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

How often should I service my HVAC system?

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.

How often do I need to change my HVAC filter?

Your filter should be changed every one to three months, depending on conditions in your home and your region's climate.

Do you offer purchase financing?

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.

What are the advantages of a smart thermostat?

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.

What is a SEER2 Rating?

The SEER2 (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER2 rating, the more efficiently a unit operates. The SEER2 rating of any given unit can range anywhere from 13 to 21.

Bringing Comfort Home

With Expert AC Services

One Hour Heating & Air Conditioning® of Chattanooga

4.6

(142 reviews)

Heating & Air Conditioning

Services By One Hour

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HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in Chattanooga, TN

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.

We Have a Reputation

For Being Punctual, Friendly and Knowledgeable

4.6

(142 reviews)

David Higgins

07-09-2025

“Friendly, professional quick quote. Fair price. 2 day turnaround from quote to completion of work. Very appreciative. New ac unit is a much needed boost in mid-July. Thank you!”

Mikey Jones

07-07-2025

“If I could give more than 5 stars I would. To begin Luis is friendly, professional and honest. I previously went with Metro for my HVAC needs and they were constantly trying to upsell me, telling me since my coils were rusted I needed to replace my entire system for $13k. But Luis with one-hour was honest with me he said "no we can just replace the coil, everything else on your system is working". One-hour has made a life long customer out of me.”

Houston Webb

06-25-2025

“One Hour Heating & Air in Chattanooga has truly been a lifesaver. From the office staff to the technicians and management, everyone I've interacted with has been professional, hardworking, and committed to getting the job done right—and on time. Recently, I had the pleasure of working with Rick, one of their service technicians. He came out to repair my downstairs unit and not only resolved the issue quickly, but also went above and beyond by identifying and addressing a separate issue with my upstairs unit. Although I had only scheduled service for the downstairs system, Rick took the initiative to handle both problems in a single visit, saving me the hassle of multiple appointments. His attention to detail and proactive approach were much appreciated. I'm extremely thankful for the excellent service and highly recommend One Hour Heating & Air to anyone in need of HVAC support.”

Angie Scott

06-23-2025

“They arrived within 2 hours of my request for service! Rick was pleasant and knowledgeable. Once again, Danny and his crew came through! Thank you!”

Ed Bragg, Jr

06-13-2025

“I wish all HVAC companies were as courteous and professional. Rick did a great job and takes the time to do it right. Last year saved me hundreds of dollars by taking the time to troubleshoot and find a bad wire instead of replacing components. Absolutely recommend Rick and One Hour team!”

Marlin Larson

06-12-2025

“My local One Hour Hvac service provider is very professional and has great service. I’m especially impressed with Rick one of their technicians that is service me for several years. He finds good things to take care of for preventative of maintenance as well as just repairs.”

Peggy Williams

06-09-2025

“Wonderful Technician very honest ,knowledgeable and friendly, I have had 4 visits by other HCV technicians problems never solved,but finally found the issue. He took the time to find out the problem , explaining each step thank God for this Tech. I now have a permanent HEATING AND AIR COMPANY THAT I CAN DEPEND ON! I RECOMMEND Rick. Thank you again.”

Daryle Edmonds

06-08-2025

“I’ve needed the service of One Hour Heating & Air Conditioning on a couple of occasions. They have responded quickly and were very efficient. They were able to at least get the air running and informed me of what was still needed. I appreciate Rick’s help and timeliness. I highly recommend this company.”

Audrey McMillan

06-08-2025

“Rick was great! He responded quickly on a weekend, explained everything clearly, and fixed the issue with care and professionalism. I truly appreciate his honesty and excellent service. Highly recommend!”

Kristi Tankersley

06-05-2025

“Great service as always!”

HVAC Services You Can Count On

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

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.