We are a third generation business that originally started out as a small sheet metal shop and metal roofing company. W. Fred Long opened the business in 1927 and later passed it to his son Ronald J. Long, Sr. in 1971, who passed it to his sons Steven and Joel in 2005.As the company expanded over the years, we took to duct fabrication, commercial roofing, and commercial and residential HVAC. Because HVAC is the largest percentage of energy used in homes, we thought it was a natural progression to add an energy related division to the business.
We are very excited to have the opportunity to expand and are even in the process of opening a customer care center where all of our sales, marketing, accounting, and training operations will be located.
Dr. Energy Saver Charlotte offers homeowners energy efficient products and services. We can provide you with efficient lighting, replacement windows and doors, water heaters, insulation, air sealing, help with water conservation, sources for renewable energy, and much more to help you save money.
We have helped many homeowners pay less for energy bills by making their homes more energy efficient. Our comprehensive home energy efficiency solutions are customized to fit your specific needs.
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Services
Air Conditioning
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Here at GSM Services, our skilled technicians can diagnose 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.
Heating
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From heating system repairs, including furnaces and boilers, to replacing your inefficient heating system, contact GSM Services for prompt and professional service. To keep your furnace or boiler running efficiently and prevent expensive repair costs, regular service and maintenance is necessary. We offer comprehensive tune-ups for all heating system makes and models.
Videos
HVAC Motor Starter replacement (step 1 of 5)
GSM Services doing a replacement on an air conditioning unit motor starter. (step 1 of 5)
Oil Furnace Replaced With High Efficiency Heat Pump, Gas Furnace and Air Conditioning System
http://www.drenergysaver.com | 1-888-225-6260
A 70-year-old house with an old inefficient oil furnace, receives a full heating and cooling system upgrade. Dr. Energy Saver replaced the old furnace and High Efficiency Heat Pump with a backup High Efficiency Propane Gas Furnace and High Efficiency Air Conditioning System. High efficiency HVAC systems, by definition, are systems that give you the best results in terms of heating and cooling, per each dollar spent to run the unit. A heat pump works by bringing heat from the outside to the inside. It will produce $3 worth of heat per each dollar spent in electricity. When the temperature outside is below 35 degrees, the backup propane gas furnace kicks in, operating at 96% efficiency. High efficiency air conditioning/heat pump systems have a much bigger condenser and a higher SEER - Seasonal Energy Efficiency Rating- which is an efficiency measure for HVAC units.
If you are a HVAC or Home Improvement Contractor, check out our exciting franchise opportunity.
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Reviews (31)
Melafaire
May 23, 2022
The gentlemen who came to my house, came to install a dehumidifier in our crawl space. They were considerate, calling when they were going to be a few minutes late, and were very professional. They got the job done quickly and then explained what was done and how the little sensor that goes with the dehumidifier works. GSM is a good company that we have worked with for years and plan to work with for many more.
Donna V.
May 19, 2022
Bad customer service. I called to get help with my air conditioner. I asked if they serviced my area Amanda said yes. When I told her I have an old unit her voice changed and she hesitated then she said a tech would call me back shortly. No one called all night. The next morning Amanda called and said sorry we don't service your area. I found out from a friend that they do service my area they just didn't want to work on an older unit.
Very bad customer service. Also if that was true the technician should have called back that night and informed me. I waited on a call all night. I could have had a head start and called someone else. They didn't care.
Very bad customer service. Also if that was true the technician should have called back that night and informed me. I waited on a call all night. I could have had a head start and called someone else. They didn't care.
Ashley Woody
Apr 04, 2022
Since the moment we called GSM for what we hoped would be a repair that turned into an HVAC replacement. Everyone at GSM has been friendly and caring, very knowledgeable and helpful. I am so glad we went with GSM. Very pleased with the installation. They answered all our questions, gave suggestions and really made this process easy. Would highly recommend.
Charlene Krug
Feb 18, 2022
Our technician. Zach was friendly, professional and you can tell he really cares. Recommendations were made in a practical and reasonable manner so as to not over inflate or exaggerate. Honest opinions given that are logical and reasoned as to what can wait - and what can't wait. GSM installed our system 11 years ago and has done all maintenance. System is holding up incredibly well and we are quite pleased. Highly recommend!
Laurie McDonald
Feb 14, 2022
Andrew and Amanda were our technicians today. They are both courteous, professional, and knowledgeable. It was a heating checkup for us, and they were very efficient. Plus, I love that Amanda scheduled us for our cooling checkup right away. one less thing for me to remember to do! Great job, GSM should be proud to have these two on their team!
Summer Stuart
Feb 04, 2022
Austin was wonderful. We just moved into our home and our heating system was making a loud noise. Knowing it was a new unit we called who installed it. Austin with GSM came out and checked everything throughly. Then explained the system and controls to us. He was very knowledgeable, professional and friendly. I will highly recommend them to all my friends and family. Summer Stuart
Lou Ann Westmoreland
Feb 02, 2022
Scott and Peyton were actually early which was a good thing. They were respectful of my home, putting on shoe covers before entering. Scott explained everything that they were doing, including that Peyton was a new trainee. I was impressed with his demeanor and his work. Both worked on the heating unit and then did the generator service. Very accomplished service by excellent employees!
Bd D.
Jan 11, 2022
The GSM Service providers did an excellent job! I would highly recommend their work. My wife and I wanted our microwave to exhaust to the outside. Stephen, Ivan and Craig were very courteous, professional, available to answer any questions we had and were able to flexibly work around our morning schedule. Their work was very clean, organized and thorough.
I have no regrets and would call GSM again because of the work ethic of these men. Tim also, who wrote up the original job order, was very professional and knowledgeable, giving on point advice that made this process very smooth and painless.
I have no regrets and would call GSM again because of the work ethic of these men. Tim also, who wrote up the original job order, was very professional and knowledgeable, giving on point advice that made this process very smooth and painless.
Kristin Northcutt
Jan 10, 2022
We couldn't be happier with the great service GSM provides to our family. Scott came this morning to service our generator and Brad came later in the day to do our furnace tune up. Both were very professional, yet extremely friendly and "down to earth." Thumbs up to both of these guys and to GSM! Service: HVAC system maintenance
Jessica Price
Jan 05, 2022
We have had to replace our entire heating and vent system in our house during a very cold period. The team lead by Martin have done an amazing job. They are very professional, respectful, and extremely hard working. I am thankful that this crew did the job at my house and would definitely recommend them to anyone that needs this type of work done. These guys deserve an award for amazing customer service and outstanding work.
Super G.
Dec 22, 2021
I DO NOT recommend using this company. There is ZERO follow through. Salesman came by to look over heating unit. He was supposed to have an estimate for a replacement to me by the next day. It has been five days later and still no estimate. Salesman pushes me off telling me he will have it to me later in the day and obviously doesn't want or need my business. I guess Jim isn't aware GSM heating isn't the only gig in town.
Brett Hamburger
Dec 15, 2021
From start to finish, this company was professional, prompt and extremely knowledgeable. Our whole home generator was installed in just a few hours. They took care of our landscaping as if it were their own, even going so far to relocate one of our azaleas to ensure the exhaust wouldn't dry out the bush. Service: Installation
Allan M.
Sep 04, 2021
I needed our attic insulation completely removed and replaced, and I called GSM Services because of their consistently high ratings. From the initial call, to their visit and estimate, I can see why their ratings are so high! Total professionalism, but it felt like I was talking to a personal friend. As others have stated, they were not in a hurry, answered all my questions, and even changed my appointment time when I had an unexpected conflict to better help me.
Once Tim was here, I asked him if he could take a look at another issue I was having in my crawl space. He immediately said "of course" and spent another hour surveying and evaluating that issue. When he was finished, he provided me with multiple solutions to BOTH issues, giving me options from low-cost to more involved/expensive ones, to decide on.
We have decided on the option to take and have scheduled the work in October.even that was done with our convenience in mind! I plan to update this review after the work is completed, but if it's even close to the initial customer service, I will be very pleased!
Once Tim was here, I asked him if he could take a look at another issue I was having in my crawl space. He immediately said "of course" and spent another hour surveying and evaluating that issue. When he was finished, he provided me with multiple solutions to BOTH issues, giving me options from low-cost to more involved/expensive ones, to decide on.
We have decided on the option to take and have scheduled the work in October.even that was done with our convenience in mind! I plan to update this review after the work is completed, but if it's even close to the initial customer service, I will be very pleased!
Catherine B.
Feb 05, 2021
I was having problems with high humidity in my crawl space. GSM installed a dehumidifier which solved the problem completely for a fraction of the price others were quoting me for a complete redo of my vapor barrier and installing a complicated ATMOX system. The installers were all great to work with and they even came back for a quality check a few months later to see how things were working free of charge. I will definitely use GSM again!
Jason McDaniel
Feb 03, 2019
I had my crawlspace encapsulated last week by GSM Services. The whole process from being scheduled to completion was smooth. Stoney Davidson and his whole crew deserve praise. They worked hard cleaning out my crawlspace and preparing it for the encapsulation. This is my 2nd house I have had encapsulated by GSM and I would highly recommend their services. I have also had a new HVAC system installed last year. Everyone from the office staff to the techs who perform the job are top notch!
Gary L.
Nov 29, 2018
New arrival in Gastonia and the first deep cold snap I had no heat; just the fan blowing. Aux heat did not function and the compressor disconnects below a certain temperature. Called GSM after checking their many 5 star reviews. They did not disappoint. 10 minutes into the visit their tech found the problem: a loose connection in the thermostat. No expensive parts needed, just 10 second tightening of a tiny screw!
The tech and his assistant were excellent. Fast, friendly and professional. Gsm will always be my first call when I have a HVAC problem! No wonder they've been in business so long.
The tech and his assistant were excellent. Fast, friendly and professional. Gsm will always be my first call when I have a HVAC problem! No wonder they've been in business so long.
Gary L.
Nov 28, 2018
New arrival in Gastonia and the first deep cold snap I had no heat; just the fan blowing. Aux heat did not function and the compressor disconnects below a certain temperature.
Called GSM after checking their many 5 star reviews. They did not disappoint.
10 minutes into the visit their tech found the problem: a loose connection in the thermostat.
No expensive parts needed, just 10 second tightening of a tiny screw! The tech and his assistant were excellent. Fast, friendly and professional.
Gsm will always be my first call when I have a HVAC problem! No wonder they've been in business so long.
Called GSM after checking their many 5 star reviews. They did not disappoint.
10 minutes into the visit their tech found the problem: a loose connection in the thermostat.
No expensive parts needed, just 10 second tightening of a tiny screw! The tech and his assistant were excellent. Fast, friendly and professional.
Gsm will always be my first call when I have a HVAC problem! No wonder they've been in business so long.
Mike M.
Jun 20, 2018
True story. Our upstairs unit had stopped cooling, so we called GSM to come out & take a look. They inspected & told us the compressor had gone bad.minimum of $2k & that we should really just put a new unit in.average $7.5K because there were "probably" other issues with it. We decided to get a second opinion & called Morris Jenkins. There technician came out & inspected it for 10 minutes.
He let us know that the compressor was fine & that a $500 switch just needed to be replaced. The Morris Jenkins tech wasn't sure if the GSM had even looked at the compressor. GSM decided they would rather screw me than provide good service & get a loyal customer. Thanks to Morris Jenkins!
He let us know that the compressor was fine & that a $500 switch just needed to be replaced. The Morris Jenkins tech wasn't sure if the GSM had even looked at the compressor. GSM decided they would rather screw me than provide good service & get a loyal customer. Thanks to Morris Jenkins!
Sheri C.
Apr 16, 2018
WOW! They were awesome. From the sales rep. Jim Smith; up front, explained everything carefully, listened to what we needed and formed the best possible plan for us. Took his time, answered any and all questions. Stated exactly what they would do, and a shocker in this day and age, ACTUALLY DID IT! Shawn, the project manager, listened carefully, made notes, brought in the installation team foreman, Steve. Wow again, personable, professional. Worked steadily, but always had time, if i had a concern or question. Did a great job; cleaned up after themselves. Made sure they did everything promised, and did it in a professional manner. Everything done to the letter, neat and tidy. Great group of people! So very pleased with the company and all the people that did our job.
Vincent S.
Dec 07, 2016
After a few years of terrible service from Charlotte Comfort Systems I switched to GSM. What a difference. The techs are so much more knowledgeable and professional. The company stands behind its work and their prices are good. I wish I had them from day one, I would have avoided the other nightmare.
Jeff L.
Aug 10, 2016
We used GSM for insulation, heat and AC replacement. The experience was excellent. Beginning with the low pressure sales meeting with Wayne to the installation with Sean and the the 2 teams of hard working professionals. Our install occurred during August 2016 when we were having temps in the high 90s. The guys had a rough job and we are very happy with the results. Jeff
Harry D.
Jul 20, 2016
Carol B.
Jun 22, 2016
I have been using this company for 25 years. They always exceed my expectations with their work. They are on time for the appointment, very professional and knowledgable. They aren't in a hurry and answer all my questions. They put in my air conditioner and furnace and do the maintenance on it They are clear about the parts and costs I also have a 30 year old system upstairs and they have been able to keep it going. Yey! They had to build some ductwork a few years ago and did a great job! Very reputable business
J. Stephen S.
Mar 04, 2016
We recently had a new HVAC system installed by GSM. Also, a wonderful steam humidifier. The price was exactly what they quoted and the performance of the system is even better than we expected. We had one minor issue after the installation and they addressed it immediately. I admire the fact that GSM employees are obviously proud of the company's reputation and consistently go above and beyond to maintain the trust of their customers.
We always appreciate their commitment to excellence which is certainly reflected in their products, services and, most importantly, in their employees. We've been GSM customers for over 20 years. During that time we've learned, there may be cheaper options out there, but there is no better value.
We always appreciate their commitment to excellence which is certainly reflected in their products, services and, most importantly, in their employees. We've been GSM customers for over 20 years. During that time we've learned, there may be cheaper options out there, but there is no better value.
Kevin K.
Apr 13, 2015
GSM exceeded my expectations on a recent repair. They were able to come out the next day to diagnosis the system and discuss my repair options. Unfortunately, the blower motor had failed and required replacement. They worked with the manufacturer to determine the part's warranty eligibility. They quoted me a price to replace the motor and even honored that price after the manufacturer came back and clarified that the motor warranty had just expired.
The technician was knowledgeable and friendly. He gladly explained the problem and showed me the failed part. I really appreciate the technician wearing boot covers when entering my home and laying down a rag to protect the floor. GSM is now my first choice for heating and air. Thanks to Mark & Mike!
The technician was knowledgeable and friendly. He gladly explained the problem and showed me the failed part. I really appreciate the technician wearing boot covers when entering my home and laying down a rag to protect the floor. GSM is now my first choice for heating and air. Thanks to Mark & Mike!
Arielle Wellons
I've been impressed with the professionalism of GSM advisors and technicians. Jim has gone above and beyond to make sure we're happy with the results and the systems are working properly. It's obvious that customer satisfaction is a real priority for GSM.
GSM replaced our broken AC unit and corrected problems with a furnace installation (which had been done by a different company through a home warranty).
They also insulated and sealed our attic. We're signed up for regular seasonal tune-ups on the furnaces and AC units through GSM. The only issue I encountered was that sometimes phone calls weren't returned promptly, so at times I had to call more than once to follow up on things. However, I'd still give 5 stars, because this was only a minor concern.
GSM replaced our broken AC unit and corrected problems with a furnace installation (which had been done by a different company through a home warranty).
They also insulated and sealed our attic. We're signed up for regular seasonal tune-ups on the furnaces and AC units through GSM. The only issue I encountered was that sometimes phone calls weren't returned promptly, so at times I had to call more than once to follow up on things. However, I'd still give 5 stars, because this was only a minor concern.
Jerry Hyatt
Cathy B Pilgere
My heat went out today on the coldest day of the year. I called GSM and they were right out here. Robert Shook and his helper were awesome. Then had Jim Smith come out because we ended up needing a new ac unit and a new furnace. He went above and beyond to help us with financing. The process was painless and we are getting our new system on this Tuesday. Also got our heat back going for now and also gave us heaters until our new one goes in. Very friendly and professional service today. Definitely will recommend them.
Diana Cornelison
It was a great experience with GSM from start to finish! Kelly did a great job in explaining our options and making suggestions without pressuring us. Kyle H. and his partner (I'm sorry I don't remember his name!) did a fantastic job with the installation. They were friendly, professional and had our new system installed faster than I could have imagined! Kyle did a thorough job in explaining our new thermostat and the system works really well. I highly recommend GSM!
Joe Buchanan
Just wanted to mention that GSM has serviced my Heat & Air for (4) years. Wayne King sent Kyle Heffeman and some crew to replace the unit last week because (it gave up the ghost). 18 yrs old. They did a fantastic job and put everything back in order all in one day. The new system works great! I highly recommend GSM, they even service our work facility and have done a wonderful job over the years. Very professional and friendly.
Charlotte Mantzaris
The representative, Wayne King, explained clearly the different options available. We were able to follow his presentation easily and he answered our questions readily for further clarification. The crew, the Driscoll brothers and their co-worker arrived at the dates and time scheduled. They were very professional, cordial, gave updates in between and did an excellent job. I recommend them highly.