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.

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 1675 reviews
Ramona Sanzeri
Ramona Sanzeri
May 2, 2024.
My husband and I have complete trust in McNally’s. They’ve been servicing our AC and furnace for a few years and when we recently needed both replaced, Craig was very helpful and attentive. I didn’t even shop around because this is a company I trust. Jeff and the guys doing the installation were professional and left my home clean. Just a very nice experience!
Kevin McDunn
Kevin McDunn
April 30, 2024.
I just purchased a new, high-efficiency (99.5% AFUE, 22 SEER) dual-fuel furnace and heat pump system. My experience was excellent throughout—from Craig's detailed consultation and proposal process (he's a former HVAC business owner himself) to Eddie McNally ensuring the system was designed properly for my home to Jeff and Manny, who installed and commissioned the system with care and treated my home as if it were their own. The Costco promotion helped make this deal very attractive. I have high confidence in McNally's and recommend them to anyone in the market for enhanced air comfort.
Michelle Keenon
Michelle Keenon
April 30, 2024.
I can’t speak highly enough about Jimmy at McNally’s coming to work on my air conditioner today. I had such horrible experience with Precision last week that I needed a second opinion and things fixed that were messed up by the other company. Jimmy was friendly, efficient, clear in explaining, not pushy at all in the choices I needed to make, and fair in pricing. I will be a repeat customer.
Larry Witzigreuter
Larry Witzigreuter
April 29, 2024.
Esteban was phenomenal. He is so knowledgeable about hvac systems it is amazing. Not only did he service our furnace, but because we were having issues with a lot of dust in the house, he pointed out 3 changes that would help improve our dust issue. We also have a UV air purifier that we could not use because it was originally installed too close to the air filter and was burning a hole in the filter so we had it unplugged. He re-installed the UV air purifier to a better location, so we could continue to use it. I will continue to request Esteban for our maintenance. Great lead service technician. If I could I would give him more than 5 stars….
Neil Seguin
Neil Seguin
April 25, 2024.
Cory was friendly, professional and really helpful on our spring HVAC check up
Jan Moore
Jan Moore
April 25, 2024.
Technician Angel is the best!
Ken Gustafson
Ken Gustafson
April 25, 2024.
High quality products and professional service technicians. Our service techniciansJimmy is always knowledgeable and friendly while doing our maintenance in the spring on our air conditioning system and in the fall on our furnace.
Pat Weiler
Pat Weiler
April 24, 2024.
Cory was amazing. He explained everything very clearly. He called me through recommendations.
Dion Charles
Dion Charles
April 24, 2024.
We decided to replace our old HVAC system because we wanted to refinish our basement, and the old system was taking up valuable space. Despite functioning well, it was inefficient and needed to be relocated. We found McNally's through Costco, and our Comfort Advisor, Russ D, impressed us with his technical expertise and experience. He explained the various solutions available to us, helped us understand available rebate and tax credit programs, and was with us throughout the sales process. On the day of installation, Jeff and the McNally's team arrived promptly and showed great respect for our home. They were well-prepared, having taken thorough notes and brought all the necessary equipment, tools, parts, etc. Jeff's regular updates and encouragement to ask questions kept us informed and engaged. The two-day installation process was managed efficiently, with the team cleaning up after day one and returning on day two to complete the job. The attention to detail and professionalism of the McNally's team was impressive. We are 100% satisfied with our new HVAC system and want to thank Russ and the entire McNally's team for their exceptional work. We highly recommend McNally's to anyone in need of HVAC services. Again, thank you to the entire McNally’s Hating & Cooling team!
Michael Boland
Michael Boland
April 23, 2024.
First class customer service. They don't just make a sale and forget about you, they truly care about the work done and do right by the customer. Wouldn't go anywhere else.
Awards & Accreditations

Geneva

Wheaton

Glen Ellyn

Naperville

West Chicago

Elburn

Sugar Grove

Lisle

South Elgin

North Aurora

Aurora

Warrenville

Proudly Serving

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Winfield, IL
Wood Dale, IL
Woodridge, IL
Yorkville, IL

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!