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

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 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.

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.

We aim to please

Once you work with McNally’s, you’ll be a customer for life. For heating, air conditioning, air purification and emergency service, we lead the field in quality, reliability, and pricing. Thank you for your business and your trust.

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.

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