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...

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

We had our air ducts cleaned and sanitized by McNally's and the technician was on-time, friendly, polite and respected our home. He was on schedule in terms of the time estimation it took and overall it was a great experience. This was a very different from my last duct-cleaning a few years ago with one of those "" duct cleaning companies where I had a creepy tech who kept trying to upsell me and took twice as long as the estimated time. The previous company even scratched my hardwood floors - it was such a nightmare. McNally's is professional all the way around and I really appreciate the care they take when in our home!

Leah S.
St. Charles, IL