NMU prof ranked in top 10

MARQUETTE — Nick Griewahn, a Technology and Occupational Sciences professor at Northern Michigan University, is one of the top 10 air conditioning and refrigeration instructors in the nation, according to HVACClasses.org.

Griewahn teaches courses such as principles of air delivery systems and advanced commercial refrigeration systems. He is a certified commercial air conditioning and commercial refrigeration educator, holds bachelor’s and master’s degrees and earned both EPA and North American Technician Excellence certifications.

He is especially interested in conservation, particularly related to refrigeration and alternative refrigerant solutions.

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