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Products & Services

HVAC Systems
air conditioning contractors
air conditioning systems
central air conditioning
ductless air conditioning
gas furnace
geothermal heating and cooling
heating and cooling systems
high-efficiency furnace
home heating systems
HVAC companies
hydronic heating systems
air conditioning installation
air conditioning repair

Crawl Space Insulation

Home Energy Saving & Audit
energy efficiency audit
energy saving devices
energy saving products
energy saving tips
home energy audit
home energy conservation


Home Insulation
attic insulation
blown in insulation
cellulose insulation
duct insulation
green insulation
insulation contractors
pipe insulation
reflective insulation
rigid foam insulation
roof insulation
wall insulation
window insulation

Water Heaters
gas water heaters
high-efficiency water heater
hot water heaters
indirect water heater
instant hot water heater
on demand hot water heaters
solar water heater
tankless water heaters
water heater installation
water heater replacement

Air Sealing
sealing air leaks
air duct leakage
air duct sealing
air leakage testing
door air seal
window air leakage

Radiant Barrier
radiant barrier insulation
radiant barrier cost
roof radiant barrier

ductwork repair
ductwork installation
ductwork cost
furnace ductwork
HVAC ductwork
Duct Cleaning

Dryer Vent Cleaning

Before and After Pictures from Bessemer City
Gas Pack replacement in Bessemer City

Gas Pack replacement in Bessemer City

Before After
Gas Pack replacement in Bessemer City Gas Pack replacement in Bessemer City

We replaced the gas packaged unit, and reconnected the existing ducts.

GSM_SG Elite Air Tight Door

GSM_SG Elite Air Tight Door

Before After
GSM_SG Elite Air Tight Door GSM_SG Elite Air Tight Door

On a recent crawl space encapsulation, we installed a Elite Air Tight Door to complete the sealing of the renovated crawl space.

New Crawl Space Door installed in Bessemer City, NC

New Crawl Space Door installed in Bessemer City, NC

Before After
New Crawl Space Door installed in Bessemer City, NC New Crawl Space Door installed in Bessemer City, NC

We enclosed the crawl space with a new encapsulation sealing the crawl space from the outside air.  We installed our SG series crawl space door to seal off the crawl space to ensure complete encapsulation.

Company Awards
Best of Gaston 2020
GSM Services was incredibly honored to win multiple titles this year for the 2020 Best of Gaston Awards! Thank you... [Read more]
Top Place to work Charlotte 2019
GSM was voted as one of the top places to work in 2019 by the Charlotte Observer.... [Read more]
Best of Gaston 2019
We won Best of Gaston 2019 for Best Heating & Air Conditioning Company and also Best Home Repair Company by... [Read more]
More Awards

Bessemer City, NC's Trusted Insulation, Heating & AC Repair Contractor

I will be glad to tell others of your company and the friendly people that work for you....
Happy Customers Surrounding Bessemer City, NC
Work Requests

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Reviews From Bessemer City
Testimonials From Bessemer City
I am enjoying my unit so far. Everything Greg told me would be done, it was done.
Testimonial by Gail B. from Bessemer City, NC
Very pleased with your professional attitude.
Testimonial by Jim M. from Bessemer City, NC
We are in our 80's and very careful about who comes to our home.
Testimonial by Gloria L. from Bessemer City, NC

Fast & Affordable Heating Service Specialists

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

Air Conditioning Service & Repair Experts

Your home's air conditioning system is designed to provide you and your family with comfort by keeping your home at an enjoyable temperature. Over years of use, the system will go through wear and tear that may lead to serious problems if they are neglected. Regular maintenance such as replacing the blower filter, removing debris and cleaning the fins can extend the life of the unit and ensure it is running as efficiently as possible. It is always a good idea to schedule an air conditioning service before the hot weather begins, or before you detect any problems with your air conditioning system. GSM Services has an experienced team of HVAC technicians that are licensed and certified to service all air conditioner makes and models.

If your home's air conditioning system is not performing as it's supposed to call GSM Services today and make an appointment. Our staff is capable of quickly identifying issues with your unit and also making the correct repairs. We pride ourselves on being fast and efficient because we understand the importance that your air conditioning unit has when it comes to keeping you and your family comfortable in the warmer months. To make sure your air conditioning repairs are done right the first time, call or click today!

Bessemer City’s Leading Air Conditioning Installation Company

Is it time to replace your existing air conditioning system? If your home currently doesn’t have central air, or if your existing AC system is old, unreliable and costly to run, you’ve come to the right place. GSM Services can design and install a new air conditioning system that will be just right for you and your home. We only install high-efficiency, ENERGY STAR® equipment, so we ensure it doesn’t cost too much to maintain a comfortable temperature in your home. Contact GSM Services for an estimate for air conditioning installation today! We provide free estimates throughout our North Carolina service area, which includes Huntersville, Gastonia, Mount Holly, Fort Mill and surrounding areas.

Crawl Space Insulation Contractor

You may think that the crawl space holds little significance to your home but in our opinions, the crawl space is one of the most important parts of your home. Homeowners usually don’t spend much time in these shallow structures that must be crawled into, hence the name, but if you spend enough time in them like our crew members then the importance becomes clear. At GSM Services we commonly see crawl spaces that are installed directly into the dirt under your home. These crawl spaces can often be disastrous because they tend to soak up the natural cold of the earth and transfer it into the air in your crawl space. If you have utilities in your crawl space such as your water heater, furnace, or hot water pipes, your energy bills will suffer. The fluctuation in temperature will force your heating and air conditioning systems to work harder, causing your energy costs to rise.

For your crawl space insulation to perform like it should, it's essential to install the right type of insulation, the right amount of insulation, and use the correct installation technique. At GSM Services, we can improve the condition of your crawl space and the living spaces above with products that are durable, long-lasting, and made especially for the crawl space environment.

Types of Insulation
  • Blown-in Fiberglass
  • Blown-in Cellulose       
  • Rigid Foam
  • Injection Foam
  • Radiant Barrier  
  • Sealing Air Leaks
  • Air Duct Sealing            
Areas of Home
Job Stories From Bessemer City, NC
Crawl Space Encapsulation

 Installation of a Smart Sump - installed SmartDrain EZ-pipe around the perimeter to drain all water to the low end, then installed a SmartSump to pump out the water to catch basin.

Completed the encapsulation with SiilverGlo insulation, to completely air seal and insulate the crawl space to fix all problems created below the house.

SaniDry CX- Installed a commercial grade SaniDry dehumidification system and drain to outside.

Completed the crawl space with a GSM-SG series Elite Air Tight Door. 



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Work Requests From Bessemer City, NC
Project Location: Bessemer City, NC
Annual tuneup four heating and cooling systems
Project Location: Bessemer City, NC
Quote needed for installation of air conditioning or heating and air package unit. House built in 1972 and has never had air conditioning installed. Duct work would need replacement and insulated. Thank you.
Project Location: Bessemer City, NC
Just need a summer checkup.
Project Location: Bessemer City, NC
Quote needed for installation of air conditioning or heating and air package unit. House built in 1972 and has never had air conditioning installed. Duct work would need replacement and insulated. Thank you.
Project Location: Bessemer City, NC
Our a/c unit is 35 years old. We have had a repair guy look at it the past few years and he claims he has put a "band aid" on the repairs but we need a new unit. It worked last year and we have not turned it on this year so far. I would like a 2nd opinion to see what my options are as far a repair/replacement unit.
Project Location: Bessemer City, NC
My A/C is set to 69 and isn't cooling the house lower than 75. New homeowner, and unit is brand new.
Project Location: Bessemer City, NC
I have a 20 yr old unit that sweats under my house. I am interested in new package unit if possible and ducts. Presently have a heat pump split unit.
Project Location: Bessemer City, NC
Need a new heat and air system for 1500 square feet. Would like to get a quote and see if I can get it financed. Currently NO heat except small electric heaters and cool/heat window unit that puts out cool air.
Project Location: Bessemer City, NC
We have an unconditioned basement which we'd like to add a ductless system to so its more comfortable.
Project Location: Bessemer City, NC
Needing a new unti ours has stopped working needing to finance
Project Location: Bessemer City, NC
We are looking to replace our heat/air unit. We have a 900 sq ft house that we are selling within the year. We are not wanting to put a whole lot of money into the unit. Please contact for a quote for an AC unit for 900 sq ft house.
Project Location: Bessemer City, NC
Need quote on whole house generator 1750 sq ft house. Propane system.
Project Location: Bessemer City, NC
Our air is blowing, but isn't cooling. It's at least 90 degrees in the house now. There was a car accident in our area early this morning and the power was out several hours, and we are wondering if that had anything to do with our air not working properly. It's an old system and may need freon. Can someone come out as soon as possible? Thank you.
Project Location: Bessemer City, NC
Air is not cold. Possibly need freon
Project Location: Bessemer City, NC
Please tell me y'all don't charge to come out and look at it
Project Location: Bessemer City, NC
I would like a free insulation estimate on a 2372 sqft home.
Project Location: Bessemer City, NC
My home is hotter upstairs and there doesn't seem to be much circulation. As this is an old house I'm thinking it may need insulation. I am interested in getting a free estimate for insulation on a 2372 sqft home.
Project Location: Bessemer City, NC
Project Location: Bessemer City, NC
Attic envelope, mini split install
Project Location: Bessemer City, NC
I ran into one of the girls that works in you office and asked her if you guys clean dryer vent duct work and she said you do. I live in a 1150 sqft home and our dryer is located in the center of the house with a vent running about 12 ft under the house to the outside. I need it cleaned out and can't reach the vent outside due to location