The antimicrobial hospital grade Pre-Max Filter is the first stage in the Cleanroom Series filtration process. It does fine dust filtration with mini-pleat 55% efficient media at ≥ 0.3 μm (ASHRAE 90-95%, Class F8) and prolongs the life of HyperHEPA® filter. Lasts upto 2 years (based on average daily usage of 10 hours on speed 3). The surface area is 7 sq.mtrs.
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