Let Us Make Your Home

Feel Like Home

One Hour Air Conditioning & Heating® of Columbia

Call Us(301) 918-5642

4.9 avg (179 Reviews)

Here For You

When You Need Us Most!

Yellow One Hour Heating & Air Conditioning service van with company branding and slogan.

'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.

Learn More About Us

100% Satisfaction Guaranteed

Columbia

HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in Columbia, MD

When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.

At One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.

or Call us at (301) 918-5642

Heating & Air Conditioning

Services By One Hour®

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Need HVAC Help ASAP?

Call Us Today at (301) 918-5642

Our team will take your call 24 hours a day, seven days a week. Below are our service hours of operation.

Monday:

9:00 AM - 5:00 PM

Tuesday:

9:00 AM - 5:00 PM

Wednesday:

9:00 AM - 5:00 PM

Thursday:

9:00 AM - 5:00 PM

Friday:

9:00 AM - 5:00 PM

Saturday:

Closed

Sunday:

Closed

One Hour Heating & Air Conditioning technician standing by a branded service van, ready for a home service visit.

Frequently

Asked Questions

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.
Yes, we offer emergency services 24-hours a day, year-round.
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.
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.
Your filter should be changed every one to three months, depending on conditions in your home and your region’s climate.
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.
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.
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.
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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Columbia

HVAC Services Have Great Guarantees

Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, weâ€™re an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForwardÂ® pricing guides for your benefit, and will pay you back for being even one minute late to an appointment.

Find out for yourself why customers love what we do by calling our Columbia HVAC repair, installation, and maintenance team today!

or Call us at (301) 918-5642

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.

Read More Testimonials

“Larson was very technically inclined, knowledgeable of my situation and communicated all details necessary for the job resolution.”

Donald Brooks

“Dwight, Larson and the entire crew performed magnificently installing my new air conditioner. The job took the entire day! On time, polite, experienced, appreciative, describes the entire workers! You cannot go wrong engaging One Hour Air Conditioning— they are great !!!”

Gary

“Fantastic workmanship, extremely knowledgeable. He and his crew did a great job with the installation, I couldn’t be more impressed!”

Marcus Mingo

“We received fantastic service from Larson when he came out to review and perform a quality control inspection on our new HVAC install. He was even able to work thru our outstanding permit inspections with the county for us to get them resolved. Larson was very knowledgeable in the HVAC system mechanics and was so patient in answering our questions. He’s to be commended for pointing out a serious electrical issue with our outside lead wire where the elements had deteriorated the protective covering; which if not corrected, could have been an electrical hazard for us. One Hour should be proud to have such a remarkable employee as Larson!”

J Katona

“On time, knowledgeable, personable; and answered all my questions. After making changes to our system, he tested and tested again for good measure. All around GREAT service and experience. I would definitely recommend One Hour Heating and Air Conditioning to anyone looking to replace or upgrade their HVAC equipment.”

Kenneth Williams

“Larson is always professional, thorough, prompt, and kind. He is accurate in his diagnoses and makes sure the customer understands what was wrong, what he did to fix it, and if there is anything you need to do after. Always happy with his work!”

Katie Purswell

“Love the way he explains everything thing to me. Polite, professional.”

Jennie Wallace

“Emergency call because our heat stopped working. Young man showed up in about 90 minutes went through and checked everything he could, and even though it wasn’t the best news because have a bad circuit board he was very professional, and courteous.”

Jim Weiger