Filtrete ADP01-2PK-2 16x25x4 AC Furnace Air Filter - Micro Allergen

Our review of the Filtrete ADP01-2PK-2 finds this 2-pack of 16x25x4 furnace filters ideal for homeowners who want straightforward, effective airborne particle capture without extra fuss. The biggest reason to buy is simple: the Micro Allergen Defense media with MPR 1000 (MERV 11) noticeably cuts dust and common allergens while remaining a non-electrostatic, washable pleated option that balances filtration and airflow for residential HVAC systems.

Key Features

• Micro Allergen Defense media: The MPR 1000 rating targets pollen, pet dander and smoke-level particles for improved indoor air quality.
• Deep pleat construction: The thicker, 4 in. depth increases media surface area so the filter captures more contaminants before needing replacement.
• Compatibility: Designed to fit many Honeywell and Lennox units with actual dimensions of 15.88 x 24.56 x 4.31 in, making it a practical replacement choice.
• 3-in-1 Filtrete technology: Combines capture mechanisms to attract and trap a range of particle sizes while keeping airflow steady for furnace and AC performance.
• Maintenance guidance: The filter works best when replaced on a schedule-every 12 months for 4 in. sizes-and Filtrete offers change reminders to simplify upkeep.

Who It's For

These filters suit homeowners with central heating and cooling who want better-than-fiberglass filtration without the complexity of electrostatic models. They are a sound pick for people managing seasonal allergies, pet dander or general dust buildup and who value balanced airflow for HVAC efficiency.

Those who need a precisely slim or nonstandard size should check measurements carefully before buying, since some customers reported occasional fit issues when furnace slots were tight. Consumers seeking medical-grade or HEPA-level filtration should look elsewhere for higher-efficiency specialty filters.

Pros & Cons

Pros

• Captures a broad range of particles including lint, pollen and smoke thanks to MPR 1000 performance.
• Deep pleat, 4 in. construction increases lifespan and dust-holding capacity compared with 1 in. filters.
• Good value in a 2-count pack and noted by users to perform similarly to higher-priced alternatives.

Cons

• Actual dimensions are slightly under nominal 16 x 25 x 4 and a few users found the fit too large for some slots.

Specifications

Our Verdict

The Filtrete ADP01-2PK-2 16x25x4 is a pragmatic choice for homeowners who want reliable allergen and dust reduction without sacrificing airflow. Its MPR 1000 deep-pleat design provides strong particle capture and overall value in a 2-pack, though buyers should verify the actual 15.88 x 24.56 x 4.31 in dimensions against their furnace slot before ordering.

Frequently Asked Questions

How often should these 4 in. filters be changed?
Filtrete recommends at least every 12 months for 4 in. filters; higher pollution or heavy use may require more frequent changes.

Will this fit my Honeywell or Lennox unit?
The filter is designed to fit many Honeywell and Lennox devices, but confirm the actual 15.88 x 24.56 x 4.31 in dimensions against your slot to avoid fit issues.

What does MPR 1000 mean?
MPR 1000 indicates the filter captures a significant portion of microparticles such as pollen, pet dander and smoke and corresponds roughly to MERV 11 performance.