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 Greenville

4.8

(1173 reviews)

Heating & Air Conditioning

Services By One Hour

View More Services

Two One Hour Heating & Air Conditioning technicians standing confidently in front of a service van.

HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in Greenville, SC

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 Knowledgable

4.8

(1173 reviews)

Kate Paluch

in the last week

“I've been a customer for I think we'll over 5 years now. I have their yearly service program too. They still impress me with their overall kindness and knowledge base. Each and every person I meet from this team has been super helpful, provided knowledge sharing and over all worked with me through the process. My relationship with this team started when we were out of town for the weekend (on the West Coast) and our air went out at the end of May (when it's getting hot where I live). Our sons and doggos were home in a 95 degree house and were stressed. I spoke to either Megan or Darlene (or both lol) and they reassured me and got JP right out. They made it easy for me to relax because of their communication and understanding. Since then we've been working with Dakota for our yearly service needs, he's so great even my parents use him and one hour now. Last week he realized that our over 10 year old system had a leak. He got Danno right out to assess it for us and we decided to replace it. Yesterday we worked with Noah and Daniel and I just can't stress enough how great everyone from one hour is. Both Noah and Daniel were extremely efficient as well as respectful. I had recently planted flowers and I didn't even have to ask Noah, he made sure nothing was trampled on me. He even put a little sign back on my unit for me without me asking. Super appreciative for everyone at One Hour. Great team and it shows! Thanks everyone!”

Jennifer Deal

a month ago

“3/19 - JP was wonderful! He was very thorough doing our initial inspection. He did a nice job explaining what he saw, how he completed the service and the recommendations he has for our system. JP even shared the photos of what he saw so I could share them with my husband. But best of all, he helped level our outdoor unit, something that has been a concern of ours for a while. 3/22 - JP came back today to install an OxyQuantum Remote complete system. The best part of the service was that he could fit this installation into his schedule while I was still on spring break. Looking forward to this helping us as we enter pollen season.”

Matthew Blouir

4 weeks ago

“They provided a free second opinion, and I paid to have a bit more diagnosis performed for peace of mind. JP was phenomenal and incredibly helpful. He arrived in less than 20 minutes and after a single follow up visit I had my answers. He did what another company and multiple employees could not across 5 visits. No pushy sales tactics—just a quality-driven expert. Because of this I will likely be swapping to One Hour once my current maintenance contract expires. Thank you JP!”

Jeff Smith

3 months ago

“I was forced to call very early in the morning in order to get on their schedule because my heat went out at 2am - One hour heating was out to my house before 9am and Michael did a great job. I really appreciate their response time. Their quickness allowed me to keep my work travel schedule and keep my home comfortable for my family. Very reasonably priced and I chose to sign up for their Maintenance plan. Highly recommend giving One hour heating a shot!”

Glenn Lonnquist

2 weeks ago

“Service Rep was able to come 1.5 hours early. I was contacted and agreed to change. There was one recommendation to replace capacitor that was at the low end of recommended range. I agreed. Part was replaced in about 10 minutes. Video was provided to show the part and explain it's purpose. And, to show the compressor, post cleaning. Service checklist was reviewed. I was satisfied with all aspects of the service check up.”

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, 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.

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.