This is to certify that
Jens Friedrichsen
has successfully completed
E – 1653 Air Distribution System Upgrades for Buildings for Energy Efficiency
Instructor:
Mr. J. Paul Guyer, P.E., R.A.
3 PDH Units
December 10, 2021
NYSED Sponsor 179
Dr. Hisham N. Ashur, Ph.D, CQE
PDH Source, LLC
PO. Box: 981. Charlottesville, VA 22902. USA
43930 12 2021 68559