Let Us Make Your Home Feel Like Home

Oceanside Heating & Cooling Experts

Always On Time...

  • ‘Round the Clock Availability

    No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.

  • 100% Satisfaction Guarantee

    We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.

  • StraightForward Pricing® Guide

    Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!

  • Always On Time…Or You Don’t Pay A Dime!®

    We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

Get the Best Service Around

Our Happy Customers

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.

  • “Will always ask for Jose when we need our furnace and air conditioner ready for the summer and winter. Again thank you, Jose! Great job!”

    - Patricia M.
  • “Mike P was extremely knowledgeable helpful and patient he took his time to check out our system and to see what was wrong and gave us options for repair. Truly appreciate all his help.”

    - Majko Veit | deer park, NY
  • “I have been very impressed with the standard/routine maintenance services as well as the duct cleaning, The technicians were courteous, knowledgeable, thorough, and conscientious. They explained the ...”

    - Nicole Knickmeyer | Clarksville, TN
  • “I had the best experience with One Hour Air Conditioning! Jose was the gentleman who was sent to my home and he provided excellent service. He was very knowledgeable, he fixed my AC problem and was ...”

    - Elena del Moral | Miami, FL
  • “I just want to say Thank you to Sheena James, i didnt actually have any services done, i was just inquiring about yall services, but Sheena was very helpful friend courteous and knowledgeable about ...”

    - Ida Thomas | Missouri City, TX

Exceptional AC & Heating Company in Nassau County

Repair, Installation, and Maintenance Services That Never Take a Break

There are times when it feels like the Tundra has nothing on Nassau County, with average lows of 17 degrees Fahrenheit in winter. With temps like that, it’s vital to have an AC and heating company you trust to ensure you never have to experience the horrors of a broken water heater or an aging furnace. One Hour Heating & Air Conditioning of Nassau County is ready to tackle AC and heating repair, installation, and maintenance services for homeowners in and around Nassau County. We offer guaranteed and warrantied workmanship, competitively priced solutions, and services that don’t sleep or get tired—i.e., 24 hours a day, 7 days a week for complete convenience.

Schedule your appointment today or call (516) 862-4994 for more information about our Nassau County HVAC company.

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100% Satisfaction Guaranteed

The One Hour Difference

One Hour Heating & Air Conditioning of Nassau County is your one-stop HVAC company for various comprehensive services and a commitment to putting you first. But those aren’t the only reasons customers consider us a go-to provider in Nassau County.

One Hour is a trusted name in the area because:

  • We will give you concrete appointment times. You’ll never get arbitrary appointment ranges, wondering if we’ll arrive between 3 p.m. today and 9 a.m. next month.
  • We offer 24/7 emergency services. Blizzards and heat waves don’t throw in the towel when your HVAC conks out, and neither do we. We deliver our AC and heating repair, installation, and maintenance services day and night.
  • We have extraordinary technicians. While we call our technicians “comfort specialists,” we consider them magicians because they work magic on your heating and cooling systems. And they do so with your satisfaction in mind.
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Frequently Asked Questions

  • What does the One Hour mean in your company name?

    The ‘One Hour’ in our company name indicates our guarantee to be at your home in the predetermined window quoted when you set your appointment. If we do not show up within that window, your service call fee is waived.

    1. Express Appointment: This is an appointment that is scheduled during a specified one-hour time slot. You are promised that a technician will arrive at your home within this one-hour time window. You will also receive a call when the technician is en route to your home.

    2. Reserved Appointment: This is an appointment that is scheduled during a specified, two-hour time slot. You are promised that a technician will arrive at your home within this two-hour time window. You will also receive a call when the technician is en route to your home.

    3. Standard Appointment: This is an appointment that is scheduled during a specified four-hour time slot. You are promised that a technician will arrive at your home within this four-hour time window. You will also receive a call when the technician is en route to your home.

    4. Stand-By Appointment: This appointment is for overflow situations. This appointment will not have a specified time. You will receive a call when the technician is en route to your home.

    5. Emergency Appointment: This appointment is for an unspecified time after normal business hours Monday – Saturday and all day on Sundays/Holidays. Calls are dispatched in the same order they are received. You will also receive a call when the technician is en route to your home.

  • Do you service emergencies after-hours?

    Yes, we offer emergency services 24-hours a day, year-round.
  • How much will my service cost?

    The size and complexity of your HVAC issue will determine the cost. Because our trained, licensed HVAC technicians must diagnose the issue before we are able to quote you an accurate cost, we require an appointment to be set to complete a diagnostic on your system. Once the diagnostic is complete, your One Hour(R) technician will walk you through all costs using our Straightforward Pricing(R) Guide so there are never any surprise fees.
  • How often should I service my HVAC system?

    It’s ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.
  • How often do I need to change my HVAC filter?

    Your filter should be changed every one to three months, depending on conditions in your home and your region’s climate.
  • Do you offer purchase financing?

    We work built relationships with several lenders to ensure our customers are able to restore comfort in their homes. Ask your technician about your financing options.
  • What are the advantages of a smart thermostat?

    Smart thermostats learn a household's patterns and adjust heating and cooling according to when a home is occupied, give homeowners the ability to control the thermostat remotely, and enable homeowners to reduce their energy use, saving you money.
  • What is HVAC?

    HVAC means Heating, Ventilation, and Air Conditioning. HVAC systems refer to air conditioners, furnaces, and any unit that cools indoor spaces during the summer and warm them in the winter.

    In general, an HVAC system takes in air, heats or cools that air, and blows it into a room or any indoor space. While many homes have separate air conditioning and heating units, others have a heat pump that cools and heats the house.

    Not only do HVAC systems maintain desired temperatures, but they also improve indoor air quality and regulate humidity levels. But most importantly, these units provide comfort all year round.

  • What is a SEER Rating?

    The SEER (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER rating, the more efficiently a unit operates. The SEER rating of any given unit can range anywhere from 13 to 21.

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