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Products & Services

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

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

Concord's Leading Heating, Insulation & AC Repair Company

"I can "Feel" the results after my crawl space enclosure."...
Happy Customers Surrounding Concord, NC
Work Requests

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Reviews From Concord
Testimonials From Concord
You have the highest quality people working for you-They reflect you well!
Testimonial by Jim A. from Concord, NC

Fast & Affordable Heating Service Specialists in Concord, 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

Concord'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 Concord, 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 Insulation Experts

Is there moisture in your crawl space? Does your home have proper crawl space insulation? Even if you think your crawl space has enough insulation do not hesitate to contact us. We have a team of crawl space moisture and insulation experts that will give you peace of mind when it comes to your crawl space. It is always better to have too much insulation than to have a space without any insulation at all. Crawl space insulation is very important to the efficiency of your entire home due to the fact that moisture in your crawl space can also lead to rot, structural issues, and health concerns. Don't let moisture in your crawl space plague your home. Contact us today to learn more about our crawl space moisture solutions!

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
Work Requests From Concord, NC
Project Location: Concord, NC
Our bonus room above garage is hot in summer and cold in winter. Overall energy efficiency of home.
Project Location: Concord, NC
Replace heating and a/c system.
Project Location: Concord, NC
My wife and I are ready to have insulation blown in to our attic and would like to see if your services are available and if they fit in our budget. We have a 1700 sq. ft. ranch home in Concord, built in 1973. We purchased the home and moved in 1 year ago. The insulation in the attic is very compacted and in rough shape due to various pests and work that has been done in the attic over the last 45 years. You can clearly see all the joists despite the insulation. Ideally, we would feel better if the old insulation is removed, and all new insulation is installed to the appropriate depth. We would also like an attic door tent, and potentially a second attic access installed in the garage. We have cash in hand and are looking to have this completed sooner than later. Please let me know if you think you can help us. Thank you, Kyle
Project Location: Concord, NC
Would like spray insulate the walls of my. Home it's hot in the summer cold in the winter.
Project Location: Concord, NC
Under house
Project Location: Concord, NC
I'm looking for an estimate for a home energy audit. Thank you.
Project Location: Concord, NC
Need bid on replacing 2 systems. One 5 ton and one 10 ton.
Project Location: Concord, NC
Moving into a townhouse and the previous owners had a dog and rarely cleaned. They were there 6 years.
Project Location: Concord, NC
Heat is not working Additional information: Date requested: 12/10/2017
Project Location: Concord, NC
I would like to get a quote on attic insulation.
Project Location: Concord, NC
Looking to have radiant barrier installed in attic on a 1450 square foot home
Project Location: Concord, NC
Insulation in attic(blown-in type) not upgraded since 1994..need a tax break for this year...
Project Location: Concord, NC
Replace flex duct to one bedroom. Evaluate if something other than flex duct can be run.
Project Location: Concord, NC
Interested in getting estimate for insulation work in detached garage with living space on second floor PLUS need HVAC system for that space checked out.
Project Location: Concord, NC
According to our home builder (Ryan Homes) we need a dehumidifier in our finished basement (2 rooms, about 500 sq') due to moisture just above the floor in a 3-4' section, and an A/C ceiling vent showing moisture and minor staining around it. We are also concerned why it is several degrees warmer upstairs than in the basement or main floor. If your Company does it, we are also interested in semi annual inspections of our heating and cooling systems to make sure they are functioning optimally. Thank you.
Project Location: Concord, NC
I have recently had an insulation installed in my attic from EnergESquad. The same thing fire fighters use to protect themselves. The same lining in pizza home delivery bags. But I can no longer find them. Can you help?
Project Location: Concord, NC
I go through this every summer - the AC can not keep up with the outside heat - especially in the front part of the house (uncomfortable). I want an energy (system) evaluation and see what we can do to make home more comfortable.
Project Location: Concord, NC
We'd like an estimate on attic insulation.
Project Location: Concord, NC
The house has drafts and air seal issues. I was wondering what can be done and how much it would cost. Thanks, Greg
Project Location: Concord, NC
100 year old house.. celluose wall installation and attic HVAC review
Serving the following Concord, NC zip codes
28025, 28026, 28027, 28025, 28026, 28027