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Northwest Indiana's Full-Service Mechanical Contractor

Who We Are

We are a full-service mechanical (HVAC, Piping, Plumbing, & Service) contractor, fully licensed, bonded, and insured.  Since 1973, we have been established in the Northwest Indiana area and have handled projects large and small, all while maintaining the highest industry standards. 

No matter the job, our highly trained and experienced staff can handle it.  We are a union contractor and supporting member of the Sheet Metal & Air Conditioning National Association (SMACNA).  Our local union affiliations and state-certified apprenticeships mean our employees are highly trained and able to keep up with the latest training available.

We pride ourselves on being a woman-owned, family business that can adapt to any client’s needs, and we stand behind our work, which meets or exceeds industry standards. 

Specializing in Many Industries

Sheet Metal
Air Conditioning

Medical Gas

Design Build
Plumbing Service
Backflow Testing
Combustion Analyzing

TABB Certified Air and Water
Indoor Air Quality
Temperature Control
Building Automation

Circle R Mechanical is Fully Licensed, Bonded, & Insured

What We Do

We specialize in the installation of commercial, institutional, & industrial heating, ventilating, air conditioning, piping, and plumbing systems. We consistently complete jobs with the highest degree of customer satisfaction, all while remaining cost-efficient and competitive.

Our manufacturing facility includes a state-of-the-art duct coil line and plasma cutting table. This allows us to fabricate our ductwork & fittings in-house to maintain control over our project timelines. We have the capability to custom fabricate and preassemble all types of HVAC ductwork for a variety of projects.

We offer a full-service plumbing and HVAC service department including 24 hour emergency service.

Contact us to find out how we can help you with your HVAC, Piping, or Plumbing design, CAD, fabrication, installation, temperature control/building automation, service, or test and balance needs.

Metal Worker with Large Saw
Circle R Mechanical Inc Blower Install
Shop Floor of Circle R Mechanical Warehouse


From multi-million dollar installations to small retrofit work, Circle “R” Mechanical provides top-quality service and products to our commercial, institutional, and industrial clients. Our work can be found throughout Northwest Indiana and beyond.

We’ve applied our expertise and skill to projects throughout the area from large Healthcare and Educational clients to the homeowner in need of a water heater, furnace, or air conditioner repair.

Circle “R” Mechanical has been serving our clients since 1973. We have the knowledge, experience, and personnel to handle a wide range of projects. We look forward to remaining an industry leader and serving our clients in the ever-advancing mechanical field.