“I had my first experience with A&S Nathan HVAC on April 29, 2025. Making the appointment was a breeze. Received cordial service over the phone. On the day of the service (tune-up and cleaning of 2 C/A units and also oil furnace) the technician Dave M. arrived on time and was very pleasant. He was neat and efficient. I call the office and ask that they give him a raise as they needed to retain him as an employee!! I am VERY happy with the service that I received and will use this company every year going forward for all my HVAC needs. D. Anderson”

- Daria

“If oil furnace abuse was a crime, I'd be writing this from Sing Sing. I've neglected my Weil oil furnace for a few years and it finally had enough of my abuse. So after looking for a local highly rated company to service my house in hamden we called nathan, and a wonderful gentleman named Ricardo came over to service the furnace id unknowing been abusing for years. Now nobody likes hearing youre major appliances are in need of multiple life saving measures and nobody likes spending money, but Ricardo showed me everything that was caked in black tar or oozing muddied oil, he kept a running tally of my expenses so I wouldn't stroke out with the final number and he stayed to walk me thru everything and gave me a rudimentary idea of how this heater id owned and abused for years actually worked. On a Friday at rush hour no less. So the money spent has already brought forth an amazing hot shower and for once I have complete confidence in the work and integrity of a contractor. Thank yoy A&S nathan and especially thank you Ricardo for your patience, your explanation and your ability to deliver news i was fearing in the most human and understanding of ways. Quality human being, fantastic technician and a quality company. I highly recommend using them when you're done having your brother in law fix your furnace, or are worried you'll receive a fly by night poorly done job. They did a grest job at a fair price. Thanks guys.”

- Walt Bradley

“Dave was amazing! Honest and quick to fix the problem! Thank you”

- Michele Ambrosini

“These guys are great! The person who took the call was helpful, knowledgeable & friendly. Mark & Larry arrived in a very timely manner, they were also very friendly & knowledgeable and remedied the issue very quickly. I highly recommend this place!”

- Jonny

“"Wow wow wow! What a fantastic company. A&S Nathan saved us from baking last week during the biggest weather challenge of the Summer so far! They arrived earlier then the time frame quoted and then they expertly installed a high efficiency A/C system that replaced our original 35 year old unit, which required considerable redesign to connect the new system to the existing duct work. Their workmanship was excellent. Thanks to Jake, Heather, Mark, Paul, and everyone else for a job well done. We all will sleep cool this Summer and many Summers to come!" PS: The dog's are happier than we are!!!”

- Martin Goldschmidt

“The best of the best. My husband and I own a local real estate company and always refer them to our buyers and sellers! They are affordable, reliable and professional! All their techs are very knowledgeable and answer any questions!”

- Marissa Papa

“A&S Nathan was easy to schedule, timely and professional. I was very pleased with their services!”

- Marlene Piscioniere

“Had my oil tank replaced today, the whole experience was a pleasure, from the first phone call I placed to the installation everything went smooth, and the price was right. I highly recommend AS Nathan”

- Jonathan Champagne

“Woke up this week to a freezing cold house and a non-functioning furnace. We heard about A&S Nathan Last year from friends, how happy they were with the service. We figured we would call never believing that they would come right out, After all, we are total strangers to this company. From the phone call and leaving a message and getting a return phone call within minutes, The exceptional customer service began. They gave us a time that they would be out And the technician arrived within that time! Very professional, friendly, Knowledgeable And patient. We are extremely impressed with this company and hope we have established a long-term relationship with them now. The service technician even folded up the drop cloth that we had laid on the floor for him to walk on before he left! Who does that? Thank you for your exceptional service!!”

- Patti Iannucci

“I have been using A and S Nathan heating for a couple years now . Very professional, helpful and on time . Mark came out to my moms at 8:00 on Friday night . Dispatch told me where he was and what time he will be there . Mark showed up early , was very helpful in explaining to my mom what happened . He fixed both problems in a short time . Thank you guys for showing up and fixing everything so fast and helping my mom out on a Friday night !!! Definitely suggest calling if you have any heating problems !”

- Jeano Carloni