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Long Island Heating & AC Repair, Installation & Maintenance

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 heating and AC services are backed by the UWIN Guarantee, which 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!

The Homeowner’s Choice for AC, Heater & Furnace Repairs in Long Island

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! 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 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.”

    “Austin was my tech. He was on time, courteous and professional. Same day service!! Everything is "cool" now!”

    “Wiley was super helpful in explaining the problem, offering cost efficient solutions, and even helping us the following week when we filed our home warranty claim. I will be asking for his support for ...”

    “Gary’s had replaced my air conditioner a couple of years ago. I called them because I smelled a little musty smell from one of my vents. They came out and found my problem quickly, got it fixed and ...”

    “I set up an appointment to have our unit serviced, and Ivan was our technician. He arrived on time, and was very professional. He serviced the unit for the price that was advertised in their TV ...”

    “Doug and Nick did the startup of our new air conditioning unit. They arrived on time, were very nice young men, explained everything at the end and were very qualified technicians. They cleaned ...”

  • 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.
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  • BBB A+ Accredited Business
  • U-Win Satisfaction Guaranteed

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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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