DePue Mechanical, Inc.

DePue Mechanical, Inc. DePue Mechanical: industrial and commercial contracting services. Follow for insights and updates. DePue Mechanical, Inc.

is a full-service industrial mechanical contractor based in Minooka, Illinois. We help manufacturers, plants, and facility teams reduce downtime and keep critical systems running through expert mechanical construction and service. Our capabilities include industrial and process piping, commercial and industrial HVAC service and maintenance, boiler installation and code welding, fabrication support

, and planned outage/shutdown assistance. Whether you need a dependable partner for ongoing maintenance or fast response for urgent repairs, our team brings safety-first execution, clear communication, and high-quality workmanship to every job.

Not every solution starts with a perfect set of drawings.Sometimes it starts with a problem, a budget, a lot of coordina...
09/02/2026

Not every solution starts with a perfect set of drawings.

Sometimes it starts with a problem, a budget, a lot of coordination, and a crew that knows how to make the pieces work together.

That was the challenge here.

The customer was dealing with a negative air situation in the warehouse caused by ovens, exhaust fans, and a large spray booth exhaust. At the same time, they wanted to bring some cooling into the plant without blowing up the budget.

After multiple revisions, our team worked through a plan that balanced airflow, cooling, distribution, and cost.

The solution included a 60,000 CFM make-up air unit with a direct-fired burner to replace the air being exhausted from the facility, along with seven 20-ton rooftop units providing 140 tons of cooling.

The goal wasn’t to turn the production floor into an office.

It was to pull out some humidity, bring the temperature down from the 90s, and make working conditions more manageable during the summer.

From there, coordination mattered.

We worked with Litgen to pour new equipment pads, set the equipment, and plan the duct distribution. With no formal prints or engineered duct layout to follow, our internal team worked through the routing and gave the customer as much air distribution as possible while staying within budget.

In fact, our sheet metal crew was able to provide even more distribution than originally anticipated.

The remaining work includes running a new gas feed from the meter to the make-up air unit and tying into existing high-pressure gas lines for the rooftop units.

Sometimes the job isn’t about getting a space to 72 degrees.

Sometimes it’s about making a 90+ degree production plant a whole lot more bearable.

This is the kind of project that shows what mechanical contracting really looks like in the field.

Happy   from the newest member of the team, Obi-Wan! 🐾Obi may still be learning the ropes around here, but he already kn...
08/26/2026

Happy from the newest member of the team, Obi-Wan! 🐾

Obi may still be learning the ropes around here, but he already knows one of the most important rules on the job: always wear your PPE. 🦺🐶

Stay safe out there, and give your four-legged coworkers some extra love today!

40 feet below grade, stainless steel ductwork, explosion-proof equipment, and a pair of 500-pound axial fans.That was pa...
08/18/2026

40 feet below grade, stainless steel ductwork, explosion-proof equipment, and a pair of 500-pound axial fans.

That was part of our scope at IDOT Pump Station 49 in Barrington, IL.

We installed dedicated fresh-air intake and exhaust systems serving both the wet well and dry well, each extending approximately 40 feet below grade.

The wet well required 316 stainless steel ductwork, while the dry well utilized galvanized ductwork. Our scope also included exterior louvers, dampers with explosion-proof motors, and explosion-proof electric unit heaters in both well areas.

On the first floor, we installed a ductless AC split system and an electric unit heater serving the electrical room.

The wet well ventilation system included two 39-inch-diameter, 500-pound vertical axial fans. Because the fans were too large to fit through the finished doorway, we had them delivered and staged inside the pump station before the roof and door frames were set.

From brownfield conditions to final installation, the photos show the project at each stage — including the ductwork installation and the completed systems.

This was a specialized HVAC installation built around the conditions and requirements of the facility.

We’re proud of the work our crew completed at Pump Station 49 and proud to have played a part in this IDOT infrastructure project.

This pigment injection system started long before anything was bolted into place.Our team assisted with the layout and d...
08/14/2026

This pigment injection system started long before anything was bolted into place.

Our team assisted with the layout and design of a new system built to inject color into manufactured caulk. That meant coordinating high-pressure pumps, pigment-injection equipment, static mixers, piping, connection points, and final distribution to the customer’s equipment.

During preconstruction, our team developed detailed layout drawings showing how the entire system would come together. Those drawings gave our fabrication and field teams a clear plan for the pigment skid, piping routes, equipment connections, and installation sequence before the work reached the jobsite.

From there, the project moved through:

• Layout and design coordination
• In-house shop fabrication
• Equipment and piping integration
• Final field installation

The static mixers help blend the pigment and caulk evenly, while the pumps and distribution piping move the material where it needs to go.

Swipe through to see the progression from the original DePue-generated layout drawings to prefabrication in our in-house fab shop and, finally, the completed installation.

That is the value of planning the work before working the plan.

Better coordination. Fewer field surprises. A system designed, fabricated, and installed with the full picture in mind.

With barely enough room for the forklift to maneuver, we knew this one was going to take more than muscle. It took a cle...
08/11/2026

With barely enough room for the forklift to maneuver, we knew this one was going to take more than muscle. It took a clear plan, constant communication, and a crew that knew how to adjust without losing focus.

Jobs like this test a team’s agility and trust.

In true DePue fashion, our crew communicated, worked together, and got the units where they needed to go.

Not every install gives you room to breathe. That’s when teamwork matters most.

Stick around for more from this project in Streator, IL. Next, our team will head inside to install the ductwork connecting the facility to these new outdoor units.
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Not every update needs to show the finished product.Our crew is fabricating process piping for a dry-mill ethanol facili...
08/05/2026

Not every update needs to show the finished product.

Our crew is fabricating process piping for a dry-mill ethanol facility out in Hennepin, IL. That means measuring, fitting, welding, checking, and making sure every connection is built the way it needs to be.

It is the kind of day-to-day work that usually happens behind the scenes, but it is what keeps the larger project moving forward.

The finished system may be what people notice in the end. This is the work it takes to get there.

At a specialty food plant in Channahon, our team removed two aging steam boosters and installed their replacements.These...
08/03/2026

At a specialty food plant in Channahon, our team removed two aging steam boosters and installed their replacements.

These units play an important role in keeping the plant's steam system delivering the pressure needed for critical production processes. In a food facility, reliable steam can support everything from process heating and cooking to sanitation and temperature control.

Getting this replacement done right took more than moving equipment from Point A to Point B. It required careful planning, coordinated rigging, experienced mechanical hands, and a crew that understood the importance of getting the plant back online.

That is the kind of reliability we work to bring to every facility: plan the work, communicate clearly, execute safely, and keep production needs front and center.

🚨PROJECT UPDATE🚨The mechanical side of IVCC’s new Agricultural Education Center is starting to look a lot more like a fi...
07/27/2026

🚨PROJECT UPDATE🚨

The mechanical side of IVCC’s new Agricultural Education Center is starting to look a lot more like a finished system.

Since our first update, our Sheet Metal and HVAC Service crews have installed a significant amount of ductwork and set the outdoor condensing units for the VRF system.

Those units will serve the different offices, classrooms, and support spaces throughout the building. That zone-by-zone setup allows each area to receive the heating or cooling it needs instead of treating the entire building like one big room.

Inside the main classroom, our crew is finishing a large section of exposed ductwork. Since it will remain visible in the completed space, the duct will be painted black to blend with the ceiling and become part of the room’s finished look.

Exposed duct leaves a little less room for “good enough.” The routing, transitions, hangers, and connections all need to perform correctly—and look clean when the lifts and ladders are gone.

There is still work ahead, but the equipment is being set, the duct system is taking shape, and the building is one step closer to serving IVCC’s students.

Good progress alongside Vissering Construction Company.
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Our team was back at the power generation plant in Elwood, IL, for an emergency pipe support repair that called for cran...
07/21/2026

Our team was back at the power generation plant in Elwood, IL, for an emergency pipe support repair that called for crane work, field welding, and a good amount of coordination around existing plant conditions.

Pipe supports are not just “extra steel.” They carry heavy loads, control movement, and help keep piping systems where they need to be. When one needs repair, the work has to be planned and handled safely from the first pick to the final weld.

For this job, our team completed welding repairs on the supports, then we had our friends over at Stevenson Crane Service, Inc. assist us with the heavy lifting.

This is how our field work shows up: tight access, heavy picks, hot work, and plenty of coordination.
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Address

113 S. Ridge Road
Minooka, IL
60447

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 4pm

Telephone

+18152552500

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