Carbon-based filter with additional Whishield anti-microbial layer of purification. Pre - cleans the air and eliminates over 99.99% of germs and bacteria. Removes larger particles and common household odors including smoke, cooking odors and pet odors. Pre-filter’s Whishield anti-microbial layer helps HEPA filter lasts longer and freshens the air. Inhibits the outgrowth of micro-organisms in the filter.
Pre-filter Duration: Replace every 3 months (depends on your air quality)
What's in the package: A set 4 pre-filters (lasts 12 months)
Fits for: WP1000, WPPRO2000 series
Product Size: 17.87” x 17.68” x 0.12”inches