This is to certify that

Jens Friedrichsen

has successfully completed

E – 1434 – Carrier; Commercial Duct Design

Instructor:
Mr. Mark Brown

1.00 PDH Units

November 29, 2021

NYSED Sponsor 179

Dr. Hisham N. Ashur, Ph.D, CQE

PDH Source, LLC

PO. Box: 981. Charlottesville, VA 22902. USA

11138 11 2021 65684