We needed both out central air units replaced. This was a large job. Kyle was awesome. He was…read moreprompt and professional. He went over our options and walked us through the process of upgrading our entire system. His crew was courteous and diligent. I highly recommend Absolute Zero .

5 Stars - Honest, Quick, and Professional!…read more I had a great experience with this local HVAC company and highly recommend them. Our AC stopped working during the start of a heatwave, and Kyle was able to get out to us quickly. He was absolutely fantastic--friendly, professional, and incredibly knowledgeable. What really stood out was the honesty. Kyle diagnosed the issue fast, explained everything clearly, and made the repair without trying to upsell us on anything we didn't need. That kind of transparency and integrity is rare these days, and it's exactly why I'll be calling them again for any future HVAC needs. Thanks again to Kyle for the excellent service from start to finish!

Lots of delays, missed appointments, damages, will not honor warranty…read moreWorst contractor I ever worked with in my entire life ! Stay away!,,

Total life saver! I'm a new home owner. Trying to save on oil, Well, I forgot about all that…read morenonsense during the holidays and ran out of oil over night and the burner would not restart. Called as an emergency and they prioritized me to get same day service. A totally awesome experience. Tech was awesome and got me up and running, I'll be calling for my yearly maintenance with these guys!

I'd like to thank John and Jimmy from ZSL for their quick and efficient response time and service…read more With exceptional customer service, they explained in detail what the issue was and what they did to resolve it.They are very knowledgeable in there profession, and compassionate about the work. . I appreciate the hard work and effort put forth. Thank you!

Completed several projects this year. All we're completed quickly, efficiently and done right the…read morefirst time. Costs were a bit higher then average, but we'll worth it. ZSL explained everything and guarantees all their work.

I filled out a request on 6/26 for estimate on updating one of three R22 central Air systems in my…read morehouse. Filled in all my contact info and after three days no call or email. I understand that this is a very busy season but not a call or email for just an appointment is not good. I do not understand why some companies even offer the option to fill in for a request on their web site. I filled out three other requests and with a day they provided me with an appointment. It's a shame because I liked the puppy sitting with the owner! Update on 07/1 I called again and this time I spoke with Christian who set up an appointment for 7/03 between 1-3pm.

Thank you to everyone at Therm A Trol in Blue Point NY for your professionalism... We are so…read moregrateful. Very dependable company ...we are 100% satisfied with every aspect of a job well done. The H Vac system is great!! Installed perfectly in a timely fashion. Immaculate when the job was done .. Thank you again . Mr. and Mrs. Jim Wenz Bayport NY

Our central AC stopped running on Monday night. I called several friends for referrals but their…read moreHVAC technicians couldn't help us until next week. I used yelp and Home advisor to read reviews. I called GMG at 6:30 a.m. and spoke with Andrew. He was honest and told me that he could send a technician the following day. He gave me a 2 hour window and called me 30 minutes before Joseph showed up. Joseph diagnosed the problem right away. Replaced a part and had our AC working in less than 45 minutes from his time of arrival. I highly recommend this company. Can't wait to recommend my friends and family to GMG! I'm so happy we have an HVAC expert to call anytime (24/7 emergency.) I give them a five star review for their expertise in diagnostic of the problem, honesty, reliability, and punctuality. Thank you Andrew and Thank you Joseph!!! Job well done!!! You guys are the best! Thanks!!!

6/2026 UPDATE: After writing my original review a couple of…read moreyears as the time service was excellent and timely, it has drastically gone way down. I called their office 5 times from December 2024 until early the following year to get a proposal for a mini split, never received a return call to either schedule an appointment or provide a proposal as they know my house well. Miscommunication with a contract which took several months to correct when billing an additional amount. However, during the spring service call the billing had not yet been fixed and the technician Angel was instructed to remove my water ordered for my whole house filtration system without telling me. I only discovered it when Angel as to access the boiler room. (This same technician left my hallway walls dirty after I had just had them painted. Fortunately, I was able to clean them.) I knew no servicing was to be done until Winter so I asked why which he responded he was taking the filters that belonged to GMG. I advised that I ordered them and they belonged to me with an adjusted invoice only for the filters and not install. When I had the winter service performed in November 2025, I addressed the duplicity with Joe and the lack of a quote for a mini split. He stated that Andrew was bad at communicating and would share my concerns. I waited to hear from Andrew, nothing so I reached out. An appointment was scheduled and the understanding that the contract would be amended one time only to include the service for water filtration unit which had not been done under the previous contract. No revised contract received and appointment not kept. Since November, I reached repeatedly via text, voicemail and email to receive the corrected contract and then to schedule the spring service, NO RESPONSE! I'm attaching screenshots of the text messages and emails. I then asked to provide me the type of filters so I can get another company to do the work, STILL NO ANSWER with no attempt to address the matter. IT'S A TOTAL LACK OF PROFESSIONALISM; JUST CHILDISH BEHAVIOR! On top of all this, I receive on a regular basis emails to provide a review on a link to them only, not on Google. Well you got your review to your company directly and not on Google. I NO LONGER RECOMMEND THIS COMPANY!!!!

I needed my new AC units cleaned in my building bc they were all leaking. Taylor Air was able to…read moreget to me within a few hours. Super professional and sensible pricing.

Greg responded to my email request on a sunday night at almost 9pm within 3 minutes. He offered me…read morenext day service, which I was unavailable for. We scheduled a time. Which I ran 30 minutes late for unfortunately. He was easy going about it, and showed up friendly, and smiling. He was professional, courteous, knowledgeable, reasonable, and thorough. I would highly recommend him to anyone.

I asked for a vac and tune up for my oil burner cause my chimney was smoking and was quoted $200…read morethe service man came without a vacuum so he clogged up the one i lent him and he never looked at my flu or heat exchanger He did change the oil filter which was dripping after he left, he also insisted on an extra $40 for parts and a tip! because my chimney was still smoking I hired another company which was very professional they found the wrong oil filter installed and the rubber gasket missing, the wrong nozzle, heat exchanger almost blocked off with soot after they finished the boiler was running great and no more smoke I would never recommend this company!

From the owner: Make you well again read more