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 Southeastern Wisconsin

4.82

(151629 reviews)

Heating & Air Conditioning

Services By One Hour

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

Heating, AC & Furnace Repairs in Mount Pleasant, WI

100% Satisfaction Guaranteed

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

4.82

(151629 reviews)

Lorraine R Savage

in the last week

“Bailey was very professional, he explained everything so I could understand it. He went above and beyond to make sure everything was working right and even got me a same day appointment for my AC unit. I would hardly recommend him for anybody needing this kind of repairs. Thank you so much.”

Pam Cinadr

in the last week

“Eli was friendly, very knowledgeable and quickly corrected the situation. It was a simple concern that someone at a call center could have given me suggestions and saved him a trip and me $79.”

Jen Fleming

in the last week

“Our furnace wasn't heating the house at all. Even though we're not far from nicer weather, it still was an artic feeling temperature in the house of 58°. Not having a relationship established with a company for major home services makes emergency type situations extremely stressful and a little scary to be honest! I picked a couple different companies that did service in our area and looked at customer reviews and sent a message to 3. Northern One Hour Heating and Air Conditioning was the first to respond. The person I then received a call from was impressive with the attention given to how I was feeling matching what I was saying and responded accordingly. Erin was the technician to come and was here in in less than 2 hours. She was professional, knowledgeable, and wonderful to deal with. She was thorough and took the extra time to explain everything and answered all of my questions. Erin found the issue and had everything up and running in no time. Even with it being a pretty basic fix, she didn't cut corners and gave attention to detail which overall left me feeling comfortable and confident in my choice to use Northern One Hour. I would absolutely recommend them to anyone and will continue to use them moving forward. I'm relieved to know I now have my "go to" for everything HVAC! You're awesome Erin and thank you again for everything!!”

Gil jv

in the last week

“Not just professional but the human touch makes Joshua a great service provider. I am very happy on how he was able to walk me through the situation and options to get the job done. Thanks.”

Matthew M

in the last week

“John was a great tech. He explained everything and checked every part of our AC to ensure it was running properly. He was able to find our issue (that was nearly impossible to find). Definitely recommend John and One Hour Air Conditioning and Heating of Niceville.”

Jimmy Lollar

in the last week

“One Hour Air is the best! Ze came and did our regular check-up. All of the folks at One Hour are more than capable and know their business. The front office staff does an excellent job at communicating with their customer base. I love being able to schedule appointments and communicate with them for any reason by text. Thanks, Ze for doing a great job and advising us on greater ways to improve our HVAC efficiency. We've already implemented your first recommendation and we're looking into our options for implementing the other!”

Julia D

in the last week

“I love One Hour Heating! I had my furnace replaced by them a year ago and now I have their membership. They called me yesterday about my annual tune up for my furnace and were able to schedule an appointment for today. They are always on time and their technicians are wonderful! Troy was kind, helpful and gave me some great advice to keep my furnace and humidifier running efficiently and safely! I highly recommend. ⭐️⭐️⭐️⭐️⭐️”

Ataur Goni Polash

in the last week

“I am absolutely thrilled with the exceptional service I received from One Hour Heating and Air Conditioning Company! Last summer, Ali from One Hour Heating and Air Conditioning installed a new AC unit at my home, and he did an outstanding job. His professionalism, attention to detail, and courtesy left a lasting impression. This winter, I faced a nightmare with my furnace, which was poorly installed by another company. However, when I called Joe at One Hour Heating and Air Conditioning to install a new humidifier, he sent Ali to my rescue once again! Not only did Ali install the humidifier with precision and care, but he also took the initiative to fix the botched furnace installation from the previous company. His expertise and dedication are truly commendable! I must also praise Joe for his exceptional customer service. He consistently provides competitive pricing and ensures that his team delivers top-notch work. The combination of Ali's technical expertise and Joe's customer-centric approach makes One Hour Heating and Air Conditioning the go-to choice for all my HVAC needs. I highly recommend them to anyone seeking reliable, efficient, and affordable heating and cooling solutions! Kudos to Ali and Joe for an outstanding job!”

Terrye Howell

in the last week

“I had the pleasure to have Willie O. And Champion C. as my technicians. They were very professional, patient, personable, knowledgeable, and helpful. It was a nice experience. I have always had good technicians from One Hour Air. Thank you for giving me a nice experience every time.”

Eddie Willis III

in the last week

“Excellent and Courteous Service! Fernando just came by and confirmed that the inducer is bad as well. I really appreciate the prompt and courteous service from Joe throughout this process. Looking forward to hearing back soon. I'm not in the market for a new furnace, so I truly appreciate any options they can provide. Great service overall!”

Special Offers

Mention at time of service

$49 Furnace or A/C Tune-Up
$500 off Furnace & A/C Replacement
50% Off 1st Year Club Membership

$19.99/month following the first year

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, we'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 StraightForwardPricing® 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.