Voted the Best Heating and Air Conditioning Company in Kane County

McNally’s Heating and Cooling has over 25 years experience serving St. Charles IL and the surrounding community. We are the repair, installation and maintenance partner of choice for Kane County residents and we’re available 24/7 to service the HVAC needs of our customers.

We are a Family Owned & Operated HVAC Company serving St. Charles and the Surrounding Area

For HVAC St Charles, there is no better company to call than McNally’s Heating and Cooling. We are an award winning provider serving the heating, air conditioning, maintenance, installation, repair, air purifying and emergency needs of our communities. We are committed to exceeding the expectations of our customers and are happy to be the go-to resource for HVAC and HVAC repair St Charles.

CURRENT PROMOTIONS

Why McNally’s?

Our Heating and Cooling Services

Heating

Maintaining high air quality and proper heating in your home is important for the health of you and your family. We are available for all repair, installation and maintenance of furnaces and humidifiers. We also service duct work and are available for duct cleaning

Air Conditioning

Chicago summers are HOT! Keep yourself and your family cool and reduce energy costs with efficiently running A/C. Air conditioning repair, installation and maintenance are all core services offered by our incredible McNally's team.

Installation

We are experienced in residential and commercial HVAC installations. Our work is always completed on time, with no unwelcome surprises. Installation services include air conditioning, furnaces, boilers, air purification and more.

Air Purifying

Keeping your indoor air free of bacteria, mold, dust and other particles is key to keeping your family breathing easy. We are available for air testing, dehumidifer maintenance, duct cleaning and sanitization, humidifer maintenance and more.

Maintenance

Save money and get quality service with the McNally's Pot of Gold Maintenance Agreement. Our maintenance customers get complete heating and cooling season tune-ups, discounts on parts, priority scheduling and exclusive warranty options on equipment.

Emergency

24/7 Emergency HVAC Service. HVAC equipment failures can create extreme discomfort for you and your loved ones. We're here to help in your times of need with lightning fast service.

Residential Heating and Cooling Services

McNally’s Heating and Cooling St Charles is a three time winner of the Angie’s list Super Service Award for our commitment to serving the needs of our customers. We were also voted 2021, 2022 & 2023 Best of the Fox for Heating and A/C Companies in Kane County.

Be it air conditioning repair, furnaces or even duct cleaning, our customers know that McNally’s means quality.

EMERGENCY SERVICE AVAILABLE 24/7

Day or Night, McNally's Heating and Cooling is Ready to Help!

There’s never a good time for an HVAC emergency. Whether it’s your furnace, air conditioning or anything else HVAC related, we always have emergency service technicians standing by and ready to help. 

Don’t just take our word for it…

Excellent
Based on 1541 reviews
Jeanette Chalhoub
Jeanette Chalhoub
November 29, 2023.
Repeat customer. Got a new HVAC/AC unit two years ago, and when we needed to change our first floor unit, I only called McNallys. Russ has worked with us both times. He is great and I would recommend!
Wincie Basten
Wincie Basten
November 29, 2023.
Angel was polite, professional and efficient. Even though I called at the last minute, Angel came to the rescue. He cleaned my furnace. And gradually, it went from 60 degrees to 70 degrees. Angel is an asset to your company. He was fantastic. Thanks to all of you for helping me with my "heating" issue. You guys are the best. I will be using you in the future.
Robyn Pettinato
Robyn Pettinato
November 29, 2023.
McNally's is the best! They installed my AC unit last summer and today they came to do a maintenance check on my furnace. The technician Brenden was great! He was very thorough and checked that everything was working as it should be. I renewed my maintenance agreement without hesitation because I will not go anywhere else now that I've seen the care that McNally's takes of their customers.
Marc Realie
Marc Realie
November 29, 2023.
Cory was great, answered all my questions.
Timothy Sheehan
Timothy Sheehan
November 28, 2023.
The after hours on call tech (Evan) came out immediately . Fixed the problem got heat back in our house. Because of him , McNallys will be our new HVAC provider!
John Shogren
John Shogren
November 28, 2023.
We needed a new furnace due to a crack in our furnaces heat exchanger. We went Costco and learned about McNally's. It was a no-brainer.. No one can beat McNally's and they offer solid customer Service from Sales to Installation to Service.
mike tillmans
mike tillmans
November 28, 2023.
Furnace went out Friday after Thanksgiving. Brendon fixed us up that night after a looong day.
Jonathan Havlik
Jonathan Havlik
November 25, 2023.
Recently during our annual tune-up, Esteban quickly noticed a crack that was emitting CO. Our furnace is only 6 years old so this unexpected issue caught us off guard. The entire McNallys team was extremely patient and explanatory as they helped us work through the issue. We ultimately decided to replace and upgrade our current system with a better one, and within four days, our new system was properly installed and working. The installation team was neat and efficient, I was so pleased. Thank you to Russ for helping us with the financial paperwork and rebates, he came to our home twice to make sure everything was in order, despite it being a holiday week. We look forward to continued work with McNallys and highly recommend them to anyone in the area.
Patrick F
Patrick F
November 24, 2023.
Excellent service by Kyle. Friendly, timely and thoroughly explained things. Highly recommend McNally’s and Kyle.
Randy Novak
Randy Novak
November 24, 2023.
Technician Kyle was great - on time, clear in his recommendation and very nice.
Awards & Accreditations

We're here to help you 24/7. If you need immediate assistance, call 630-363-9067.

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4.9 ⭐ Rating on Google with over 1000 Reviews!