Furnace Repair, HVAC Install & Replacement in Mount Holly, NC
For 99 years, GSM Services has been the trusted choice for AC & Furnace repair, HVAC replacement, installation, & maintenance in Mount Holly, NC. Our certified HVAC technicians deliver fast, affordable & reliable service. Schedule your Heating service online in seconds!
- ✅ FREE Service Calls with Repairs
- ✅ Furnace Tune-Up Deals
- ✅ Instant HVAC Quotes
- ✅ Insulation, Crawlspace & Air Quality
- ✅ Voted Best HVAC Company in Gaston County
🔥 $98 Furnace Tune-Up & Safety Check
We’ll thoroughly inspect, clean, and test your system—giving you peace of mind all winter long!
Why Locals Choose GSM Services:
- ✅ Fast, Affordable & Reliable
- ✅ Licensed and Insured
- ✅ Locally Owned for 99+ Years
- ✅ Voted Best Heating & Cooling Company
- ✅ 100% Guaranteed Satisfaction
- ✅ Outstanding Warranties
- ✅ Unbeatable Financing for Any Budget
- ✅ FREE HVAC Service Calls with Repairs
- ✅ FREE System Quotes
- ✅ FREE Insulation, Crawlspace and Home Energy Audits
Duct Cleaning & Furnace System Prices in Mount Holly, NC
Need HVAC or duct cleaning? Get your free instant quote online in just 30 seconds!
How Much Does a New Heating & Cooling System Cost in Mount Holly, NC?
The cost of a new HVAC system in Mount Holly, NC typically ranges from $8,000 to $20,000+ in 2026, depending on the size of your home, the efficiency of the system, ductwork requirements, and installation complexity.
Want to know what a new Furnace may cost for your home? Use our HVAC Cost Calculator to get instant Heating System replacement pricing in Mount Holly, NC. Compare system options, estimated monthly payments, and personalized HVAC installation costs in minutes—before scheduling an in-home consultation.
Heating & Cooling Services in Mount Holly, NC:
Insulation, Attic & Crawlspace, Generators & Other Home Services We Offer in Mount Holly, NC:
Furnace Repair in Mount Holly, NC
If your Heater isn’t working, trust GSM Services for fast, affordable Furnace repair in Mount Holly, NC. Our licensed HVAC technicians service all makes and models, provide expert solutions, and offer clear, upfront pricing with no hidden fees. We also include a free service call with any repair.
HVAC Replacement in Mount Holly, NC
Looking for a New Heating System? Our licensed HVAC installers in Mount Holly, NC are certified experts in energy-efficient heating & cooling systems that can lower your energy bills by up to 30%. We’ll walk you through the latest AC options and help you choose the right system for improved comfort, quieter operation, and cleaner indoor air. Call or book online today for a free, no-obligation consultation and quote!
Certified Service For All Types of Heating & Cooling Systems
- Central Heating & Air Conditioning Systems
- Ductless Mini Splits
- Package Systems
- Heat Pump Systems
- Gas furnaces
- Oil furnaces
- Electric Furnaces
Duct Cleaning in Mount Holly, NC
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!
Home Insulation Services in Mount Holly, NC
GSM Services is your trusted local insulation company in Mount Holly, NC. We provide high-quality, affordable home insulation for attics, walls, crawl spaces, basements, floors, garages and more. Our certified experts use various insulation types to fit your home and budget, helping reduce energy bills and improve comfort and air quality year-round. Experiencing uneven temperatures or high utility costs? Schedule your free insulation inspection today! We’ll assess current insulation, check for air leaks or moisture issues, and provide a custom, no-obligation quote for your home. Call or book online now!
Mount Holly, NC Crawl Space Repair Services
GSM Services provides professional crawl space services in Mount Holly, NC. Our team protects your home from moisture damage and mold, enhancing air quality, boosting energy efficiency, and reducing pests. A well-maintained crawl space also strengthens structural stability and overall comfort. Book a free crawl space inspection and quote online today!
Crawl Space Solutions:
- Crawl Space Mold Solutions
- Crawl Space Encapsulations
- Crawl Space Cleanings
- Crawl Space Insulation
- Crawl Space Dehumidifiers
- Vapor Barrier Installations
- Sump Pumps & Water Removal
- Crawl Space Doors
Photo Galleries From Mount Holly
High efficiency GSM TruComfort air conditioner installation.
Trucomfort hybrid split system installation
Job Stories From Mount Holly, NC
New Installation Multiple Furnace Systems - Local Church
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.
Work Requests From Mount Holly, NC
- Project Location: Mount Holly, NC
Dryer isn't drying well, but it gets hot. Thinking I may need to have the dryer vent cleaned. Thanks! Additional information: Date requested: 09/08/2021 - Project Location: Mount Holly, NC
We would like to start having regular cleaning and maintenance. - Project Location: Mount Holly, NC
Looking for a spray foam quote in attic space. Also, the removal of current blown fiberglass. - Project Location: Mount Holly, NC
1. Regular service - need filter replaced in my AC unit. I would like to set up the ESA for tune-ups in spring/summer and fall/winter for 2020. Service tech will require a ladder as my unit is in my attic. 2. AC is struggling to cool the past few days. Would like it inspected as part of regular service. Would like to set up inspection for Monday 6/8 in the afternoon or Wednesday 6/10 in the morning. Additional information: Date requested: 06/08/2020 - Project Location: Mount Holly, NC
Summer tune up - Project Location: Mount Holly, NC
Would like to get a quote for replacing a 5 ton heat pump at our shop facility. - Project Location: Mount Holly, NC
HEATING SYSTEM WON'T COME ON - Project Location: Mount Holly, NC
I need a air conditioner for our half basement - Project Location: Mount Holly, NC
Air-conditioning fan on outside unit will turn on but no air is coming through vents inside the house - Project Location: Mount Holly, NC
Two units upstairs aren't cooling - Project Location: Mount Holly, NC
Need new equipment for HVAC on main level of home - Project Location: Mount Holly, NC
I need someone to come and service my Mitsubishi outside unit. I believe there might be a leak. - Project Location: Mount Holly, NC
Would like estimate on replacing existing AC - Project Location: Mount Holly, NC
Heat pump is functioning but makes a lot of noise that's audible from inside the wall. Does not make noise when just the fan is running. Additional information: Date requested: 03/14/2019 - Project Location: Mount Holly, NC
Interested in a quote for a whole house standby generator. - Project Location: Mount Holly, NC
Looking at replacement HVAC system - Project Location: Mount Holly, NC
Need the furnace replaced for the bonus room over the garage. The a/c part of the unit still works. thanks! - Project Location: Mount Holly, NC
Need quote for new HVAC. Current system won't cool when outside temp is above 80. - Project Location: Mount Holly, NC
My AC unit iced over. Additional information: Date requested: 06/25/2018 - Project Location: Mount Holly, NC
Bonus room surrounded by attic space. Room temp climbs to upper 70's when outside temp gets to upper 80's. Air temp coming out of vents is 58-59 at night but climbs to 68-70 once outside temp gets to upper 80's. Concerned about duct leakage and general temp and ventilation of attic.
See all work requests
Serving the following Mount Holly, NC zip codes
28012 & 28120
Products & Services
HVAC Systems
- air conditioning company
- air conditioning systems
- HVAC Replacements
- central air conditioning
- ductless air conditioning
- gas furnace
- geothermal heating and cooling
- HVAC tune ups
- high-efficiency HVAC systems
- ductless heating systems
- HVAC companies
- furnace installation
- furnace repair
- AC installation
- AC repair
- heat pump installation
- heat pump repair
Crawl Space Repairs
- crawl space encapsulations
- crawl space vapor barrier
- crawl space cleanings
- dehumidifers
- crawl space inspections
Home Energy Audits
- energy efficiency audit
- air leakage testing
- blower door testing
- crawl space inspection
- attic inspection
- insulation inspection
Home Generators
- generator installation
- generator repair
- generator service
Home Insulation Services
- attic insulation
- insulation installation
- insulation inspections
- insulation removal
- insulation company
- blown in insulation
- cellulose insulation
- duct insulation
- green insulation
- insulation contractors
- pipe insulation
- reflective insulation
- rigid foam insulation
- roof insulation
- wall insulation
- window insulation
- Crawl Space Insulation
- radiant barrier insulation
Air Sealing
- sealing air leaks
- air duct leakage
- air duct sealing
- air leakage testing
- door air seal
- window air leakage
Air Duct Cleaning
- duct cleaning services
- duct disinfectant spray treatment
- air vent cleaning
Ductwork
- ductwork repair
- ductwork installation
- ductwork cost
- furnace ductwork
- HVAC ductwork
- duct cleaning
Dryer Vent Cleaning
- dryer vent cleaning services
- dryer vent replacement
Before and After Pictures from Mount Holly
Before and After Condenser Cleaning
Company Awards
2026 Best Heating & AC Company
GSM Services Named 2026 Best of Gaston Winner for Best Heating & Cooling Company.
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.
Recent Jobs and Reviews in Mount Holly, NC
Mount Holly, NC at a glance
GSM Services has completed 17 jobs in Mount Holly, NC between December 2021 and April 2025.
The most recent job was on April 15, 2025.
GSM Services has completed 1 job in Mount Holly, NC in the last 12 months. The first job there was in December 2021.
Job Locations and Reviews
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 new package unit
Package Unit Call, Performed an installation of a Goodman Package Unit.
Dryer Vent Call, Before and After of a Dryer Vent Cleaning
AC call, Installed a new S Series Amana Unit
Furnace & AC Install, TruComfort AC & Furnace Installation
Mini Split AC Installation. AC install.
Amana AC Install. New Air Conditioning Unit.