We are insured and licensed professionals. We offer a 100% satisfaction guarantee on all of our work. Being in business for over 97 years proves that our customer service is superb and that we are reliable and trustworthy. We are your one stop shop for any comfort issues in your home.
We Help Homeowners Improve The Comfort, Energy Efficiency, & Health Of The Environments In Their Home: Air Conditioning Installation • AC Repairs • HVAC Replacement • Insulation Services • Air Duct Cleaning • Dryer Vent Cleaning • Home Energy Audits • Crawl Space Encapsulations • Crawl Space Repair • Home Generator Installations • Air Quality Solutions • Humidifiers • Dehumidifiers • Duct Replacement • Duct Repair
• FREE HVAC Service Calls with Repair
• FREE Online Quote on New Heating & Cooling Systems
• FREE Insulation Evaluations
• FREE Crawl Space Evaluations
• FREE Home Energy Audits
CURRENT SPECIALS:
• 0% for 18 Months on Select New Heating & Cooling Systems *With financing approval.
• $100 off Home Insulation*
• $30 OFF Furnace Tune Up, & Safety Check (Reg $128)*
• FREE HVAC Service Call with Repair*
• $39 per Vent Duct Cleaning & Disinfectant Spray Treatment Deal*
• FREE Home Energy Audit (normally $249) *Not valid for homes in middle of real estate transactions.
• $250 Off Crawl Space Mold Services*
• $500 Off Home Standby Generators*
• $300 Off Crawl Space Dehumidifier Systems*
*All Specials Expire 12/31/2024 *Not valid with any other offers.
Business highlights
97 years of trusted experience
Family Owned & Operated
Emergency Services Offered
Eco Friendly
Services we offer
Air Conditioning Installation & Repairs • Furnace Installation & Repairs • HVAC Replacement • Insulation Services • Air Duct Cleaning • Dryer Vent Cleaning • FREE Home Energy Audits • Crawl Space Encapsulations • Crawl Space Repair • Home Generator Installations • Air Quality Solutions • Humidifiers • Dehumidifiers • Duct Replacement • Duct Repair
• FREE HVAC Service Calls with Repair
• FREE Online Quotes on Air Duct Cleaning
• FREE Online Quotes on New Heating & Cooling Systems
• FREE Insulation Inspections
• FREE Crawl Space Inspections
• FREE Home Energy Audits
Description of Work: Insulation, mold removal and dehumidifier
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$12,000
Response from GSM Services
Thank you so much [Member Name Removed] for the great review! If you need anything at all we are here for you! Please do not hesitate to reach out!
john S.
08/2020
2.0
insulation, air duct cleaning
+ 0 more
I called and asked about having an estimate done for spray foam insulation. They said they don't offer that because it "isn't energy efficient". I find that extremely hard to believe.
Description of Work: Spray foam insulation
Rating Category
Rating out of 5
Response from GSM Services
Thanks so much for your inquiry. You are correct, spray foam is very energy efficient. There are applications where we question how cost effective it is but there is no question that it is an extremely energy efficient product when applied properly. We apologize for any confusion with our response. We also are just not set up to perform large volume spray foaming projects but we do offer some solutions that might be comparable.
Trudy M.
11/2019
5.0
heating & air conditioning/hvac, basement waterproofing
+ 0 more
GSM did an excellent job on my crawl space. They kept in touch with me so I knew what was being done. The work was done neatly.
Description of Work: Crawl space encapsulation
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$19,500
Sean M.
10/2019
5.0
insulation, energy audit
+ 0 more
Quick response, great price, excellent work and great communication. I will be working with this business again on more of my houses.
Description of Work: blown insulation in an attic
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Steve W.
12/2018
5.0
heating & air conditioning/hvac
+ -1 more
Smoothly. Technician is knowledgable and professional; inspection procedure is thorough.
Description of Work: Routine fall heating system inspection
Rating Category
Rating out of 5
quality
5.0
value
3.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$167
George S.
05/2018
5.0
heating & air conditioning/hvac
+ -1 more
Very well done, prompt and effective.
Description of Work: Compressor fan replaced
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$1,500
Scott L.
05/2018
5.0
heating & air conditioning/hvac
+ -1 more
I hired GSM Services to replace my A/C unit and furnace with a newer, upgraded system. A few weeks ago Kelly came to my house to give me an estimate for a new heating and air system. He was on time and very professional. He surveyed my existing system, took measurements of my house, and did some calculations to determine exactly what type and capacity system that I would need. He showed and explained to me several options as well as their prices. He wasn’t pushy as he left in order to give me time to review the different options before making my decision. I called the office the next day with my decision and to set up a date and time for installation. Today (May 22) Kyle and Craig showed up on time and were extremely professional as well. They worked from 8:30 to 5:30 completing the replacement of my entire heating/air system. The field team leader also showed up just to ensure that everything was going smoothly. They were very helpful in answering any questions that I had throughput the day and they took the time to explain to me about the new system after installation was complete (I.e. how to operate the new programmable thermostat). Overall, it was a great experience and I will definitely use them again.
Description of Work: My A/C and and furnace were 15 years old (original A/C and furnace when house was built) and, because of their age, I was experiencing minor problems with them every year. I decided to replace the entire system with a newer, more energy efficient model.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$10,933
JoAnn T.
05/2018
5.0
heating & air conditioning/hvac
+ -1 more
Excellent work done by Scott. Everything explained. Cleaned debris out of units. Wore booties while in our home. Changed filters and showed me a long list of all the other maintenance he did on the units. Have used this company for over 25 years.
Description of Work: Spring check up
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Lamarr H.
04/2018
5.0
heating & air conditioning/hvac
+ -1 more
This was my spring check up on air conditioner before running.. Everything went very well. Everyone should have a service contract with GSM they are the best. I have tried others but they do not compare to GSM.
Description of Work: air conditioner serviced
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Response from GSM Services
Thank you so much for your review! We are very thankful to have you as a customer!
Dan B.
02/2018
5.0
heating & air conditioning/hvac
+ -1 more
This service was very good. Every employee was professional and thorough.
Description of Work: Replace heating and cooling system
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Charles A.
02/2018
5.0
heating & air conditioning/hvac
+ -1 more
They were professional and very punctual.
Description of Work: We needed a new Gas Heat /AC Unit. I called GMS and they responded promptly. A Service Technician came out to review the problem with the old furnace. After his assessment we decided we wanted to look at a new furnace. A Comfort & Energy Advisor was called and we were able to purchase a new furnace the same day.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Andrew R.
06/2017
4.0
heating & air conditioning/hvac
+ -1 more
We have a contract with them. They are very quick to respond. They are always there. They did what they said they were going to do, and what I felt was needed. They addressed my issues pretty well. Anytime I've had any issues with my questioning, one technician's capacities against the company, they addressed it pretty well, and they sent me somebody else. There are discrepancies between the technicians.
Description of Work: Checked the heating and air conditioning.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
4.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Rick E.
06/2017
5.0
heating & air conditioning/hvac
+ -1 more
They come out and service twice a year.
Description of Work: We buy our heating and air conditioning from them.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Patrick R.
05/2017
5.0
heating & air conditioning/hvac
+ -1 more
I'm pretty picky and GSM exceeded my expectations on every level. They truly care about their customers. Five stars.
Description of Work: New AC condensers, furnace, and ductwork
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
BELLE H.
04/2017
5.0
heating & air conditioning/hvac
+ -1 more
We had some questions about some problems under the house. A man came out and explained to me what they could offer to try to solve those problems. They call it the doctor energy specialist or something, I don?t know. It?s about removing moisture and other things from under the house and making sure the ducts are properly attached and that they are insulated properly. That the house insulation is proper and they sealed most of the vents to keep the wet air from coming in. They put in a dehumidifier and all that stuff. They did a large amount of work. They put in a new moisture barrier and corrected some problems that we already paid somebody to do and they didn?t do. They even attached the dryer duct, which wasn?t attached and the air was going out all under the house. They were very very good. They did what they said. They took all the trash and everything they found out from under there. This whole experience has been a nightmare. Those people at GSM were super. The inspection he did not charge us for, but we put an amount down on the work they were going to start doing. It was excellent because he went under the house, he took pictures of all the things he was going to tell me about, and then he explained the different treatments that were available and the prices for those treatments. And what particular things they would correct. It was very clear and he was very good about answering my questions. He seemed very experienced.
Description of Work: They did an inspection under the house.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
BELLE H.
04/2017
5.0
heating & air conditioning/hvac, insulation
+ 0 more
I've just been really pleased. The only thing that I kind of have a question about. They said the supervisor would come back out and show me pictures of what they had done under there after they got finished. He had some kind of a conflict and he didn’t come. I have to call and ask them to have him come. But I have the number of the man who talked to us at the begging and he is the one who told me always get pictures when somebody finishes, not just when they start. I think he will come or send whoever is supposed to come. I am not worried about that.
Description of Work: They replaced insulation that was under the floor and had fallen down or was damaged. They corrected a couple of problems that they found with the furnace ducts. There was a place where it wasn’t even connected, the ends were not connected and the air was blowing out over the house. Another company put some what he called flex something in a couple of places but they did not connect it properly so GSM had to correct that. The person that we paid to insulate the furnace ducts did not insulate all of them, and did not insulate the boots, which are the parts that go up to the floor to the registers and stuff. GSM did the insulation for that and corrected the dryer vent problem. They took all the trash that other workers had left; big pieces of ducts, insulation, cement blocks and all kinds of other trash that was under there they cleared all of that out. They even cleared out the racoon droppings that the pest control company left. They sealed up the vents except for two, one at each of the house that they left partially opened. They took away the old moisture barrier plastic, and put down new thicker barrier plastic on the crawl space. They sealed up any holes that were in the foundation or around the vents or anything from getting in; like raccoons. They put a dehumidifier under there and ran a drain pipe system on it to drain outside.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$8,559
BELLE H.
04/2017
5.0
heating & air conditioning/hvac
+ -1 more
I guess the price alright. It's about what we paid in Charlotte with another company, maybe just a tiny bit less. But I guess it's the what the prevailing rate is. We had somebody else to do the work, and they didn't do; and we paid them more. We have signed up to use them for our maintenance service for the furnace and air conditioner.
Description of Work: We called GSM as a recommendation by our son and they came out and did our maintenance service for the spring for the air conditioner. They had to replace some parts.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$571
Robert C.
04/2017
5.0
heating & air conditioning/hvac, insulation
+ 0 more
They did a fantastic job. The price was reasonable. They called 20 minutes before they arrived to let me know they were on their way. Every time they would come into the house they would but on booties. They carried out all the old equipment and they said they recycle it, that was a plus. They explained everything to us. Two days after we were trying to figure out the thermostat and I think we messed it up. We called them and explained we couldn't get it set to 76 degrees and he said he would be out, again he called us ahead of time and told us he was on his way. When he got here he ran us through it, he was so nice. Every six months they come here and check everything, crawls under the house and checks the heater and the connections. If you have questions they answer you, their very courteous. They don't treat you like a fool, they teach you what you should know. They are efficient and pleasant.
Description of Work: They put in a new heat pump, new propane heater underneath the house. They put plastic underneath the house and up the brick walls. They insulated everything.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Chris C.
09/2016
5.0
heating & air conditioning/hvac, insulation
+ 0 more
I called GSM inquiring about their HVAC and insulation services. I also asked if I could have someone perform a Manual J load calculation (surprise to me, the Manual J calc was free!) as I felt that my existing heat pump was sized too small for my home (2.5 ton dual-zone single stage heat pump for 2200sq ft 2-story house). We agreed on an appointment time, and they sent Kelly out to my house. Kelly was very nice and professional, and did a thorough job explaining what all could be done and what my options were. Due to having so little room to work inside of the mechanical closest, you would have to remove the air handler completely just to wrap all of the duct work. Since I would be removing the old air handler that was 8 years old anyway, I decided to replace the entire system with a new Amana 3-ton 18 SEER dual-zoned heat pump. Kelly also told me they could seal up the hole & the mechanical closet so that hot air could no longer enter that space as well. I agreed to their quote, and they came out a week later (it would've been sooner but GSM wanted to make sure that the new system was designed properly, so they had to architect and design the layout of the new equipment to fit the small space) to do the work. Owen and Jason came out to perform the installation. They were both very professional & thorough, and they did an excellent job with the swap out & installation of the new heat pump. When GSM told me that it would take two days to do the work, I was prepared to be miserably hot trying to sleep at night with no air conditioning. Not only did GSM bring a portable AC unit for me use that evening so that wouldn't be the case, Owen and Jason actually got the heat pump wired and working the first day so I had full AC that evening, and the portable unit wasn't needed! They also insulated the attic space & mechanical closet with spray foam and foam board so the hot attic air will no longer be an issue. All in all, my experience with GSM has been great! They've been easy to communicate with throughout the entire process, they did an excellent job with the installation of the new equipment, and now I can rest easy knowing that everything has been taken care of!
Description of Work: Due to the shoddy design of my existing dual-zoned heat pump system, an uninsulated/unsealed hole in my mechanical closet that led to some attic space, and because the original HVAC contractors (not GSM) that installed my existing heat pump chose to not only not wrap any of the bare sheet metal supply plenums with insulated duct wrap, they also didn't use internally insulated supply plenums. Meaning, all of my hard sheet metal supply plenums were completely uninsulated - both inside and out. The uninsulated/unsealed hole that was found allowed hot air from the attic space to come into the mechanical closet. This caused a huge moisture problem and all of the bare sheet metal duct to excessively condensate.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$8,700
NONAME R.
08/2016
5.0
heating & air conditioning/hvac
+ -1 more
They came out because our unit was not blowing cold air. The tech found a leak in the system and scheduled a time to replace the part. He refilled our refrigerant that day which was included in the price of the part. My family has used this company for years with no complaints.
Description of Work: Replaced the evaporator
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$1,886
Angela B.
11/2015
5.0
heating & air conditioning/hvac
+ -1 more
It was a very positive experience. The sales rep that came out was very helpful and easy to work with. We've also always had a very good experience with their techs.
Description of Work: They installed a new AC unit on our first floor.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$5,000
Ginny P.
07/2015
5.0
heating & air conditioning/hvac
+ -1 more
GSM has been in business for a very long time. I know why. GSM was professional from the original contact, to the quote, to the install, the testing, and the follow up. The advisor answered my questions, and was available later for follow up questions. They gave me a range of quotes which I really appreciated and helped me make a fair comparison to other quotes I received. This company guarantees your satisfaction and comfort, and they give that to you in writing. They were willing to work with me on scheduling the installation, and kindly provided a portable unit to keep me cool overnight. The weather was in the high 90s and this was a two day job. The technicians who actually did the work were courteous and respectful of my home. I felt completely comfortable with them coming in and out as needed. Once the installation was done, they gave me good clear instructions on using the system; I feel comfortable with the programmable thermostat. They cleaned up after themselves well too. They have provided detailed information on how I can reach them with any questions or concerns. These guys understand customer service. I anticipate a long business relationship with them.
Description of Work: Installed new HVAC gas pack system and replaced all ducts
Rating Category
Rating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$9,300
Melvin E.
07/2015
5.0
heating & air conditioning/hvac
+ -1 more
Very pleased with with staff and their work.
Description of Work: Check our AC a few times a year.
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
Cheryl G.
02/2015
5.0
heating & air conditioning/hvac
+ -1 more
Excellent service and workmanship
Description of Work: Replaced a roof
Rating Category
Rating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Yes, I recommend this pro
$56,000
Scott S.
02/2015
5.0
heating & air conditioning/hvac
+ -1 more
They are very responsive and reasonably priced.
Description of Work: Monthly fee for annual maintenance contract.
All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.
*Contact business to see additional licenses.
Service Categories
Heating and Air Conditioning,
Insulation,
Energy Efficiency Auditing,
Metal Fabrication & Restoration,
Dryer Vent Cleaning,
Air Duct Cleaning,
Basement Waterproofing,
Roofing
FAQ
GSM Services is currently rated 4.8 overall out of 5.
Sunday: 8:00 AM - 8:00 PM
Monday: 8:00 AM - 8:00 PM
Tuesday: 8:00 AM - 8:00 PM
Wednesday: 8:00 AM - 8:00 PM
Thursday: 8:00 AM - 8:00 PM
Friday: 8:00 AM - 8:00 PM
Saturday: 8:00 AM - 8:00 PM
GSM Services accepts the following forms of payment: Check,CreditCard,Financing Available,PayPal,Venmo,Zelle
No, GSM Services does not offer a senior discount.
Yes, GSM Services offers emergency services.
Yes, GSM Services offers warranties.
GSM Services offers the following services: Air Conditioning Installation & Repairs • Furnace Installation & Repairs • HVAC Replacement • Insulation Services • Air Duct Cleaning • Dryer Vent Cleaning • FREE Home Energy Audits • Crawl Space Encapsulations • Crawl Space Repair • Home Generator Installations • Air Quality Solutions • Humidifiers • Dehumidifiers • Duct Replacement • Duct Repair
• FREE HVAC Service Calls with Repair
• FREE Online Quotes on Air Duct Cleaning
• FREE Online Quotes on New Heating & Cooling Systems
• FREE Insulation Inspections
• FREE Crawl Space Inspections
• FREE Home Energy Audits