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 SEER Rating?

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.

Bringing Comfort Home

With Expert AC Services

One Hour Heating & Air Conditioning® of Chattanooga

4.7

(120 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

4.7

(120 reviews)

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!”

Richard Payne

06-05-2025

“Rick is awsome ,got us cooled down in a hurry ,said what they were going to do then did what they said at a fair price.”

Chance Young

06-04-2025

“Rick came out to my house, found the issue right away. Very respectful and if I have a problem again I’ll be asking for him.”

Durell Hamilton

06-03-2025

“Rick, did an awesome job! Kind, knowledgeable and efficient!”

Heather Flaherty

06-02-2025

“Couldn't be more grateful for this company! After many months of dealing with temperature regulation problems and lack of air flow throughout our home, One Hour came out and immediately saw where our issues were and what needed to be done to correct them. They got started immediately, they finished in the proposed amount of time, and they even cleaned up after themselves. They were extremely professional and patient throughout the entire process. Thank you for finally making our home feel like a HOME!”

JL Cooper

05-30-2025

“This is about Rick Skelton. This is by far one of the best service people I have ever gotten a chance to encounter. Rick came out on behalf of One Hour Heat and air here in Chattanooga. He was not only courteous and friendly, but very, very very thorough. He is the service manager for this company. I highly recommend if you have to call the company, that you ask for Rick. So pleasant to work with, talk to, and be around. He is a professional of the highest standard in HVAC service work.”

Ben Ingvalson

05-28-2025

“GREAT SERVICE!!! I had to have my whole HVAC system replaced. One Hour made a normally painful experience almost pain free! From their office manager, Comfort Specialists, to their install techs, they could not have been more friendly, prompt, and professional. Install was quick and clean. Financing was very easy. Couldn’t ask for better service. If you have HVAC needs, call the Yellow Fellows!!”

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.