The portable PowerHEPA 500 (500 cfm) air scrubber with optional carbon and potassium absorption filter removes 99.9% of all airborne particles, airborne odors, and chemicals. The lightweight and compact (22 x14 x24 in.) unit meets legal requirements for HEPA filtration on jobsites where asbestos removal or lead abatement are performed. Quest Portable Climate Control Equipment. 866-933-7486.