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 Shelton

4.6

(52 reviews)

Heating & Air Conditioning

Services By One Hour

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HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in Shelton, 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 Knowledgeable

4.6

(52 reviews)

Grace DeSanti

03-21-2025

“Called for emergency service and they sent out a technician right away. Provided kind, fast, and professional service to my central air unit.”

Kathleen Pekera

07-05-2024

“Excellent!!! On a holiday weekend when it’s 85 outside and my 2nd floor AC was not working … they called me back promptly and within the hour Gary was fixing the problem! 5 star service! Highly recommend them.”

Frank Strassburger

06-21-2024

“Thanks for your prompt service. Much appreciated Ralph”

Robert R

05-24-2024

“Could not be any happier, two homes fixed and always answer in emergencies. Love them.”

Ray Lansing

03-07-2024

“Outstanding job. I was looking to replace my old A/C with a heat pump which could help with heating too. Ralph and his team at One Hour were able to do what I was hoping for, add the heat pump for A/C and heat, plus keep my working furnace when it gets really cold. Knowledgeable, professional and courteous all around. Highly recommend!”

parker quinn

04-02-2023

“We love Norman!! He was incredibly kind, had a great attitude and walked us through what was wrong with our furnace!”

John Girard

09-27-2022

“I was very pleased with the service I received from a technician named Norman. We both had a lot to talk about and learned from each other. I purchased a wise thermostat and wanted assistance to get it installed. He did a great job on that in addition to providing a thorough test of my furnace.”

Dave Grant

09-23-2022

“Have been using this company for a few years now. From Joanne on the phone to all the rest of the guys and Ralph the owner, nothing but professional service. Thanks, Dave Grant Sr”

Amy Decker

09-14-2022

“My husband and I had a terrific experience with this HVAC company. Everyone on the staff was kind and courteous and respectful - from the "director of first impressions" (gal on the phone when you call) to all the different techs that came out. They all wore shoe covers and cleaned up completely when they were done. Our job went on for a long time but only due to supply-chain problems and even then they kept us posted the whole time which was very appreciated. We had several contractors come out to give us estimates on this installation but the owner of this company is the only person that told us about government assistance loans we could apply for. So a big thank you from Amy & Bill to you all! We would definitely recommend this local company. *Edit* My first review was for the install and service we received. Now I want to tell people about the product we bought - mini split heat pumps. Wow! If you are considering getting these - do it! Now that we are on our second summer with these, I don't know why we didn't do it sooner! The cooling and dehumidifying is supreme. And getting rid of (selling!) all our window units was a dream. No more lugging them into the attic and then bringing them down again. Highly recommend the company and the product.”

Bill Bridges

08-01-2022

“I have a been a loyal customer and their response time to my needs have been phenomenal. From the front desk to the technicians they provide complete transparency into all the work that needed to be done. Not once did I feel like I was being overcharged and I was always educated on what was needed and how to maintain the units going forward. I regret not being on their customer program because it would have saved me even more money.”

Special Offers

Mention these discounts at time of service

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$25 Off

Any Repair

Can not be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply.
10% Off Any Repair Service

Veterans and Senior Citizens

Can not be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply.

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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.