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heating and cooling systems
high efficiency furnace
home heating systems
hvac companies
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Crawl Space Insulation

Home Energy Saving & Audit
energy efficiency audit
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Home Insulation
attic insulation
blown in insulation
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Water Heaters
gas water heaters
high efficiency water heater
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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
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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

Heating, Air Conditioning & HVAC Repair & Insulation Company Serving Denver, NC

Happy Customers Surrounding Denver, NC
Work Requests

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Denver's Furnace Repair Experts

There are many reasons why your home’s heating system or furnace may not be working like it should (or working at all). Regular maintenance is important to prevent problems with your heating system and to keep your home comfortable and your energy costs low. Here at GSM Services, we can evaluate your current heating system and provide a fast quote to get your furnace running like new. We provide repair and maintenance services for oil, electric, gas, and propane furnaces.

Furnace Installation & Replacement

Is it time for a new furnace? Furnace replacement will be necessary if a major problem develops – such as a cracked heat exchanger. GSM Services is your local expert for heating system replacement. Before we replace your existing furnace, we will thoroughly inspect your heating system. If you require a new furnace, we can install a heating system that's right for you.

We install a variety of types of furnaces:

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

Schedule a FREE Estimate!

Insulating Your Denver Home

We specialize in a variety of home energy improvement services that were 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

Heating & Air Conditioning Repair, Installation & Maintenance Service Contractor 

As Denver's trusted air conditioning and heating systems repair contractor, you can rest assured that we will get the job done right the first time! Since 1927, we have repairing homeowner's heating and air conditioning systems 

If you feel that your home's HVAC system is not working as it should, we can fix that. We offer maintenance, repair, and installation services of all kinds of heaters. Did you know that having an efficient heating unit will not only help keep your home warmer in the winter months, but can greatly improve the air quality of your home?  

Along with heating repair, we also offer a wide variety of air conditioning system services. Having heat is a necessity for home owners in the Greater Charlotte area, especially in the winter.  Our team of HVAC repair & service professionals can replace any heating system from furnaces to electric heaters, so no matter what sort of heating your home uses, we can make your you're never left out in the cold.

  • Gas Furnace
  • Oil Burners
  • Geothermal
  • Electric Furnaces
  • Heat Pumps
  • Wood Heating
  • Forced Air Heaters
  • Hot Water Heater
  • Tankless Water Heaters 
  • Central Air Conditioning
  • Ductless Air Conditioning
  • Evaporative Air Conditioning
  • AC Repair & Installation
  • Dehumidification
  • Heat Pumps
  • Ductwork Cleaning
  • Ductwork Sealing 
  • Ductwork Repair
  • Air Purification

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

Schedule a FREE Estimate!

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!

News & Events From from Denver
This is the question that most homeowners don't want to think about.  No one wants to think about their...
This is the question that most homeowners don't want to think about. No one wants to think about their air conditioning going out during the middle of summer or their heat going out on below freezing days. Read below on ways we can help you out in the long run.... [Read more]
Work Requests From Denver, NC
Hagers Ferry Road in Denver
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?
Malibu Pointe Lane in Denver
Attic insulation and Shed insulation
Durango Way in Denver
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!
DRURY LN in Denver
Interested in a quote to replace 16 year old Trane AC unit that has stopped working and will not cool house.
Executive Circle in Denver
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!
E. Berkeley Rd. in Denver
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.
in Denver
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.
Dellingdowns Dr in Denver
We need a new HVAC system and would like a quote
Governors Island Drive in Denver
Need quote to have French drain added inside crawlspace and have crawlspace and sealed
Cottonwood Dr in Denver
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.
Executive Circle in Denver
Interested in a quote to have the unerside of my roof deck sprayed with foam 1974 double wide with a 2/12 pitch
Nautical Court in Denver
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
Pine Lake Road in Denver
Would like to schedule the $98 precision cooling tune up
Osprey Run Court in Denver
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
Eagle Pointe Court in Denver
We would like to add blown in insulation in our attic. I would like to schedule an estimate for next week 8/8 or 8/9. Thank you! Additional information: Date requested: 08/08/2016
Secluded Line in Denver
Install roof over old shingle roof
Sweet Clover Way in Denver
Installation of geo thermal heating and cooling
Little Egypt in Denver
I have a steel roof with no plywood between the steel and rafters. HVAC in attic. Gets vey hot in summer and cold in winter. Very hard to maintain constant temp in house.
Sea Gull Way in Denver
I am requesting an estimate to encapsulate my crawl space.
Golf Course Dr S in Denver
Foil Barrier for my attic.