July 22, 2016
Securities and Exchange Commission
100 F Street N.E.
Washington, D.C. 20549
We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that
occurred on July 20, 2016, to be filed by our former client, The Castle Group, Inc. We agree with
the statements made in response to that Item insofar as they relate to our Firm.
Very Truly Yours,
Gateway 5 • 178 S Rio Grande Street, Suite 200 • Salt Lake City, Utah 84101 • (801) 269-1818 • Fax (801) 266-3481