This Recommended Practice (RP) covers definitions, procedures for evaluating performance, and major requirements of unidirectional-flow, clean-air devices. The RP may be used to define a basis of agreement between customer and supplier in the specification, procurement, and certification testing of unidirectionalflow, clean-air devices with self-contained motorblower( s) and powered terminal units with replaceable filter. This document also presents recommendations for recertification of devices owned by the customer, under direction of the customer.

BACKGROUND AND PURPOSE

This RP provides a set of recommended test procedures for determining clean-air-device performance. The principal purpose of clean-air-device performance testing is classification of air cleanliness in accordance with ISO 14644-1. Additional tests, such as those related to airflow characteristics, sources of particles, device pressurization and integrity, and environmental issues, provide a more complete characterization of performance of the device. When purchasing a clean-air device, appropriate sections of this RP should be referenced in the purchase order to define the expected performance of the unit as received.