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...

The folks at McNally's were true to their word. They showed up when they said they would, were conscientious, thorough, and fairly priced. Jon was personable and had our 2 air conditioning units humming in under an hour. If you are too hot or too cold I highly recommend McNally's.

Chris G.
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