AC replacement in Gastonia NC & nearby areas.
AC Repair Service Gastonia NC | GSM Services
Heating & Cooling • Insulation • Crawlspace Services • Mold Removal • Energy Audits • Generators • Air Duct Cleaning • Furnace • HVAC Repair & Installation
Heating & Cooling • HVAC • Insulation • Crawlspace Repair • Mold Removal • Energy Audits • Generators • Vent & Duct Cleaning
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Denver, NC HVAC & Home Services

AC Repair, Air Conditioning Installation, HVAC Duct Cleaning, Insulation, Mold Removal & Crawlspace Service Experts in Denver, NC

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

We are your one stop shop for home comfort solutions. We're a licensed & insured heating & air conditioning contractor, hvac duct cleaning, crawl space experts, & insulation pros in Denver. We help people live better through improved home comfort, air quality, and energy efficiency.

If you are in need of repair, installation, tune up, or any other heating & cooling, crawl space, insulation, home mold solutions, or air duct cleaning services you are in the right place!

Get an Online Quote for HVAC Installations & Duct Cleaning Services in Denver

Try our free, online price calculators. Get a quote for your home in 30 seconds!

We Offer The Following Home & HVAC Service Calls in Denver, NC

Fast & Affordable Heating Service Specialists in Denver, NC

If your furnace won't turn on, if there's a leak, if the blower isn't working or if you want regularly scheduled maintenance, you are in the right place! GSM Services has a dedicated and devoted team of furnace service professionals with decades of combined experience. Our trained technicians can provide a prompt and thorough inspection of your unit to determine the problem and suggest the solution. Our furnace service team provides FREE written estimates for all potential furnace repairs so you will never be surprised by the bill. Also, we provide furnace service for all types and models, including natural gas, oil, electric and propane. Don’t hesitate to contact us today, call or click to schedule your furnace service appointment with GSM Services!

Benefits of regular furnace service:

  • Optimal home comfort
  • Reliable performance
  • Better furnace efficiency
  • Extended life
  • Lower repair costs & increased energy savings

Proven Furnace Installation Experts

If your furnace is old or your bills seem too high, replacing your furnace will be the best option. Basic usage compromises your unit over time and keeping a damaged or old furnace may be costing you more money than installing a new unit. Our certified and highly trained team of furnace installation professionals can provide a thorough inspection of your unit to help you make that decision. Our skilled experts can replace all types of units with high-quality and energy efficient models that are guaranteed to lower your energy bills by as much as 30%. Trust our furnace installation professionals to provide you with reliable services every step of the way. Call or click today to schedule your FREE furnace installation estimate!

We install a variety of types of furnaces:

  • Gas furnaces
  • Oil furnaces
  • Electric furnaces
  • Propane furnaces
  • Heat pump systems

Denver's Dependable Home Insulation Professionals

We specialize in a variety of home insulation services that are aimed to lessen your home's carbon footprint and save energy and money each month! We offer it all, from air sealing to ductwork to various types of insulation services such as blown in fiberglass, cellulose, injection foam, and more in Denver, NC. We understand that you need to use the correct type of insulation in your home, and it needs to be placed in the correct areas.

Before we perform any insulation work in your home, we first take the time to conduct a custom home energy audit. The audit is used to figure out what the root cause of your energy woes, and gives us an idea of what the best method would be to fix it. At GSM Services, we not only test and investigate your home's energy usage, but we will discuss and prioritize the proper repairs. You'll know which ones will save you the most energy and why. This will also help direct you in making the best decision for you and your family.

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

Crawl Space Experts

Welcome to GSM Services – the leading experts in crawl space restoration and repair. Is your crawl space causing issues such as moisture, mold, or structural damage? Don't worry; you're in the right place. We specialize in turning crawl space nightmares into healthy, functional, and energy-efficient spaces. We offer FREE Crawl Space Inspections. 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. Some of the crawl space services we offer are Whole Home Dehumidifiers, Crawl Space Encapsulations, Vapor Barrier, Crawl Space Insulation, Crawl Space Cleaning & Air Sealing, Sump Pumps, Crawl Space Mold Removal, Crawl Space Door Replacements, and much more. Schedule your Free Inspection today!

Air Conditioning Repair, Installation, & Service Company

Here at GSM Services, our skilled technicians can inspect your air conditioning system and provide the right services to prolong the life of your cooling system and keep your home comfortable. We provide repair and maintenance services for all brands and models of central and ductless air conditioners.

Our Air Conditioning Services Include:

  • Air conditioning tune-ups & maintenance
  • Air conditioning repair
  • Air conditioning system replacement
  • Refrigerant replacement
  • Thermostat repair & replacement
  • Ductless air conditioning
  • Central air conditioning

Comprehensive Home Energy Audits

Our team of home energy take the time to carefully examine your home and can provide comprehensive home energy audits that identify the areas that need improvement. Once we finalize the test, we will sit with you and show you exactly what was found and giving you a prioritized list of list of home energy tasks. Our custom home energy audits allow us to help homeowners improve the overall energy efficiency of their home's and can help save you money!

Evaluations Include:
  • Air Leak Inspection
  • Thermal Scanning
  • Detailed Explanation
  • Blower Door (Infiltrometer) Test
  • Insulation Level Check
  • Appliance & Lighting Checks
Photo Galleries From Denver

Full crawl space encapsulation; dehumidifier; silver-glo treatments in knee walls; air sealing; blown in insulation. A full comfort and energy upgrade job. Homeowner is already feeling better comfort!

Wow you wouldn't believe the situation here with a new house! Do you ever smell a stagnant smell in your new home? Consult the professionals here at GSM where we provide comfort and peace of mind every call, every customer, everyday!

Work Requests From Denver, NC
  • Project Location: Denver, NC
    Air unit is frozen
  • Project Location: Denver, NC
    We are interested in obtaining a Home Energy Audit
  • Project Location: Denver, NC
    I am looking for quotes on a new HVAC system.
  • Project Location: Denver, NC
    My upstairs AC unit does not keep the area cool. Trying to determine if I need more insulation, improved ventilation or a new AC unit.
  • Project Location: Denver, NC
    New heat pump
  • Project Location: Denver, NC
    Purchased a home recently: do I need more insulation in the attic?
  • Project Location: Denver, NC
    We have lived in our new house for going on 2 years and we are still getting used to our hybrid propane / electric heating system. We paid about $2,300 this past year on propane which seems like we're throwing away our money. Therefore, we are wondering if it's possible to switch the hybrid system to stay on electric heating regardless of how cold it gets outside (I think once it gets cold enough the propane kicks on) but still have the propane for our gas fireplace. I read somewhere that you can adjust the amount of propane used for heating? All of this is new to us. Is this something that can be done? And can you guys help us out with this?
  • Project Location: Denver, NC
    Attic insulation and Shed insulation
  • Project Location: Denver, NC
    Hello, I am interested in the silver plan for regular check ups. The math of $14.95 monthly equals $180 but your website shows $194. Each plan you offer the monthly charge does not equal the annual charge if you could please explain the difference. I am interested in a heat system service in the next week if possible. Thank you!
  • Project Location: Denver, NC
    Interested in a quote to replace 16 year old Trane AC unit that has stopped working and will not cool house.
  • Project Location: Denver, NC
    Request quote for blown in insulation for our 24x56 mobile home. Would like to have this done sometime this summer. Please send via email as it is difficult for me to answer my personal phone during the day. Thanks!
  • Project Location: Denver, NC
    Would like to have a second floor overhang insulated w/ spray foam, but do not know the cost. Existing home, overhang area is 40'(L) x 2' (W) x 1' (D), and overhang is accessible and currently without insulation nor house wrap.
  • Project Location: Denver, NC
    Approximately 14000 sq ft commercial roof repair/replace. Roof leaks badly and needs repair. I need a detailed professional estimate and bid. Please contact me for further information.
  • Project Location: Denver, NC
    We need a new HVAC system and would like a quote
  • Project Location: Denver, NC
    Need quote to have French drain added inside crawlspace and have crawlspace and sealed
  • Project Location: Denver, NC
    Contractor forgot to install insulation between basement family room and main floor family room. Can you blow in insulation? Intent was mainly for sound deadening. Room is approx. 23' x 23' and finished.
  • Project Location: Denver, NC
    Interested in a quote to have the unerside of my roof deck sprayed with foam 1974 double wide with a 2/12 pitch
  • Project Location: Denver, NC
    I have two air units. The upstairs until in working properly. The downstairs unit will turn on but no air comes out of the vents. Need assistance
  • Project Location: Denver, NC
    Would like to schedule the $98 precision cooling tune up
  • Project Location: Denver, NC
    Would you please advise the cost of a home energy audit. I don't know if it depends on the size of the house, but if so, our house is approx 4200 sq. ft. Thanks much. Leslie
See all work requests
Products & Services
HVAC Systems
  • air conditioning company
  • air conditioning systems
  • 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
  • air conditioning installation
  • air conditioning repair
  • heat pump installation
  • heat pump repair
Crawl Space Repairs
  • crawl space encapsulations
  • crawl space vapor barrier
  • crawl space cleanings
  • mold removal
  • 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 repair
  • ductwork installation
  • ductwork cost
  • furnace ductwork
  • HVAC ductwork
  • duct cleaning
Dryer Vent Cleaning
  • dryer vent cleaning services
  • dryer vent replacement
Company Awards

2023 Community Choice Award Winner - Best of Gaston

2023 Community Choice Award Winner

GSM Services was voted Best Heating & AC Company & Best Home Service Company in the county.

2022 Best of Gaston

Best of Gaston 2022

GSM Services won Best Heating & Cooling Company, Top Place To Work, & Best Home Service Company

Best Contractor to Work For

2021 Best Contractor to Work For - ACHR News

GSM Services was named 2021 Best Contractors to Work for by National ACHR News

2021 Best of Gaston

Best of Gaston 2021

GSM Services won Best Heating & Cooling Company, Top Place To Work, & Best Home Service Company

Best of Gaston 2020

Best of Gaston 2020

GSM Services was incredibly honored to win Best HVAC Company, Best Roofing, Best Customer Service, Best Home Service Company

top place to work charlotte

Top Place to work Charlotte 2019

GSM was voted as one of the top places to work in 2019 by the Charlotte Observer.

2019 Best of Gaston

Best of Gaston 2019

Best of Gaston 2019 Winner for Best Heating & Air Conditioning Company and also Best Home Repair Company

Recent Jobs and Reviews in Denver, NC

Job Locations and Reviews

Dryer Vent Call, Before & After of a dryer vent cleaning
Dryer Vent Call, Before & After of a dryer vent cleaning
Naomi H.
Naomi H. Checked in
Dryer Vent Call, Before & After of a dryer vent cleaning
Denver, NC 28037
Installation Call, Performed an changeout of unit, installing two Mitsubishi mini split systems.
Installation Call, Performed an changeout of unit, installing two Mitsubishi mini split systems.
Install T.
Install T. Checked in
Installation Call, Performed an changeout of unit, installing two Mitsubishi mini split systems.
Denver, NC 28037
Denver, NC - Generator Call, Performed an installation of a Generac Generator.
Install T.
Install T. Checked in
Generator Call, Performed an installation of a Generac Generator.
Denver, NC 28037
Denver, NC - Phenomenal Aire installation. Air Purification in Denver, North Carolina.
Install T.
Install T. Checked in
Phenomenal Aire installation. Air Purification in Denver, North Carolina.
Denver, NC 28037