Your Comfort Is Just A Call Away

Mount Airy Heating & Cooling Experts

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

Free Replacement Estimates Upgrade Today and Save on Your Energy Bills! One Hour Air Conditioning & Heating® of Mount Airy Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply. Expires Aug 30, 2020

See All Coupons

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

Request an Appointment with Your Local One Hour Team Today.

First Name*
Please enter your first name.
Last Name*
Please enter your last name.
Phone*
Please enter your phone number.

This isn't a valid phone number.
Email*
Please enter your email address.

This isn't a valid email address.
Address*
Please enter your address.
Zip*
Please enter your zip code.

Please enter a valid US zip code.
Are you a new customer?*
Please make a selection.
How would you prefer to be contacted?*
Please make a selection.
Preferred appointment time?*
Please make a selection.
Is this an emergency?*
Please make a selection.
How can we help you?

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

‘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.
We Love What We Do
Our trained Comfort Specialists are friendly,
knowledgeable, and genuinely love helping people.

Learn More About Us

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

“Austin provided expert, professional service and explained the work performed. I am extremely satisfied with One Hour Heating and Air Conditioning.”
“WOW, what savings. I will recommend your services and equipment for everyone.”
- Diane D.
“I thought that it was going to be a mess (getting ducts cleaned) but they were very neat and professional and they had taken their time to do it right. Well done and I only wish I did it sooner.”
- Ira G.
“Dave from One Hour Air and Heating did a great job.”
- Paul M.
“Called and let me know when he would arrive, did a very thorough job of checking everything.”
- David D.
“I will stick with them and would recommend them to others because they are very good at keeping to their schedule and being responsive. Their workers are professional, clean, and, they respect your house and you.”
- Marty V.