Filtrete 20x25x1 Air Filter MERV 11 (MPR 1000) 4-Pack — 1-inch Pleated, 90-Day Allergen & Pet Dander Protection

Filtrete 20x25x1 MERV 11 (MPR 1000) is a pleated 1-inch HVAC air filter sold in a 4-pack designed to trap allergens, pet dander and many microparticles while maintaining reliable airflow for furnaces and air conditioners.

This four-pack of Filtrete 20x25x1 filters (actual size 19.68 x 24.68 x 0.81 in) uses Filtrete 3-in-1 media and a MPR 1000 / MERV 11 rating to remove a wide range of airborne particles from home HVAC systems. Each filter is rated for up to 90 days of typical use; swapping them seasonally helps preserve system efficiency and keeps indoor air feeling fresher. The filters are compatible with most furnaces, air conditioners and HVAC units that accept a 1-inch pleated filter.

How does this Filtrete filter improve household air without reducing airflow?

The pleated design increases surface area to capture particles while allowing steady airflow through the HVAC system. Filtrete’s media balances filtration efficiency and pressure drop so your system delivers conditioned air without overworking.

• 3-in-1 media traps a mix of large and small particles.
• MPR 1000 targets microparticles in addition to pollen and dust.
• Pleated construction provides more filter area for airflow.
• Designed for standard 1-inch slots in furnaces and ACs.

Which particles can the MPR 1000 / MERV 11 rating capture?

This rating indicates the filter captures many common household particulates, including pet dander, smoke and pollen, along with larger debris like lint and dust. It helps reduce the concentration of these particles in the air passing through your HVAC system.

• Microparticles such as smoke and smog in the 0.3–1.0 micron range.
• Allergens like pollen, dust mite fragments and pet dander.
• Larger particles such as lint, fibers and household dust.
• Works consistently for typical residential air circulation.

How often should I replace these filters and how can I remember?

Filtrete recommends changing the 1-inch pleated filter every 90 days under normal conditions to maintain optimal performance. The Filtrete Smart App can scan the filter barcode to set 30-, 60- or 90-day reminders, simplifying replacement scheduling.

• Replace at least every 90 days for typical households.
• Consider more frequent changes with pets or high pollution.
• Use the Filtrete Smart App to scan packaging and set alerts.
• Four filters provide year-round coverage when rotated quarterly.

Is this filter compatible with my HVAC system and is it certified?

These 20x25x1 filters fit most residential furnaces and air conditioning systems that accept 1-inch pleated filters. The Filtrete MPR 1000 model is certified asthma and allergy-friendly, and Filtrete is a widely recognized HVAC filter brand across North America.

• Actual dimensions: 19.68 x 24.68 x 0.81 inches for correct fitment.
• Intended for furnace, AC and standard HVAC return slots.
• Certified asthma and allergy-friendly by applicable bodies.
• Packaging may vary; product performance remains the same.

Who is this for: Homeowners and renters who want a straightforward, seasonal filtration solution that balances particle capture with consistent airflow. This Filtrete 4-pack is well suited for households with pets, allergy-prone residents, or anyone aiming to reduce common indoor particles without upgrading to a thicker or specialty filter. Choose these 1-inch replacements if you need reliable, easy-to-install filters that work with most residential HVAC systems and benefit from app reminders for timely changes.