Needed a whole new hybrid unit, inside and outside. John was exceptional. The old unit left in the…read morecondo was horrible and there were so many things wrong that we didn't realize until it finally stopped working. John, James and Kyle went above and beyond the original scope of the work to do a proper install. Needless to say we now have an amazing unit done correctly. He and his crew are meticulous, neat (cleanup looks like no one was working there) and his recommendations were spot on. A real pleasure to have found him. Hopefully I won't need his services in the future but if I do he'll be my first call. Thanks again.

Unreliable! No showed on my first appointment, no follow up or apology offered. Finally came out…read moreand No follow up on the work that is needed. Air conditioning was working prior to Viktor coming out after he left it didn't work again. No response from them via phone message, text message or email sent.

I recommend Comfort works to whoever needs work done in their homes. They were clean and…read moreprofessional from start to finish. They did a wonderful job installing ductless units in my parents house.

From the owner: Comfort Works HVAC has been proudly serving Nassau County customers since 2016. Led by owner John…read moreUzelgok, we provide honest, quality work for Nassau County. As a top HVAC contractor, we specialize in boiler installation, furnace repair, central AC repair, and ductless heat pump services. Whether you need hot water heater repair, HVAC maintenance, or emergency HVAC services, we are your go-to local HVAC contractor. We offer residential and commercial HVAC solutions, ensuring reliable and affordable services. Trust us for HVAC system installation, upgrade, inspection, tune-up, and replacement. Comfort Works HVAC is committed to providing energy-efficient HVAC solutions.

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.

Found this company very professional and economical when looking for a Hvac contractor to install…read moremy Ductless Ac System. We installed a 5 zone Ductless Mitsubishi system that does Air conditioning, Heat and Dehumidifier and am very satisfied with both the system and the Hvac company. I would definitely recommend them for a Ductless System.

From the owner: While focusing on Ductless AC systems only, we have been servicing customers all over Long Island…read morefor over 25 years! No job is too big or small. Call us today to get your free estimate for all your Ductless Air Conditioning and Heating needs.

amazing co with amazing customer service!!! nobody better -…read morehighly recommend Cunningham Duct

Chris did my central air 11 years ago. I needed a new furnace so I called him for an estimate. His…read moreguys came in did quick install and friendly removed old equipment including an old cast iron oil fired water heater and left the place spotless. highly recommended

this was the third time I had them to my house for various issues. they have been knowledgeable,…read moreefficient, friendly, and don't kill me on the price like many of the bigger plumbing companies. I highly recommend them!! thank you for being there!

If you live in the area and use anyone but Alan Gross Plumbing, then you are a fool. Dale came in…read morewith his crew -- all great guys -- and did a top-notch job. No surprises. Dale communicated exactly what needed to be done and they did it. I thought the price was fantastic as well. Cleaned up after the job too. Extremely satisfied. None better.