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® technician will walk you through all costs using our Straightforward Pricing® Guide so there are never any surprise fees.

Berlin, MD

HVAC Service you can count on

4.9

(552 reviews)

Heating & Air Conditioning

Services By One Hour

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HVAC Service Near Me
—Available 24 Hours

One Hour Heating & Air Conditioning understands that heating and air conditioning issues create uncomfortable living situations — especially when temperatures outside are extreme. Luckily, our customer specialists are on standby 24/7 to fix your urgent issues. Whether you need HVAC installation, repair, or maintenance, our HVAC service experts are ready to help.

Emergency HVAC Services

We offer 24-hour emergency HVAC services – even on weekends and holidays – to ensure you have professional support when you need it most. Arriving with service trucks stocked full of specialty parts and tools, we have the equipment needed to fix many HVAC problems on the spot. In the case that additional parts are needed, rest assured – we will do everything in our power to handle your HVAC emergency quickly and efficiently.

Give our team a call today or contact us online to request your same-day HVAC service.

Air Conditioning

Whether you need an emergency replacement, regular maintenance, or installation services, our qualified technicians have the experience and technological resources to get any HVAC job done correctly. We utilize the latest tools, products, and techniques to stay up to date with cutting-edge changes in the industry.

AC Repair

At One Hour Heating & Air Conditioning, our HVAC technicians service all major AC brands and models. Our AC repair team can fix:

Poorly insulated ductwork
Power supply breakdowns
Defective fans or thermostats
Refrigerant leaks
Frozen condenser coils
Blocked condensation drainage
AC short-cycling (turning on and off too quickly)

After inspection, we will provide a detailed estimate.

AC Installation & Replacement

There are many telltale signs that an HVAC unit might need to be replaced. If an HVAC unit is over 10-years old, smells terrible, blows warm air, or produces subpar results as energy bills keep rising, give us a call!

AC Maintenance

For optimal performance, AC units require many parts to work seamlessly together. A single problem can cause a ripple effect of issues. This is why spotting minor malfunctions is critical. With regular maintenance visits, we can ensure your HVAC system is operating smoothly and efficiently. Consider joining our Club Membership for additional customer benefits.

HVAC Services

Common Questions

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Our Happy Customers

Reviews of Delmarva

4.9

(552 reviews)

Rhoda Lewis

09-22-2025

“Austin was professional, prompt, and did a thorough job including sharing knowledge of how we can improve our air quality during construction.”

Tylor Lennox

09-17-2025

“My service technician, Austin S. was timely, friendly, and professional! My experiences with one hour heating and air and their team have been nothing but positive. Thanks!”

David Andonian

09-17-2025

“Great customer service”

Marion Newbold

09-15-2025

“TJ did a wonderful job on a major repair recently. All of the technicians and office staff are knowledgeable, professional and very personable. They answer all questions and concerns quickly and we have appreciated our many, many years of working with the whole team!”

Marcia Love

09-15-2025

“Matt, our HVAC technician, was great at communicating what he was doing and what was needed. He showed me photos of the before and after of all he did. One photo was of a pretty serious problem. His recommendation to repair and prevent future problems worked well. For a little more than the cost to repair, I got his recommendation of an excellent filtering system. I trusted in making this choice bc of Matt’s clear explanations. Very happy with this company’s work.”

Scott Furman

09-10-2025

“TJ was awesome. He was on time and completed the repairs in no time at all. Thank you so much.”

Anthony Marano

09-08-2025

“Was polite showed up on time did a really good check up on my system even in the crawlspace under the house”

Maryanne Joynes

08-27-2025

“Very good customer service”

M Christoforou

08-26-2025

“TJ was tasked with fixing a HVAC system that lost power to it for inexplicable reasons…he stuck with a complicated troubleshooting and he was able to get the system restarted and thriving. We are so grateful to him, Brandon and Aiden for taking such good care of our system and us! Shout out to Kyle as well for excellent HVAC recs for a new updated system!!! Maryanne and Chris”

Marlin Deacon

08-20-2025

“Austin was great! very professional and personable.”

Servicing your entire home

Part of the Authority Brands Family

Authority Brands is the leading provider of in-home services, building brands that support the success of franchisees as well as better the lives of the homeowners we serve and the people we employ.