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Long Island Heating & AC Repair, Installation & Maintenance

Reliable Long Island HVAC Service from a Local Team

One Hour Heating & Air Conditioning® of Long Island is the premier provider of HVAC services for Long Island, including Suffolk and Nassau counties. Our team is highly trained, courteous, and always on time! We’ve earned our reputation for providing great service by adhering to a strict code of ethics and never settling for providing less than a customer deserves. Besides sending a highly trained tech to your home, we also send a well-stocked vehicle, which means our experts can complete most jobs in just one visit.

All our Long Island heating and AC repair, installation, and maintenance services are backed by the UWIN Guarantee. This ensures that we use only high-quality materials and solutions for your home's comfort. Our team provides HVAC repair and installation services to residents in Nassau and Suffolk counties, including Deer Park, Bay Shore, Melville, Huntington, Medford, Riverhead, and all throughout Long Island. Whether your heater breaks on the coldest night of the year or your system needs regular maintenance, One Hour Heating & Air Conditioning® of Long Island is ready to help!

Why Our Long Island HVAC Company Is Trusted

We’ve gathered a loyal base of customers because of our dedication to their happiness. We provide neighborly service because we are your neighbors! One Hour Heating & Air Conditioning® of Long Island might carry the name of a nationally-recognized HVAC brand, but we’re an independently owned and operated business in Deer Park, NY. As a One Hour location, we provide some of the best guarantees in the industry. We promise that you’ll be 100% satisfied with our heating and air conditioning services, that we’ll show up on time, and that we’ll provide upfront prices! If any aspect of our work doesn’t meet your expectations, we’ll make it right at no cost to you. Whether you need an emergency Long Island AC repair or want to make sure your heater is ready for the winter weather, we're ready to help. You’ve got nothing to lose, call our Long Island HVAC service pros today!

Always On Time... Or You Don't
Pay A Dime

We Have A Reputation For Being Punctual, Friendly, and Knowledgeable

    “I want to thank Steve, Shawn, Matt, and Justin for a superb job replacing my air conditioner and heating unit. They were very thorough and did not mind answering my questions about the new units. I ...”

    “In the pouring rain Austin came and was outside thawing out 8" of ice that had built up... Problem solved and he only charged me $99 total!! I trust One Hour AC/Heating.. they're like no other.”

    - Susana C.

    “Jonathan W. was personable, friendly, professional, thorough, honest in his evaluation and worked hard! You have a jewel in this young man.....he is a keeper!”

    “Hope is the epitome of excellence in customer service and professionalism. She explained the process of repairing my A/C every step of the way and gave me what the estimate before each action. I ...”

    - Jonathan P.

    “I want to thank One Hour for resolving my A/C unit problem. Everyone that came out was amazing. My husband and I are so impressed with their commitment to make sure that we were happy and pleased with ...”

    - Evelyn

    “I want to thank you for your excellent service. Abdiel answered all my questions and was very professional. He gave me peace of mind and complete comfort. I know I am in good hands with your company.”

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  • Areas We Serve
    • Albertson
    • Amagansett
    • Amityville
    • Aquebogue
    • Atlantic Beach
    • Babylon
    • Baldwin
    • Bay Shore
    • Bayport
    • Bayville
    • Bellmore
    • Bellport
    • Bethpage
    • Blue Point
    • Bohemia
    • Brentwood
    • Bridgehampton
    • Brightwaters
    • Brookhaven
    • Calverton
    • Carle Place
    • Cedarhurst
    • Center Moriches
    • Centerport
    • Central Islip
    • Cold Spring Harbor
    • Commack
    • Copiague
    • Cutchogue
    • Deer Park
    • East Hampton
    • East Islip
    • East Marion
    • East Meadow
    • East Moriches
    • East Northport
    • East Norwich
    • East Quogue
    • East Rockaway
    • Eastport
    • Elmont
    • Far Rockaway
    • Farmingdale
    • Floral Park
    • Franklin Square
    • Freeport
    • Garden City
    • Glen Cove
    • Glen Head
    • Glenwood Landing
    • Great Neck
    • Great River
    • Greenlawn
    • Greenport
    • Greenvale
    • Hampton Bays
    • Hauppauge
    • Hempstead
    • Hewlett
    • Hicksville
    • Holbrook
    • Holtsville
    • Huntington
    • Huntington Station
    • Inwood
    • Island Park
    • Islandia
    • Islip
    • Islip Terrace
    • Jamesport
    • Jericho
    • Kings Park
    • Laurel
    • Lawrence
    • Levittown
    • Lindenhurst
    • Locust Valley
    • Long Beach
    • Lynbrook
    • Malverne
    • Manhasset
    • Manorville
    • Massapequa
    • Massapequa Park
    • Mastic
    • Mastic Beach
    • Mattituck
    • Medford
    • Melville
    • Merrick
    • Mill Neck
    • Mineola
    • Montauk
    • Moriches
    • New Hyde Park
    • New Suffolk
    • North Babylon
    • Northport
    • Oakdale
    • Ocean Beach
    • Oceanside
    • Old Bethpage
    • Old Westbury
    • Orient
    • Oyster Bay
    • Patchogue
    • Peconic
    • Plainview
    • Port Washington
    • Quogue
    • Remsenburg
    • Ridge
    • Riverhead
    • Rockville Centre
    • Ronkonkoma
    • Roosevelt
    • Rosedale
    • Roslyn
    • Roslyn Heights
    • Sag Harbor
    • Sagaponack
    • Sayville
    • Sea Cliff
    • Seaford
    • Shelter Island
    • Shelter Island Heights
    • Shirley
    • Shoreham
    • South Jamesport
    • Southampton
    • Southold
    • Speonk
    • Syosset
    • Uniondale
    • Upton
    • Valley Stream
    • Wading River
    • Wainscott
    • Wantagh
    • Water Mill
    • West Babylon
    • West Hempstead
    • West Islip
    • West Sayville
    • Westbury
    • Westhampton
    • Westhampton Beach
    • Williston Park
    • Woodbury
    • Woodmere
    • Wyandanch
    • Yaphank
  • Zip Codes We Serve
We may service additional communities. Please contact us for more information.
  • Available 24/7 Blue
  • BBB A+ Accredited Business
  • U-Win Satisfaction Guaranteed
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Here for You Around the Clock

Our Comfort Specialists are available to help, no matter the time of day. If you're in need of emergency services, we've got you covered 24/7.

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