Our Services
R.J. Olmen Company is a full service Commercial Ventilation Contracting Company, providing the following Installations and Services for their customers:
  • Plan & Spec Ventilation Systems
  • Commercial Boiler Modifications
  • HVAC Mechanical Renovations
  • General Contracting Mechanical Services
  • Geo Thermal Ventilation Systems Coordination


"RJO is what I call as the GO TO CONTRACTOR when it comes to HVAC. They charge a fair price for quality work. They always come through and you know you are dealing with a company that does the right thing." Rich Johnson - Tishman Construction / Chicago Public School

Please contact an R.J. Olmen Company representative for more details.