Get matched with top nest installation pros in Carol Stream, IL

"Really well. The old one was removed and the new one installed in less than a hour."

"Superior craftsmanship on installing the new cabinets."

"They couldnâ  t fix it, but weâ  re willing to let me know who could and did everything they could to try to fix it before they said they couldnâ  t it had to do with my Well"

"Tom was prompt and thorough, and worked tirelessly to do a complete and excellent job. I was impressed both by the quality of his work and the speed with which he accomplished it. He actually did 3 different jobs for me, including installing an awning, repairing a pool and installing a new liner, and replacing 75 feet of discharge pipeline. He can do anything! I would highly recommend hiring him."

"​"The installation was excellent. The technician arrived on time, quickly diagnosed all the issues, and had everything resolved in under an hour. Highly recommended—I will definitely be using them for routine maintenance moving forward.""

"The new furnace and A/C were installed professionally and on time."

"Excellent service from start to finish! The AC installation was quick, professional, and everything was left clean. Richard was knowledgeable, friendly, and made the whole process easy. Highly recommend!"

At One Hour Heating & Air Conditioning, we've been proudly serving Chicago-area communities with expert heating and cooling services for over 65 years.\n\nOur reputation is built on delivering legendary service—with every technician fully background-checked, drug-tested, and bringing at least five years of professional HVAC experience to your home.\n\nYou, the customer, are the most important part of our business, and we never forget that.\n\nBe sure to ask about our flexible financing options—we're here to keep comfort within reach.

"Don came out & fixed the issue with the gas leak coming out of the furnace within 15 minutes. He then helped with my Nest thermostat that reset & wasn't turning back on. He was very courteous & knowledgeable."

At GENERATIONS HVAC our goal is simple: fix your system, not sell you a new one you don't need. We specialize in diagnosing and repairing heating and cooling equipment quickly, honestly, and at a fraction of what larger companies charge. \nAs a locally owned, family operated business, you're dealing directly with an experienced technician, not a commissioned salesperson. We take the time to explain what's actually wrong, what your options are, and what makes the most financial sense for you. \nIf replacement is truly the best option, we can handle that too, but only when its necessary. No pressure, no upselling, just straightforward service you can trust.