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Dillett Mechanical - Commercial Industrial HVAC - Waukesha's heating & air conditioning experts! Provide indoor air quality comfort through environmentally-friendly and efficient heating, venting, and mechanical controls. Empower our technicians to solve customer's immediate and long-term needs and deliver the highest value service for commercial and industrial clients seeking a true partnership.

We are a local small business that has the benefit of an extremely diverse work force. Being a union shop we benefit from a state apprenticeship program that requires thousands of hours of school and hands on experience.
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Dillett Mechanical - Commercial Industrial HVAC - Waukesha's heating & air conditioning experts! Dillett Mechanical has been in business over 20 years. Mike Dillett founded Dillett Mechanical in 1996, having over 30 years of experience in commercial and industrial HVAC Mike realized that most industrial and commercial businesses want to reduce their dependency on outside contractors.
Reviews (4)
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Tina Drinka
Jun 23, 2022
The technician, AJ, is truly an amazing worker. He was knowledgeable, polite, and efficient. He ordered the parts needed, came and replaced the damaged parts when he said he would, and has the BEST personality. I am an AJ fan for life. I won't let anyone else work on my Carrier system. If they had 10 star it would not be enough for this guy. Thank you AJ for everything you did! Storage Rentals of America thanks you too!
Timothy Jones
Nov 18, 2021
Great conpany. A little on the pricey side for the work thats done.
Michelle Klemack
May 24, 2021
I had a wonderful experience with Dillett Mechanical. Mike Dertz came to install an electric air cleaner into my unit. He was on time, did a great job, was extremely professional, explained exactly what he was doing, what to expect and gave me his contact info if to reach him if I had additional questions. I would HIGHLY recommend Dillett Mechanical. I also work in the construction industry and would highly recommend them to a commercial /Industrial partner as well as for residential work.
James McMahon
Jun 13, 2020
I have been doing business with Dillett for several years. The whole company has always been great to work with, Jim Budzien is one of the best people in the business. A must call.