Andrew J. Thielen

Senior Managing Consultant at Demonstratives

Andrew Thielen is an accomplished Mechanical Engineer with more than 37 years of engineering experience. He provides expert consultation to the construction industry, primarily in terms of HVAC, plumbing, district heating, and cooling systems. In addition, he was the primary editor of the State of Minnesota Commercial Energy, Mechanical and Fuel Gas Building Codes used in Minnesota from 2008 to 2014. Andy also performs failure analysis.

Clients seek out Andy for his extensive experience in building construction and his commitment to building a trusting relationship and value to the client. By pairing his broad background in the construction industry with forensic investigation Mr. Thielen minimizes his clients’ exposure and has saved them large sums of money.


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