Minnich Mechanical Design

Boiler, Piping, Controls, and Radiant Heat Specialists. All of our jobs are expertly designed before we pick up a tool. Minnich Mechanical Design offers the very best in HVAC service, design,
and installations; specializing in radiant heating sytems.

For over 30 years, Steve has provided exceptional service to the HVAC industry by being an educator at the college level, providing nationwide HVAC technical support, and being an HVAC business owner for 20 plus years.

Operating as usual


Whatever you do, at work or at home, do it well.


One beat up old man.
One rain soaked day.
One less shed.


500 followers! Wow! No gimmicks. No giveaways. Just pictures of our work.


- My girls. 1993ish


Icing all “moving” parts today hoping they’ll move tomorrow.


Combining the bathroom zones into 1 zone on this boiler room upgrade allowed me to take the buffer tank out of the design, lowering the cost and avoiding short cycling issues.


I think I have to fire my PR guy. He’s getting ornery in his old age. 😂


High efficiency boilers, sophisticated controls, piping, radiant everything, old school cast iron radiators, expert design, solving problems on boilers that others just can't, award winning installations, along with 38 years of experience on hydronic systems.


- From about 20 years ago when I installed Burnham Baseray 9A cast iron baseboard in a huge home in Hinsdale. The other 20% was radiant.


She's ready to be hung on the boiler room wall. I used all 67" I had to work with. No more pics of this one until I install the boiler. I promise.


Got a chance to spend some more time on the pre-piped board this afternoon. I’m getting closer. Plan on pre-wiring as well. #pipefitter#boilerguy


One before MMD picture and two of beginning of the after MMD pictures.


From a great customer - “I told my business partner we need to go ahead with the boiler replacements at the apartment building because Steve is pretty beat up and isn’t getting any younger. If something happens to him, we’re screwed.”

Me - 😳😳😳😳😂😂😂😂


When an inspector pretends like he understands what I just did. 😂


Did I mention I make really cool furniture too?


Penny and Stacey visited today! I love being a grandpa!!!


Nobody should have any trouble finding our door now. Big shout out to Ciccotelli Signs in New Lenox! They do incredible work!


Despite tripping all over myself this afternoon, I got this LP fired Lochinvar Knight torn down, cleaned, and dialed in with my Testo 320 combustion analyzer.

Every day can’t be smooth as silk.


These are pictures of an HTP Munchkin boiler heat exchanger, before and after I cleaned it.

If you have a modulating condensing boiler, it needs to be serviced by a competent company that knows boilers.


"The time is always right to do what is right." MLK


Minnich Mechanical Design's cover photo


I just got my new van lettered and could not be happier!


I’ve been called Sir or Mr. Minnich 4 times in the last 3 days. Each time I looked around to see if my dad was there.

My name is Steve.

Steve Minnich.


My kind of town...Chicago is. Imagine McCormick Place being FILLED up completely with the latest and greatest in the world of HVAC. It happens every few years in our town and it's happening next week with the 2018 AHR Expo. #thatsme


We just reached 300 followers on Instagram! Give us a look and follow to see how we're getting things done.


Work is no longer what I do.

It’s all I do.

This is not an ideal climate to be a 1 man heating company.

Still love it though.


TBT - Replacing a B&G Series 60 pump in the Washington Park neighborhood on Chicago’s south side.


We’re almost there. Another big assist from the Eggman today.


It’s what we do.


My cold weather flux is frozen.


Most people hate their job or, at least, barely tolerate it.

Not me. I love what I do. Quitting college 37 years ago was one of the smartest things I’ve ever done. Go figure.


Heading back to work shortly. Ain’t no rest for the wicked.


When the working never stops, I just look at this video 3-4 times a day and everything is cool.


Shout out to Mark "Eggman" Egge for the big assist on today's job. He saved me a ton of steps and energy which allowed me to focus on my thing. Thanks again, Mark.



Check out the start of this video series on our company, sponsored by Lochinvar Boiler and produced by mechanical-hub.com.


While most of corporate America takes the week off between Christmas & New Year's, much love to the guys that work tirelessly to bring heat to those who need it, like, right now, especially in these temps. We are onsite today with Minnich Mechanical Design on a boiler changeout. Check out part 1.

Videos (show all)

When the working never stops, I just look at this video 3-4 times a day and everything is cool.
I'm not all work.I'm also the loving-est grandpa ever. Just ask me.
If you think you're having a bad day, it could be worse. You could be this old house. It's Friday. It's great to be aliv...



120 Easy Street, Unit 12
Carol Stream, IL

Other Heating, ventilating & air conditioning in Carol Stream (show all)
Precision Today Precision Today
300 Commonwealth Dr
Carol Stream, 60188

$50 off Way Low Wednesdays

Chappels Heating, Cooling and Home Performance Chappels Heating, Cooling and Home Performance
470 Mission St Unit 12
Carol Stream, 60188

Chappel’s Heating & Cooling is an Illinois Heating, Cooling and Air Conditioning service and replacement company. Chappel’s provides Home Performance Diagnostic and repair service and equipment replacement and upgrade.

Rankin Group Rankin Group
288 S. Westgate Drive
Carol Stream, 60188

Rankin has been a leader in temporary climate solutions since 1981. Our commitment to our clients and personalized service is what has allowed us to shine.

AWAC Heating and Cooling AWAC Heating and Cooling
Carol Stream

Istalacion y reparacion de aire acondicionado y calefaccion

AllStar Heating & Cooling Corp. AllStar Heating & Cooling Corp.
120 Easy St, Ste 15
Carol Stream, 60188

Serving the Chicagoland for over 25 years.

Elite Heating and Cooling Elite Heating and Cooling
890 Somerset Dr
Carol Stream, 60188

We service all makes and models of furnaces, boilers, air conditioners, and heat pumps

Airmaker, Inc. Airmaker, Inc.
26W368 MacArthur Ave
Carol Stream, 60188

Quality Heating, Ventilating, and Air Conditioning products and services for the Chicago area.

Shamrock Heating & Air Conditioning Shamrock Heating & Air Conditioning
190 Easy St
Carol Stream, 60188

Your comfort is our business with family tradition since 1971

Elite Air Inc. Elite Air Inc.
155 Easy St
Carol Stream, 60188

Big enough to handle all of your Heating and Cooling needs, Small enough to Care!

Mr.Heat - Heating & Air Mr.Heat - Heating & Air
Bradbury Circle
Carol Stream, 60188

Professional and trustworthy HVAC contractor. Residential and small commercial HVAC service and installation. Great prices!

AWE Air Water Energy AWE Air Water Energy
295 Carlton Dr
Carol Stream, 60188

A.W.E. are the Indoor Air Quality experts!

Gray's Mechanical Gray's Mechanical
Carol Stream, 60188

Grays Mechanical, Inc., is a family owned and operated Heating and Air Conditioning company