Medical Grade True Hepa Filter: The H13 medical grade true HEPA filters 99.97% of airborne pollutants, dust, pollen, and other allergens as small as 0.3 microns.

• Long-lasting Air Filter: All Westinghouse 1804 HEPA air filter replacements can be used up to 3,000 hours of operation; an indicator light on the unit will let you know when it’s time to replace; An indicator on the unit notifies you if the filter needs to be changed and also when you’ve installed the filter incorrectly.
• Effective And Safe: Trap dust mites, pollen, and other allergens with a True HEPA filter guaranteed to work effectively so you can breathe easy.
• Model 1804 Replacement: This air purifier HEPA filter is a replacement for the Westinghouse air purifier with NCCO technology model 1804"
• Captures particulates (PM2.5), mold, bacteria and viruses
• Combat Harmful Allergens: The 1804 tackles harmful allergens up to 2.5PM, including smoke, pet dander, dust and mold and deodorizes in the process.
• Includes 4 Hepa Filters