Air Systems Cleaning Specialist (ASCS) Certification Exam

What type of filter should a negative air machine use to capture fine particulates during duct cleaning?

HEPA filter rated to capture 99.97% of particles at 0.3 microns Standard fiberglass panel filter Electrostatic filter Carbon activated filter only

HEPA filter rated to capture 99.97% of particles at 0.3 microns

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