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Qwentin G.

Qwentin G.

Service Specialist

Rating

Reviews

Qwentin is a dedicated Service Specialist with 4 years in the HVAC industry and a year at GSMS. His hands-on background, honed through working on dirt bikes, drives his enthusiasm for tackling technical challenges and delivering exceptional service. Outside of work, Qwentin stays active by going to the gym and riding dirt bikes.

Qwentin values the supportive and collaborative environment at GSMS, which he considers the best workplace he’s ever experienced. Known for his light-hearted, fun-loving nature, Qwentin is committed to providing high-quality work and treating each client with the care and respect they deserve.

Name: Qwentin Gauvin

Recent Jobs and Reviews

Rated 5.0 out of 5 stars based on 133 customer reviews

Customers say: The overall sentiment is overwhelmingly positive, with customers expressing high satisfaction and strong loyalty. A recurring theme is professionalism: technicians are consistently described as knowledgeable, courteous, friendly, and personable, and many reviewers appreciate their willingness to patiently answer questions and explain the work being done. Punctuality and efficiency come up often, with customers noting that appointments were kept, issues were diagnosed quickly, and work was completed thoroughly. Many also praise the company's responsiveness and communication, including a helpful office team, a smooth scheduling process, and a willingness to accommodate urgent needs. Fair pricing, quality installations, and careful, tidy work habits add to the favorable impressions. Longtime customers describe consistently excellent experiences, while first-time customers express being pleasantly impressed. Many say they plan to keep using the company for maintenance and future projects and would readily recommend it to others, reflecting a strong sense of trust and appreciation.

At a glance

GSMS Air•Heating•Plumbing has completed 25 jobs in October 2026.

The 15 customer reviews shown here average 5.0 out of 5.

The most recent job was on October 21, 2026.

Recent work covers Manchester, NH, Nashua, NH, Stratham, NH, Bedford, NH and Merrimack, NH.

Job Locations and Reviews

Review
In the twelve years that zI have had the ductless mini splits, never has a cleaning been done that I just experienced. I cannot say enough regarding this young man who went above and beyond and paid attention to every detail. It was a pleasant experience and he had incredible patience with my pup who followed him throughout the house.
Diane E - Manchester, NH 03102
Qwentin G.
Qwentin G. Checked in
Completed a deep cleaning on 3 of the indoor units. I cleaned all the air filters with soap and water. I cleaned the outdoor units with coil cleaner and water. I checked all the electrical connections and everything looked good. Inside, I cleaned all the coils with coil cleaner and water. Lastly, I ran all the units on max heat and max fan and everything was running great!
Manchester, NH 03102
Completed furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Completed furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Nashua, NH 03062
Qwentin G.
Qwentin G. Checked in
Replaced the failed roll out switch. Tested operation and everything was working as it should.
Manchester, NH 03102
Completed the gas furnace maintenance. I also completed the mini split maintenance. Everything went great! Please see the attached forms.
Completed the gas furnace maintenance. I also completed the mini split maintenance. Everything went great! Please see the attached forms.
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance. I also completed the mini split maintenance. Everything went great! Please see the attached forms.
Manchester, NH 03104
Completed the furnace maintenance today. I also completed the rinnai maintenance today. Everything went great! Please see the attached forms.
Completed the furnace maintenance today. I also completed the rinnai maintenance today. Everything went great! Please see the attached forms.
Qwentin G.
Qwentin G. Checked in
Completed the furnace maintenance today. I also completed the rinnai maintenance today. Everything went great! Please see the attached forms.
Brentwood, NH 03833
Review
Qwentin always provides knowledgeable and friendly service.
Barry - Manchester, NH 03109
Qwentin G.
Qwentin G. Checked in
Met with Dan. Found incoming gas pressure dropped to much when running the hot water with the furnace. We are going to contact the gas company.
Nashua, NH 03063
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached form.
Manchester, NH 03109
Completed the oil boiler maintenance today. Everything went great! I had to replace the failing capacitor on the exhaust power venter. Please see the attached form.
Completed the oil boiler maintenance today. Everything went great! I had to replace the failing capacitor on the exhaust power venter. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the oil boiler maintenance today. Everything went great! I had to replace the failing capacitor on the exhaust power venter. Please see the attached form.
Chester, NH 03036
Qwentin G.
Qwentin G. Checked in
Replaced the indoor board, heat sink and IPM board. I ran the unit in heating and cooling and everything was working as it should!
Barrington, NH 03825
Review
Very pleased with GSMS!! Today we had Qwentin who did the fall service on our furnace. Super nice young man that is very polite, professional and very knowledgeable. Would highly recommend GSMS! We could not be happier with this company. 5 star!!!!
Pamela - Manchester, NH 03109
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter. Please see the attached form.
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter. Please see the attached form.
Manchester, NH 03109
Qwentin G.
Qwentin G. Checked in
We will need to come back to complete the maintenance with the oem maintenance kit. The client approved the estimate, so we will order the parts and get you on the schedule!
Merrimack, NH 03054
Review
Granite State Mechanical Services is the best! I highly recommend them for all your plumbing & HVAC needs!
Colleen - Manchester, NH 03104
Completed the oil boiler maintenance. Everything went great! Please see the attached form. We will send over a estimate for the toilet repair.
Completed the oil boiler maintenance. Everything went great! Please see the attached form. We will send over a estimate for the toilet repair.
Qwentin G.
Qwentin G. Checked in
Completed the oil boiler maintenance. Everything went great! Please see the attached form. We will send over a estimate for the toilet repair.
Manchester, NH 03104
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance today. I found that heat exchanger is starting to soot up and starting to fail. Tech support said its because of incomplete combustion that has caused the heat exchanger to soot up. We will reach out to you tomorrow with a solution to fix this.
Nashua, NH 03063
Qwentin G.
Qwentin G. Checked in
Replaced the piece of cracked flu pipe. Re lit the hot water heater and the boiler pilot. Everything is nice and connected now.
Manchester, NH 03109
Completed both gas furnace maintenances today. Everything went great! I replaced the filter upstairs and downstairs and I replaced the humidifier pad for the downstairs unit. Please see the attached form.
Completed both gas furnace maintenances today. Everything went great! I replaced the filter upstairs and downstairs and I replaced the humidifier pad for the downstairs unit. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed both gas furnace maintenances today. Everything went great! I replaced the filter upstairs and downstairs and I replaced the humidifier pad for the downstairs unit. Please see the attached form.
Hampton, NH 03842
Completed the gas boiler maintenance today. Everything went great. Please see the attached form.
Completed the gas boiler maintenance today. Everything went great. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the gas boiler maintenance today. Everything went great. Please see the attached form.
Nashua, NH 03062
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached forms.
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached forms.
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance today. Everything went great! I replaced the air filter and the humidifier pad. Please see the attached forms.
Stratham, NH 03885
Completed the boiler maintenance today. Everything went great! Please see the attached form.
Completed the boiler maintenance today. Everything went great! Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the boiler maintenance today. Everything went great! Please see the attached form.
Epping, NH 03042
Review
Qwentin provided excellent service today. He is a very professional and personable young man. Granite State is lucky to have him on their team.
Al - Bow, NH 03304
Completed the furnace maintenance today. Everything went great. I replaced the air filter and the humidifier pad. Please see the attached maintenance form.
Completed the furnace maintenance today. Everything went great. I replaced the air filter and the humidifier pad. Please see the attached maintenance form.
Qwentin G.
Qwentin G. Checked in
Completed the furnace maintenance today. Everything went great. I replaced the air filter and the humidifier pad. Please see the attached maintenance form.
Bow, NH 03304
Completed the gas furnace maintenance today. Everything went great. I replaced the inducer motor capacitor since it was failing. Please see the attached maintenance form.
Completed the gas furnace maintenance today. Everything went great. I replaced the inducer motor capacitor since it was failing. Please see the attached maintenance form.
Qwentin G.
Qwentin G. Checked in
Completed the gas furnace maintenance today. Everything went great. I replaced the inducer motor capacitor since it was failing. Please see the attached maintenance form.
Manchester, NH 03109
Completed the steam boiler maintenance today. Everything went great. It is ready for the winter!
Completed the steam boiler maintenance today. Everything went great. It is ready for the winter!
Qwentin G.
Qwentin G. Checked in
Completed the steam boiler maintenance today. Everything went great. It is ready for the winter!
Manchester, NH 03104
Replaced the failed expansion tank. Replaced the failed air vent. Replaced the leaking pressure relief valve. Replaced the failed temperature and pressure gauge. Replaced the failed autofill and replaced it with a autofill and backflow preventer combo. Purged all the air out of the system and made sure the returns came back hot. Right at the end I noticed that there was a good size crack in the flue pipe going into the chimney. I patched it up with furnace cement for now and told the client that we will be reaching out to get that replaced as soon as possible.
Replaced the failed expansion tank. Replaced the failed air vent. Replaced the leaking pressure relief valve. Replaced the failed temperature and pressure gauge. Replaced the failed autofill and replaced it with a autofill and backflow preventer combo. Purged all the air out of the system and made sure the returns came back hot. Right at the end I noticed that there was a good size crack in the flue pipe going into the chimney. I patched it up with furnace cement for now and told the client that we will be reaching out to get that replaced as soon as possible.
Qwentin G.
Qwentin G. Checked in
Replaced the failed expansion tank. Replaced the failed air vent. Replaced the leaking pressure relief valve. Replaced the failed temperature and pressure gauge. Replaced the failed autofill and replaced it with a autofill and backflow preventer combo. Purged all the air out of the system and made sure the returns came back hot. Right at the end I noticed that there was a good size crack in the flue pipe going into the chimney. I patched it up with furnace cement for now and told the client that we will be reaching out to get that replaced as soon as possible.
Manchester, NH 03109
Completed the gas boiler maintenance today. Everything went great! Please see the attached form.
Completed the gas boiler maintenance today. Everything went great! Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the gas boiler maintenance today. Everything went great! Please see the attached form.
Merrimack, NH 03054
Completed the furnace maintenance today. Everything went great! Please see the attached form.
Completed the furnace maintenance today. Everything went great! Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the furnace maintenance today. Everything went great! Please see the attached form.
Manchester, NH 03104
Completed the oil boiler maintenance today. Everything went great. The air vent was leaking water so I replaced it. Please see the attached form.
Completed the oil boiler maintenance today. Everything went great. The air vent was leaking water so I replaced it. Please see the attached form.
Qwentin G.
Qwentin G. Checked in
Completed the oil boiler maintenance today. Everything went great. The air vent was leaking water so I replaced it. Please see the attached form.
Goffstown, NH 03045
Review
On time, courteous, and efficient.
Tom - Merrimack, NH 03054
Review
Excellent
Raymond - Stratham, NH 03885
Review
Excellence
Raymond - Epping, NH 03042
Review
Excellent!
Jeffrey - Stratham, NH 03885
Review
Qwentin seemed knowledgeable, was very personable, efficient
Nancy - Stratham, NH 03885
Review
Always wonderful with Quentin
Bonnie - Bedford, NH 03110
Review
Overall it was a great experience. From getting the appointment to completion of maintenance, all was smooth.
Ali - Bedford, NH 03110
Review
Great team of technicians keeping my system running both summer and winter
John - Bedford, NH 03110
Review
Excellent service and very knowledgeable technician.
Michael - Amherst, NH 03031
Review
Great service and communication!
Steven - Hollis, NH 03049
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