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 Bristol

4.9

(559 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 Bristol, CT

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

4.9

(559 reviews)

Jennifer Cohen

03-14-2025

“Great experience again!”

John Beckwith

03-10-2025

“We had an issue with our furnace. The tech Tim Wood diagnosed the problem immediately and fixed it in two hours. I’m very happy with that experience.”

A Rued

03-08-2025

“I've had them for 10 years since I own the whole month. And every time they are excellent.”

Chelle Miklos

02-17-2025

“John is informative and friendly.”

Dan Dempsey

02-13-2025

“Fast , professional, and exceptionally friendly!!!”

Bob Cobb

02-04-2025

“These guys are great. Obvious experts, professional, friendly and courteous. They work clean and neat and protect the rest of my home from the mess off demolition/construction. Really recommend One Hour and Tim!!”

Annah Em

01-31-2025

“Our furnace stopped working all of a sudden, at 4 AM on a Saturday morning. I spent half the morning calling dozens of companies trying to find someone to come out same day and do a furnace repair. After calling about 11 different companies, I stumbled upon one hour heating and air conditioning and they told me they will come out as soon as they can and it’ll be the same day before 9 PM which was very relieving because everyone else was just like we don’t have any technicians available or call back Monday. I called around 11 AM and they told me that someone would be out before 9 PM, however, shortly within the next three hours they sent a beautiful man named Rick to my house and he was definitely an angel in disguise after fixing our furnace and helping us spend a little less than we’d imagine he then offered us $100 coupon which really was a blessing for us. I will definitely use this service again. Rick was so nice and professional. Everyone was amazing and I’d recommend them 100 times.”

Enrique Bello

01-30-2025

“I had an excellent experience with this company. The technician, Reinaldo, arrived at my door just an hour after I called, which was impressive. He was incredibly knowledgeable and took the time to share valuable tips on how to properly maintain my HVAC system. It’s clear that this company is run with integrity—they’re honest, efficient, and not out to overcharge or take advantage of customers. I highly recommend them to anyone in need of reliable HVAC service!”

Charles Pond

01-29-2025

“Nathan was great, took care of problem, very articulate efficient at his work. Nice job.”

Special Offers

Mention at time of service

$79.00 Pre-Season Performance Check w Our Breakdown Free Guarantee!

Includes an inspection and safety check of 1 A/C system OR 1 Gas Heating Unit

This special offer includes our breakdown free guarantee for the rest of the 2025 season - if you do have a breakdown this season the cost of the performance check will be applied to the cost of the repair. Excludes oil heating units and mini splits. Residential only please.

Expires: 2025-04-30
$100.00 Off

Any HVAC Repair

Expires: 2025-04-15

License: #S-1 303469
Now Offering Duct Sealing & Duct Cleaning!

Take efficiency and air quality to the next level in your home!

No Obligation quotes for duct sealing and duct cleaning! Lic. #S1-303469

Expires: 2025-04-30
Free Same Day Second Opinion on New Equipment Installs

Want to make sure your quote for install is fair ?

Same day does not apply during weather events or delay due to customer or access to the property.

Expires: 2025-04-30
Need A/C or Heat?

Free no obligation estimate to install heating and/or A/C

ASK US ABOUT THE CURRENT REBATES AVAILABLE IN CONNECTICUT AND FINANCE OFFERS! Lic. #S1-303469

License: #S-1 303469
Zero Down & Zero Interest with 12 Months Financing

LIMITED Time Offer on our Premier and Optimum systems.

Available for our Premier & Optimum systems on approved credit. Loan would be provided by Synchrony. Repayment terms and promotional periods may vary.

Expires: 2025-04-30
Free MicroPower Guard and/or Air Scrubber with New Heating & Air Conditioning Equipment Install

Have cleaner & healthier air with your new equipment!

Call today to schedule a no obligation quote! Offer valid with a new heating & air conditioning system. L# S1-303469

Expires: 2025-04-30
10% Military Discount

Thank you for your service!

Active duty military personnel, veterans and immediate families are eligible for a 10% discount on our standard rates. This offer is for Non Club customers only.
10% Senior Discount

Price Conscious seniors can take 10% off our standard rate repair when you mention this add! Discount Valid for those 65 & older. This offer is for our Non Club customers only.

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 local community. 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.