Dallas, NC's Experts in AC Repair, HVAC Installation, Duct Cleaning, Insulation, Mold & Crawl Space Services

GSM Services has set itself apart with superior customer service, reliability, and quality of work for over 97 years in Dallas!

Proudly located in Gaston County, we’re your trusted, one-stop shop for complete home comfort solutions. We're a licensed & insured heating & air conditioning, crawl space, insulation, and air duct cleaning company in Dallas, NC.

Why Dallas Trust Us for Home & HVAC Services:

• ✅ Locally Owned for 97+ Years
• ✅ Fast & Reliable Service
• ✅ Affordable, Upfront Pricing
• ✅ Licensed & Insured Contractor
• ✅ FREE Service Calls with Repairs
• ✅ FREE Home Inspections & Quotes
• ✅ Award-Winning Customer Service
• ✅ 100% Satisfaction Guarantee
• ✅ Great Warranties
• ✅ Financing Options & Deals

Get an Online Quote for HVAC System Replacements & Duct Cleaning Services in Dallas

Get an free online quote for a new HVAC system or duct cleaning—just 30 seconds!

Duct Cleaning Services in Dallas:

Experience cleaner air with our comprehensive duct cleaning! We don’t just clean the vents—we inspect, sanitize, and ensure every part of your duct system is free of dirt and debris. Our service includes a disinfectant treatment to eliminate viruses, bacteria, and spores, ensuring a level of cleanliness that stands above the rest. Get an instant online quote and start enjoying a fresher, healthier home today!

We Offer These HVAC & Home Service Call Specials:

• FREE AC Service Calls with Repair
• FREE System Installation Quotes
• FREE Home Energy Audits
• FREE Crawl Space Evaluations
• FREE Insulation Evaluations

Heating & Air Conditioning Services in Dallas, NC:

• Furnace Installations
• Heating System Repairs
• Furnace Safety & Tune-Up
• HVAC Installation
• Air Conditioner Repair
• AC Cleaning & Tune Ups
• Heat Pump Services
• Mini Splits
• Thermostats
• Duct Work Repair
• Freon & Recharge
• Air Duct Cleaning

Crawl Space, Mold Removal, Insulation, Generators & Other Home Services in Dallas:

• Home Insulation
• Dryer Vent Cleaning & Repair
• Free Home Energy Audits
• Crawl Space Services
• Crawl Space Encapsulations
• Mold Remediation
• Humidity Control
• Standby Generators
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AC Repair & HVAC Service Technicians in Dallas, NC

If your Air Conditioning system isn’t working, GSM Services offers fast service and affordable repairs. Our certified HVAC technicians have decades of experience and will inspect your system to find the issue. We provide free service calls with repairs and a written estimate before any work begins, so there are no surprises. We service all types and models, and ensure reliable and cost-effective solutions.

Air Conditioning System Install & Replacement Services in Dallas, NC

Is your Furnace or HVAC system old or inefficient? Upgrading to a new, energy-efficient system can often save more in the long run than constant repairs. Let our certified team guide you through the latest HVAC technology options for a cost-effective upgrade that enhances comfort and efficiency! Our top-of-the-line units offer exceptional comfort, ultra-quiet operation, and improved air quality, with high-efficiency options that can cut energy costs by up to 30%. Trust our HVAC experts for reliable advice and outstanding service. Call or book online today for a free quote on a new system!

Cost of a New HVAC System in Dallas, NC:

Try our system cost calculator to see the cost of replacing your home’s heating & air conditioning system. Simply answer a few questions about your home, and receive a custom quote in just 30 seconds.

GET ONLINE QUOTE NOW

Dallas Crawl Space Repair & Service Contractors

Searching for reliable crawl space contractors in Dallas, NC? GSM Services offers expert crawl space solutions, including moisture control, insulation, encapsulation, and mold removal. Our team safeguards your home from moisture damage and mold growth, enhancing air quality, improving energy efficiency, and reducing pests in your home. A healthy crawl space also contributes to greater structural stability and comfort. Easily book a free crawl space inspection and quote online today if you're experiencing any issues!

Book Free Crawl Space Inspection


Crawl Space Services & Solutions:

• Crawl Space Mold Removal
• Crawl Space Encapsulations
• Crawl Space Cleanings
• Crawl Space Insulation
• Crawl Space Dehumidifiers
• Vapor Barrier Installations
• Sump Pumps & Water Removal
• Crawl Space Doors
Book Free Crawl Space Inspection

Home Insulation Company in Dallas, NC

Looking for a trusted home insulation company in Dallas, NC? GSM Services specializes in high-quality insulation solutions that improve energy efficiency, reduce utility costs, and enhance indoor comfort. Our expert team provides professional insulation installation, helping keep your home comfortable year-round. Serving Dallas and surrounding areas, we’re committed to delivering reliable, energy-saving solutions for every home. Contact us today for a free insulation inspection and quote!

Types of Insulation

• Blown-in Fiberglass
• Blown-in Cellulose
• Rigid Foam
• Injection Foam
• Radiant Barrier
• Sealing Air Leaks
• Air Duct Sealing

Areas of Home

• Attic Insulation
• Basement Insulation
• Crawl Space Insulation
• Garage Insulation
• Wall Insulation
• Floor Insulation
• Ductwork Insulation
Book Free Insulation Inspection Online

Photo Galleries From Dallas



Finished project



Finished project



Crawl Space Encapsulation Completed

News & Events From from Dallas

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Save Energy on Heating with This List

High energy bills can come as a surprise in the winter. In our service area, air conditioners see a lot more use than heaters. When temperatures drop, homeowners might feel relieved as bills start to lower as well-until the heater becomes more and more of a necessity.... [Read more]

More News & Events

Work Requests From Dallas, NC

• Project Location: Dallas, NC
  My AC is not working like it should. Came home yesterday to my house 78 degrees, it was set for 73. It was blowing out but not cool air. Changed my filter. When I woke up this AM it had came down to 75 degrees. Thanks
• Project Location: Dallas, NC
  You do my every 6 month service. My indoor part of my ac is leaking water so it's off and I have no ac. I want to replace my whole heating and air system so that it's all outside. It's a 4 ton unit and you have all the info on it. I need a cost please
• Project Location: Dallas, NC
  Tune up/system service for summer
• Project Location: Dallas, NC
  Estimate on Geothermal Heat Pump Installation
• Project Location: Dallas, NC
  My outside unit is old and has been going out. I've had a lot of work done on it over the years, but I feel it is time to replace the unit. I can't afford to pay upfront and was wondering if you have financing available?
• Project Location: Dallas, NC
  Hello, recently I had another business come and replace a fan motor and blade on an HVAC unit. It is now been making a very loud noice when turned on. The other business said they tried everything to quiet it down but they couldn't stop it or make it quieter. How much does it cost to come and look at the unit?We do need to replace our units they are 20 years old but I am unsure we can afford it right now. Thank you.
• Project Location: Dallas, NC
  Coils need to be cleaned, AC much cooler downstairs than up. Additional information: Date requested: 05/25/2020
• Project Location: Dallas, NC
  Looking to get a mini split system installed
• Project Location: Dallas, NC
  I just wanted to get a quote for duct cleaning for single story house. 10 vents, 1 return , was told that there are 3 main ducts under house instead of one main with ducts branching off. Please email me with a quote. Thank you
• Project Location: Dallas, NC
  Schedule a pre-paid cooling precision tune-up
• Project Location: Dallas, NC
  Generac full home generator assessment, quote, installation & service.
• Project Location: Dallas, NC
  Moisture and water intrusion in my crawl space
• Project Location: Dallas, NC
  I was interested in obtaining an estimate for maintenance for my a/c unit. As of right now, I do not have it serviced regularly but would like to if it is not too expensive.
• Project Location: Dallas, NC
  2 items. At the moment, my air is not functioning very well - may be low on freon and needing a recharge, at least it feels that way. Also, I'd like to get an estimate on a new heat pump split system. My current system is 20+ years old so it's way past time. Probably won't need new duct work, but it's possible they would need to be sealed up some. Thanks.
• Project Location: Dallas, NC
  We just bought a home and would like to have the hvac serviced to make sure it runs well through the summer.
• Project Location: Dallas, NC
  Our utilities bill is too high and want to reduce it.
• Project Location: Dallas, NC
  No heat. May be self-inflicted. Tried to replace the thermostat and now neither heat or a/c will come on. Rudd heat pump / ac unit less than 1 year old. Can we get service today? Tenants will need heat tonight. Thanks!
• Project Location: Dallas, NC
  Like to know that cost of duct cleaning
• Project Location: Dallas, NC
  Follow up Inquiry for crawlspace rennovation. Checking in again about pricing options. We've spoken previously about these matters.

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