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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

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

Before and After Pictures from Dallas
Heating - Before and After - Tune Up

Heating - Before and After - Tune Up

Before After
Heating - Before and After - Tune Up Heating - Before and After - Tune Up

Our residential service technicians do routine system check ups and service for our customers to help their heating and cooling systems run smoothly when you need them the most.

For customers, peace and mind are the two most things that they want when it comes to their home comfort. Customers don't typically see the work that is performed on their systems - Most furnaces are either in the attic or crawlspace of a home (out of site out of mind). 

Our technicians leave the systems cleaner than they find them.  Sometimes dirt, dust and other things in the air can dirty a system. We make sure to leave your heating and cooling system the cleanest possible. 


See photos for a before and after of a furnace in a crawlspace on a recent tune up.

Furnace Cleaning/Tune Up

Furnace Cleaning/Tune Up

Before After
Furnace Cleaning/Tune Up Furnace Cleaning/Tune Up

Furnace tuneups are not only good for safety purposes but it also helps the efficiency of your heating system.

Company Awards

Heating, Air Conditioning & HVAC Repair & Insulation Experts Serving Dallas

Thanks for giving me some extra special care while my system was being fixed....
Happy Customers Surrounding Dallas, NC
Work Requests

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Reviews From Dallas
Testimonials From Dallas
We wouldn't ever consider anyone else to do our Heating and Cooling needs.
Testimonial by Jim & Linda L. from Dallas, NC
Scott was great, every tech that you have sent out has been great!
Testimonial by B M. from Dallas, NC

Dallas'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 Dallas 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 Dallas, 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 Dallas'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 Dallas
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]
Do you need a wifi thermostat in your home? How much does a wifi thermostat cost? What makes a wifi thermostat smart? How much money can you save with a wifi thermostat?... [Read more]
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]
Work Requests From Dallas, NC
Saint John St in Dallas
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!
Eastway Dr in Dallas
Like to know that cost of duct cleaning
Kudzu Lane in Dallas
Follow up Inquiry for crawlspace rennovation. Checking in again about pricing options. We've spoken previously about these matters.
Village Center Dr in Dallas
HVAC maintenance needed. It appears that the AC is not cooling properly.
Eastway Dr in Dallas
Need twice a year ac/heat tune ups
Gastonia-Dallas Hwy in Dallas
Woodyville Rd in Dallas
I have a Fujitsu ductless mini split system. It has 3 heads. One of them we think is leaking so we turned it off. The other we think is frozen up. Blows warm air. One of them works. Is this something yall could diagnose/fix? Also email works best. Thanks
S Rhyne Street in Dallas
Need the ductwork cleaned in a rental property I have purchased.
Lauren Alexis Ct in Dallas
I have spoke with Steven Long regarding a crawl space issue in my home..I have had work done by your company, and would like to speak to Steven along personally about some issues that I am not happy with..Please have him call me ASAP with the cell number that I listed.. Best Regards, Mike Burriss
W Robinson St in Dallas
Our heating system is outdated and we use window units to cool the house. Looking to get unit installed.
E. Webb St in Dallas
Tune up
Meadow Creek in Dallas
AC is not cooling. Ice formed around pipe.
Heather Ridge Rd in Dallas
2 - GSC units needing R22 charge, one capacity is 117 and another capacity is 93.
Willis Rd in Dallas
Heat/AC repair
Summey Barker Dr in Dallas
Just purchased the house. I am remodeling before we move in, so I want to vapor lock the crawl space. The house is 1350 square feet. Do you guys sale the material to do this, or do can you perform this job? The water heater is located in the house. The gas furnace is the only thing, other than pipes, located in the crawl space. The crawl space is flat and about 3-4' tall.
S. York in Dallas
Need a quote for HVAC Repair or HVAC installation for a commercial building that is about 1,500 sq/ft.
Blue Moss Dr in Dallas
Interested in maintenance tune up to my AC unit
Canada Dr in Dallas
I'd like an estimate on having the spray foam insulation put in my shop.
Gastonia Dallas Highway in Dallas
The project will be at Rankin Lake Baptist Church. The original air conditioning unit to the building has gone out. The old unit needs to be taken out and a new unit installed. There is an additional unit that is smaller that needs to be changed out as well.
Broad Leaf Court in Dallas
My ac unit needs to be serviced