We're Open & Here For You! Important Coronavirus Information - Click Here to Learn More

Don't Let "Small" Problems Turn
Into Big Ones. One Hour Can Help.

Some of Our Specialties
View More Services
Need Help Now? Call Us 24/7

Special Offers Backed by Our
100% Satisfaction Guarantee

No Matter What You Need, Our Pros Are Ready to Help!

Request an Appointment with Your Local One Hour Team Today.
  • Please enter your first name.
  • Please enter your last name.
  • Please enter your phone number.
    This isn't a valid phone number.
  • Please enter your email address.
    This isn't a valid email address.
  • Please enter your address.
  • Please enter your zip code.
    Please enter a valid US zip code.
  • Please make a selection.
  • Please make a selection.
  • Please make a selection.
  • Please make a selection.

Mount Airy HVAC Company

Heating & AC Experts Serving Frederick County, Montgomery County & Beyond

One Hour Air Conditioning & Heating® of Mount Airy has a long history serving the residents of Mount Airy, Frederick, Gaithersburg, and throughout the Washington DC area. We’ve been in business since 1949 and turned our focus to HVAC service in 1993. Our team has the same goal that we started with: making customers happy and comfortable through excellent heating and AC service. Every member of our team undergoes extensive training and is well equipped to solve any HVAC problem. Our vehicles are so well-stocked with parts that we can finish most jobs in one visit!

Why Maryland Customers Love Our HVAC Services

Even though we operate under the name of a nationally-recognized HVAC company, we’re a proud local business based in Mount Airy. Our team back all their jobs with amazing guarantees that make sure we’re always on time, and we always do the job right the first time. To be as transparent as possible, we also have a StraightForward® pricing guide so you’ll know the costs of all our heating and AC services before we perform them. For local HVAC repair, installation, and maintenance need in Mount Airy, Frederick, or beyond, call the experienced team from One Hour Air Conditioning & Heating® of Mount Airy right now!

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

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

    “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.

    “Air conditioning was out. Called and they came out a few hours later. Quick diagnosis and solution.”

    - Christopher A.

    “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.

    “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
    • Barnesville
    • Beallsville
    • Bethesda
    • Bladensburg
    • Boyds
    • Brentwood
    • Burtonsville
    • Cabin John
    • Chevy Chase
    • Clarksburg
    • Damascus
    • Derwood
    • Dickerson
    • Fort Washington
    • Gaithersburg
    • Germantown
    • Hanover
    • Hyattsville
    • Kensington
    • Lanham
    • Littlestown
    • Montgomery Village
    • Mount Airy
    • Mount Rainier
    • New Market
    • Olney
    • Oxon Hill
    • Poolesville
    • Potomac
    • Rockville
    • Sandy Spring
    • Silver Spring
    • Spencerville
    • Takoma Park
    • Washington
    • Washington Grove
  • Zip Codes We Serve
We may service additional communities. Please contact us for more information.
  • Heroes Club
  • Home Advisor - 100 Reviews
  • Air Conditioning Contractors of America
  • Energy Star
  • Better Business Bureau A+ Black and White Image
  • UWin Black Badge

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.

Part of the Authority Brands Family