Keystone Htg & AC Co, Inc

Keystone Heating & AC Co, Inc has kept Racine and Kenosha residents comfortable since 1918, making it one of Wisconsin's oldest continuously operating HVAC contractors. The company holds license #1530758 and maintains a 4.9-star rating across 203 customer reviews, with around-the-clock availability every day of the week. Operating from offices at 2707 Durand Ave in Racine and 124th St. in Union Grove, the company employs technicians who service equipment from major manufacturers including Rheem, Lennox, Bryant, Trane, and Carrier.

What distinguishes Keystone from newer competitors is its century-plus track record combined with modern technical capabilities. The company serves as an authorized Lennox and Rheem dealer, installing furnaces, air conditioners, boilers, and mini-split systems from these manufacturers. Beyond standard heating and cooling, they address indoor air quality through humidifiers, dehumidifiers, ventilation systems, and air filtration. Their financing program makes energy-efficient system upgrades more accessible, while their 24/7 emergency line ensures customers never face a heating or cooling crisis without support.

Customer reviews reveal a pattern of technicians going the extra mile. When Chad B.'s furnace failed during frigid weather, another company charged $100 for a misdiagnosis that left his family in a house dropping to the upper 30s. Andrew from Keystone arrived within three hours, thoroughly tested every switch and safety device, traced the wiring harness, and found a bad connection that previous technicians missed. Another reviewer, J S., had a persistent banging noise from vent expansion that went unaddressed by his previous HVAC company for a week. Adam from Keystone identified the problem immediately upon arrival.