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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

HVAC Systems
air conditioning contractors
air conditioning systems
boiler heating 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 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.

Company Awards [Read more]
Outstanding Employer Award winner for the 2016 Governor's NCWorks Awards of Distinction... [Read more]
GSM Services was recognized as a community leader in partnership with The United Way of Gaston County The United Way of... [Read more]
More Awards

The Preferred Air Conditioning, Heating, and Home Insulation Company of Dallas, NC

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

Insulating Your Dallas Home

You can have a comfortable home while lowering your energy bills at the same time. Our professional crew knows the right insulation to install in the different areas of your home.

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 & HVAC Services

Old, failing Heaters and Air Conditioners are a serious issue in your home. We are your local experts for both repairing your current system or installing a new, energy-efficient unit.

  • Gas Furnace
  • Oil Burners
  • Geothermal
  • Electric Furnaces
  • Heat Pumps
  • Wood Heating
  • Forced Air Heaters
  • Gas Boilers
  • Oil Boilers
  • 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

Home Energy Audits

Our professionals provide comprehensive home energy audits  identifying the areas of your Dallas home that need improvement, showing you exactly what was found and giving you a prioritized list of list of home energy tasks.

Evaluations Include:
  • Air Leak Inspection 
  • Thermal Scanning
  • Detailed Explanation    

  • Blower Door (Infiltrometer) Test
  • Insulation Level Check
  • Appliance & Lighting Checks

Get A FREE Quote Today!

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 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
Angelina Drive in Dallas
My unit outside was hit with a rock and it leaked all the ferron out the unit is about 16 years old but it worked just fine
Blue Moss Dr in Dallas
Wanted to get an estimate on how much it would cost to replace a Honeywell truzone zone control panel.
Ben Rich Street in Dallas
Looking for a a/c repair estimate. Unit is not cooling diagnostic fee was given. Caller was referred to office. Appt was set.
Hunters Pointe Drive in Dallas
I need to replace a two ton goodman unit installed in 1997. I need the heat pump and the air handler replaced with a new unit.
Mayberry Road in Dallas
New client, referred by internet, needs an HVAC unit installed. Appointment set.

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