Hartwig Mechanical

About

Hartwig Mechanical is a commercial contracting firm specializing in plumbing, heating, air conditioning. For over 65 years, Hartwig Mechanical has helped businesses across Northern Illinois and Southern Wisconsin get more from their mechanical systems. As a full-scale contractor, we bring proven experience in new construction, design-build, renovations, and system upgrades. From commercial buildings to industrial infrastructure, we manage complex mechanical projects while focusing on performance, reliability, and lasting value. Our work is built to last, and our process is designed to meet the needs of the people who count on it every day.