We are Reliance Heating and Cooling on Long Island

Where Quality Service and Customer Satisfaction Go Hand in Hand

The team at Reliance Heating and Cooling is committed to providing outstanding services for your furnace, boiler, air conditioner and much more! We want you to be comfortable in your home all year long. Our technicians are able to handle virtually any HVAC issue using state-of-the-art solutions and the highest quality parts and equipment. Our courteous and friendly professionals have the resources to effectively resolve any heating or cooling problem, even offering emergency services when you need us most. As a full-service heating and cooling company based in Islandia, Reliance serves all of our friends and neighbors throughout, Nassau County, and Suffolk Counties.

We look forward to hearing from you! Call us today at (631) 619-2529 to schedule your service or email info@relianceheatingandcooling.com to inquire or  ask about our specials.


You Can Rely On Reliance Heating and Cooling Day or Night

Comfort You Can Count On

  • 24/7 emergency service & support
  • Trained comfort consultants
  • Full-service HVAC solutions
  • Flexible financing & payment options
  • Decades of industry experience
  • Licensed, insured, & highly certified
  • 1-Year part & labor warranty
  • Free estimates available

Our Services in Suffolk & Nassau County

Experienced & Knowledgeable Technicians

Our Long Island based heating and cooling technicians have years of experience in the HVAC industry and are well aware of the common issues that affect most brands of boilers, furnaces, air conditioners, heat pumps, and much more. Our Factory trained technicians can handle the simplest issues to the most complex problems imaginable. We keep you informed every step of the way, from the time you call until the job is done and you are satisfied. As a fully licensed and insured contractor and a proud member of the BBB, we will guarantee the best customer experience possible.

You and your family are important to us, which is why we always work to provide the most effective heating and cooling services based on your budget and immediate needs. When you need help with your heating or cooling comfort, you can always rely on Reliance Heating and Cooling to be there for you day or night.

Why Our Customers Rely On Us

For All of their Heating & Cooling Needs
  • “Solved my problem with some replacement parts for a very reasonable cost.”


  • “Tom from Reliance came and with a stock part off his truck, he was able to get me up and running.”

    Jordan B.

  • “pool service”

    Jackie M.

  • “Job Well Done!”


  • “He was personable, took the time to explain everything and had us up and running in no time!”

    Fran M.

  • “Will definitely keep Reliance as my service provider!”

    Alexis H.

  • “Love that they have membership agreements and will show up when they say they will. ”

    Kathy M.

  • “They were at my home within a few hours and Joe was amazing.”

    Jerry R.

  • “I have dealt with many service-oriented firms in my life, and can truly appreciate a quality organization such as yours.”

    Rick B.

  • “Can't say enough!”

    John K

  • “I can always count on Reliance”

    Donna from Century 21 Princeton Properties Realty

  • “I am very grateful for the excellent service we received!”

    Peter S.

Contact Us Today!

631.619.2529 95 Hoffman Lane
Islandia, NY 11749
Map & Directions [+]
Master Plumber License: 58643-MP
Restricted Plumber license: 57561-RP
Restricted Electrician License: 56970-RE
We're Open - Contact us 24/7
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