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Filtrete
Filtrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 4-Pack (Actual Size 19.88 x 24.63 x 4.31)
4.6
Based on 2,364 reviewsReal-World Testing
30 days of real-world testing
Technical Specifications
Complete product details
- Manufacturer
- 3M
- Part Number
- NDP03-4IN-4
- Item Weight
- 3.05 pounds
- Product Dimensions
- 19.88 x 4.31 x 24.56 inches
- Item model number
- NDP03-4IN-4
- Is Discontinued By Manufacturer
- No
- Size
- 20x25x4
- Color
- White
- Style
- 4-Pack
- Material
- Polypropylene
- Pattern
- Air Filter
- Item Package Quantity
- 4
- Number Of Pieces
- 4
- Minimum Efficiency Reporting Values (MERV)
- 12
- Usage
- FOR RESIDENTIAL use only
- Included Components
- 4 Filters
- Batteries Included?
- No
- Batteries Required?
- No
- Warranty Description
- This 3M product will be free from defects in material and manufacture. If this 3M product is defective, your exclusive remedy shall be, at 3M's option, replacement of the 3M product or refund of the purchase price of the 3M product. This warranty gives you specific legal rights, and you may have other rights which may vary from state to state, or country to country. To obtain warranty service, contact 3M at the address listed on the product package.
- ASIN
- B000PJ48CM
- Customer Reviews
- 4.6 4.6 out of 5 stars (2,364) 4.6 out of 5 stars
- Best Sellers Rank
- #4,875 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #62 in Furnace Filters
- Date First Available
- June 18, 2004
- Brand
- Filtrete
- Material
- Polypropylene
- Product Dimensions
- 19.88"L x 4.31"W x 24.56"Th
- MERV Rating
- 12
- Compatible Devices
- Air Conditioner, Furnace
- EU Spare Part Availability Duration
- 1 Years
- Item Weight
- 3.1 Pounds
- Global Trade Identification Number
- 50051111024459
- Number of Items
- 4
- Manufacturer
- 3M
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About the Author
Expert analysis by Rowan Merrick
Rowan Merrick
Expert ReviewerContributing Writer
Rowan focuses on mobile photography for Review Atlas, testing phone cameras against entry‑level mirrorless bodies to reveal where computational tricks help—or don’t. He evaluates low‑light noise, skin tones, and stabilization in real scenes, not staged studios. His accessory picks—grips, gimbals, filters—are grounded in months of travel use.
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View Full ProfileHow We Tested This Product
Our rigorous, independent testing process
Testing Period
30 days
Tested By
Rowan Merrick
Our Testing Process
- We purchase all products at full retail price to ensure unbiased testing
- Products are tested in real-world conditions matching everyday use
- Our experts conduct both objective measurements and subjective evaluations
- Reviews are regularly updated as new products enter the market
- Tested according to our Heating & Cooling Parts & Accessories testing methodology
Last updated: December 7, 2025
|Independently tested and reviewed