Professional, Cost-Effective Control Systems Solutions
Since 1985, we have built a first class reputation
based on quick response and professionalism.
A Union Mechanical Contractor Provider
Korellis Systems Control is a union mechanical contractor serving many school districts, churches and other commercial buildings in and around Chicagoland.
Since 1985, we have built a first class reputation based on quick response, professionalism, and honest, hardworking, respectful service. Our customers know that we have the expertise, experience and knowledge to get them up and running with the simplest, most affordable solutions.
In over 20 years of business, we have never had a school or church close because they had no heat.