Reliable heating & cooling services for when it counts

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Covering the fox valley & surrounding area
Why McNally’s?
  • Honest, upfront, competitive pricing
  • 10-year limited labor warranty on installs, 2-year limited warranty on repairs
  • All work thoroughly tested
  • Professional, punctual and courteous service techs
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We represent the finest HVAC manufacturers in the industry, bringing you the best in technology, efficiency and reliability.

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Don’t just take our word for it...

I can't say enough good things about McNally's. I called them to get a quote for a new HVAC system for my house and they offered to come out that same day if I wanted.

After I received the quote (which was lower than the big box stores) I had several questions. I could e-mail them at 10PM and would get a reply within 15 minutes. They took the time to answer all my questions and were very flexible with my requests.

When the system was installed, they stayed until 7PM on a Friday night to get the job done. Even though they were working late, they took the time to make sure everything was installed neatly.

After the system was installed we found a manufacturing defect in one of the components, and they were out the next morning to take care of it.

Everyone at McNally's was wonderful to work with. Highly recommend!

Greg T.
St. Charles, IL

Terrific customer service - called these guys as they were subcontracted by Nicor under our service plan when leaks were found in the gas pipes and the furnace had to be turned off - yes while it was still @#$ cold. One of their guys by the name of "John" spent a good deal of time and trouble explaining to me that it would be worth my while to wait until the next day to call upon their service to avoid overages due to emergency rates. John and all his colleagues with whom I dealt were EXTREMELY pleasant, cordial and helpful, and I thanks to them I did not have to throw the table into the wood stove to stay alive.

Dominique S.
Geneva, IL