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ULPA Filter Option
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The ULPA filter upgrade option replaces the standard H14 HEPA filter with a higher specification U15 ULPA (Ultra-Low Particulate Air) filter. The standard H14 HEPA filter is better than 99.995% efficient at the most penetrating particle size (MPPS), and the upgraded U15 ULPA filter is better than 99.99995% efficient at the MPPS.
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