Reliance Mechanical Services is your Full Service HVAC Solution! (631) 787-2600 |

Residential HVAC Services

Reliance Mechanical Services has been in the forefront of NY residential HVAC solutions.

Commercial HVAC Services

We take great pride on our teams expertise as HVAC specialist with years of industry experiences.

Retail & Restaurant Services

At Reliance Mechanical Services we are grateful for the opportunity to provide you high quality service.


At Reliance Mechanical Services, we are proud to consider ourselves Long Island’s most reliable, full service HVAC contractor. We provide free consultations so we can help you design a package that best suits the need of your property and your finances. Allow us the pleasure of securing the comfort for your residential and or commercial needs. Please feel free to contact our helpful team of consultants today.

Visit our "Our Team" page to find out more about your trained comfort consultants. We look forward to hearing from you! Reliance Mechanical Service provides HVAC services to the five boroughs. Call us at 1 (631) 787-2600 today. 


Our Clients

View All

I have dealt with many service-oriented firms in my life, and can truly appreciate a quality organization such as yours. I have always had a prompt response from your organization to my service calls and questions.

Rich B.

We deal with dozens of trades on our job site and would rank but RMS is one of the top three trades that are a pleasure to do business with. They possess immeasurable work ethic and consistently display a high degree of integrity and professionalism.

Thomas P.

Just a note to thank you for your prompt handling of our service call to repair our air conditioner. Also your repair service man Frank G. was not only efficient, but quiet and neat, above and beyond his requirement.

South Shore Medical Care & Diagnostics