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SureAire diffuser sections are recommended for use on the positive side of the fan where high velocity or turbulent airflow conditions may occur, and they are furnished with a diffuser plate that promotes evenly distributed mixing of air.
SureSeal side access filter housings are two-stage units designed to accommodate ASHRAE rated filters 6″ to 36″ in depth. They are factory assembled flanged units suitable for installation in a duct or attached to an air handling unit.