offer solutions. At GSM Services, we are Mount Holly's trusted, local insulation company.
Our duct cleaning services thoroughly clean your entire duct system—not just the air vents—to ensure optimal air quality and system efficiency. We start with a full inspection, checking for tears, leaks, or any issues that could affect performance. Our comprehensive cleaning service includes a special disinfectant spray treatment to leave your ducts fresh and sanitized. Get a free, instant online quote in seconds and breathe cleaner air with our professional duct cleaning services!
From residential to light commercial our residential heating and cooling division will help keep your home or business comfortable. We recently completed a 5 unit furnace installation at a local Church in Mount Holly, NC.
Give GSM a call for a free estimate for new installations on heating and cooling systems for light commercial and residential homes.
28012 & 28120
2025 Best Heating & Cooling Company
GSM Voted 2025 Community Choice Award Winner.
2024 Community Choice Award Winner
Voted Best Local HVAC Company in 2024.
2023 Community Choice Award Winner
Voted Best Heating & AC Company & Best Home Service Provider in the county.
Best of Gaston 2022
GSM Services won Best Heating & Cooling Company and Top Place To Work in the County!
Best Contractor to Work For - ACHR News
Named Best Contractor to Work For by ACHR News, a leading national industry publication in 2021.
Top Place to Work in Charlotte
GSM was recognized as one of the Top Places to Work in 2019 by The Charlotte Observer.
Outdoor unit cleaning before and after
Air Conditioner Cleaning before and after
Attic Insulation Before and After
20 Mil Crawl Space Encapsulation with mold removal
Crawl Space Door Replacement
Generator Call, Performed an installation of a new Generac generator
Furnace Call, Performed an installation of a new furnace
Crawl Space Call, Performed an installation of a Sante Fe Dehumidifier
Heat Pump Call, Performed a changeout of a heat pump
Guttering Call, Performed an installation of gutters
Package Unit Call, Performed an installation of a Goodman Package Unit.
Dryer Vent Call, Before and After of a Dryer Vent Cleaning
Furnace & AC Install, TruComfort AC & Furnace Installation