Welcome to Our World.

Chicagoland and Beyond.

We listen to predict your maintenance needs.

We respond with 24/7 emergency service.

We deliver the most professional service you will find in the Chicagoland area to keep your building problem-free, operating economically and energy efficient.

We provide:

  • Energy audits
  • Preventive maintenance programs
  • Retro-commissioning
  • LEED consulting
  • Fabrication
  • Solutions to all your HVAC needs


In healthcare, industrial, higher education and commercial, DePue mechanical installs, maintains and repairs your heating and cooling systems quickly and professionally.

Service Contractor Chicago Area

Service Project Gallery: