SEALED - Filtrete 18x24x1 MERV11 4-pack

Updated September 22, 2026

Notes: SEALED Condition: SEALED Brand: Filtrete Model: AD21-2PK-1E Title: Filtrete 18x24x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 17.81 x 23.81 x 0.81 in) MAKE YOUR HOME YOUR SANCTUARY: 4-pack of 3-month pleated Filtrete 18x24x1 MERV 11 MPR 1000 AC Furnace Air Filter helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment EXCLUSIVE TECHNOLOGY: Designed with Filtrete 3-in-1 technology to pull in and trap unwanted particles, allowing cleaner air to flow through COUNTLESS MICROPARTICLES: With a 1000 MPR and MERV 11 rating, your Filtrete Filter will help capture many microparticles from the air passing through it CERTIFIED: This furnace filter is CERTIFIED asthma and allergy-friendly (2) and helps capture dust, lint and other allergens in your household air CHANGE YOUR FILTER OFTEN: For optimal performance, make sure to change your filter at least once every 90 days VERSATILE USES: Works for changing the air filters in your furnace, air conditioner/heating system or HVAC system SMART APP: Use the Filtrete Smart App (iOS or Android) to set 30-, 60- or 90-day reminders to change your air filter MOST TRUSTED: Filtrete Brand is North America's most trusted brand of HVAC Filters, based on 2024 Sago US Brand Health Survey of Residential HVAC Air Filters.

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