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DBTI has built many great ECHO System finished basements over the years. All of them have depressurization versus exhaust flow rate values that exceed our minimum requirements. To my knowledge there has never been a call back. This takes quality, honest workmanship, something I know you can count on from Bill Walls every time.
Douglas S. Walkinshaw, Ph.D., P.Eng.
ECHO System inventor
ASHRAE Fellow
Founding Member of the ISIAQ Academy of Fellows
University of Alberta Alumni Honour Award Recipient
Indoor Air Technologies Inc.
VEFT Aerospace Technology Inc.
ECHO Air Inc.
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