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AC & Heating Company In Gaithersburg

Keeping You Comfortable All Year Long

When the weather outside is unbearable, you want to know that the temperature inside your home will always provide the relief you need. At One Hour Air Conditioning & Heating® of Gaithersburg, we are here to ensure that’s always the case. We are an AC and heating company in Gaithersburg that provides a wide range of repairs, replacements, and maintenance services. The seasons in Maryland can be tough, from bitterly cold winters to hot and humid summers. You deserve the peace of mind of knowing that your HVAC system is prepared for anything Mother Nature has in store.

In addition to heating and cooling services, our Gaithersburg HVAC team also offers air quality services, duct cleaning, and thermostat repairs. The comfort of you and your family is our top priority and our trained and experienced Comfort Specialists are ready to get to work.

Always Available, Guaranteed Satisfaction

It’s not uncommon for your heater to break down in the middle of a snowstorm or your AC to give up at the height of a heatwave. It seems as though these kinds of problems arise at the worst possible times. That’s why we are always here to help. Our Gaithersburg HVAC company offers 24/7 emergency services so that we can restore comfort to your home as quickly as possible.

One Hour Air Conditioning & Heating® of Gaithersburg is a locally owned company backed by a national name. We are a leading provider of HVAC services and are committed to being the best. That’s why we back our services with our 100% satisfaction guarantee. And because your time is valuable to us, we offer our On-Time Guarantee. We promise to be on time or else your service is free!

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

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

    “Jonatan and Osman were an excellent team to install the steam humidifier on a recently installed HVAC system. The two are friendly, professional, and thorough. They respected the home environment. ...”

    - Brian D.

    “We've used One Hour Air Conditioning & Heating for a number of years now and have always been satisfied with the work performed by their service personnel. This is the first time that Larson has ...”

    - Robert W.

    “Austin and team were extremely professional and efficient. We’ve been using One Hour for many years and have always been very satisfied with the service. The team always does a great job and ...”

    - Vernessa P.

    “I am very happy with this company, I look forward to doing many years of business with them. So far each employee has treated my home as if it was their own. In this day and age that kind of pride in ...”

    - Josh P.

    “Larsen Kimble called in advance of arrival. He was on-time. He was friendly and personable. Also very informative and explained everything he did. He wore shoe covers in the house and a mask at all ...”

    - Michele W.

    “We are in the process of having a new Air conditioning and heating system put in so far the process has been very professional and quick. Our new system will not be put in until next week however they ...”

    - Josh P.
  • Areas We Serve
    • Ashton
    • Barnesville
    • Beallsville
    • Boyds
    • Brinklow
    • Brookeville
    • Cabin John
    • Clarksburg
    • Derwood
    • Dickerson
    • Gaithersburg
    • Germantown
    • Montgomery Village
    • Olney
    • Potomac
    • Rockville
    • Sandy Spring
  • Zip Codes We Serve
    • 20818,  
    • 20830,  
    • 20832,  
    • 20833,  
    • 20838,  
    • 20839,  
    • 20841,  
    • 20842,  
    • 20847,  
    • 20848,  
    • 20849,  
    • 20850,  
    • 20851,  
    • 20852,  
    • 20853,  
    • 20854,  
    • 20855,  
    • 20857,  
    • 20859,  
    • 20860,  
    • 20861,  
    • 20862,  
    • 20871,  
    • 20874,  
    • 20875,  
    • 20876,  
    • 20877,  
    • 20878,  
    • 20879,  
    • 20882,  
    • 20884,  
    • 20885,  
    • 20886,  
    • 20898
We may service additional communities. Please contact us for more information.
  • Google Guaranteed Partner
  • Heroes Club
  • Available 24/7 Blue
  • Air Conditioning Contractors of America
  • Energy Star
  • UWin Badge Gold and Green
  • BBB A+ Rating
  • PHCC Red Logo

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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