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SKU 7100189216
Legacy SKU 70009106637
UPC 00051111024126
Catalog Number UA21-4
Product Number UA21-4

The Filtrete Premium Allergen, Bacteria & Virus Filter outperforms all 1" filters. It attracts and captures microscopic particles like bacteria and particles that can carry viruses and large particles like mold spores and pollen. For residential use only.

  • #1 Recommended Brand* (*Filtrete Brand is the most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022)
  • The higher the MPR, the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it
  • FOR OPTIMAL PERFORMANCE of your heating & cooling system or HVAC system, change your home air filter at least every 90 days for 1 inch filters
  • A dirty filter will slow down air flow and make the system work harder to keep you warm or cool--wasting energy. Sign-up for a filter change reminder program (www.filtrete.com/ChangeReminders) that works for you!
  • OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system
  • DESIGNED WITH EXCLUSIVE Filtrete™ Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through
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On it's way to you May 24   

Qty

Minimum Order 4 Items
Order Increment 4 Items
  Outstanding Air Filteration
  Perfect for Offices
  Fast Shipping
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Weight 1.0115 lbs
Width 17.83858
Length 0.77992
Height 23.84016
Thickness 1 in 2.54 cm
Shipping Dimensions
Weight 4.046 lb
Length 18.3748 in
Width 4.3748 in
Height 25 in

PRODUCT FAQ

  1. Is the Filtrete™ Premium Allergen, Bacteria & Virus Air Filter easy to install?

    Yes, the Filtrete™ air filter is designed for quick and hassle-free installation. Simply follow the instructions provided on the packaging or visit our website for installation tips.

  2. How often should I replace this particular air filter?

    We recommend replacing the 3M Filtrete™ Premium Allergen, Bacteria & Virus Air Filter every 6-12 months for optimal performance. However, depending on your unique environment and usage, you may need to change it more frequently.

  3. Does the 1900 MPR rating mean this air filter is effective against common allergens like dust mites and pet dander?

    Absolutely! The high 1900 MPR (Microparticle Performance Rating) indicates that this Filtrete™ air filter is highly efficient at capturing microscopic particles such as allergens, bacteria, and viruses floating in your indoor air.

  4. Can I use this specific size of the Filtrete™ Premium Allergen Air Filter in my HVAC system at home?

    Certainly! The UA21-4 model measuring 18 in x 24 in x 1 in (45.7 cm x 60.9 cm x 2.5 cm) fits most standard residential HVAC systems perfectly. Just ensure it matches your system's specifications before purchasing for a snug fit that works effectively.

Your home should be your sanctuary

At 3M, we believe that your home should be a place of comfort and relaxation. That's why we have developed the Filtrete Premium Allergen, Bacteria & Virus Air Filters. These innovative filters are designed to help create a cleaner and fresher home environment by capturing unwanted particles from your household air.

High performance filters for improved air quality

Our Filtrete Premium Allergen, Bacteria & Virus Air Filters are not just ordinary filters. They are specially engineered to proactively capture dust, bacteria, viruses, and allergens, helping to improve the air quality in your home. With their high performance design, these filters are able to effectively remove these unwanted particles, ensuring that you and your family can breathe easier.

Protecting your home and your health

By using Filtrete Premium Allergen, Bacteria & Virus Air Filters, you are taking a proactive step towards creating a healthier living environment. Dust, bacteria, viruses, and allergens can all contribute to poor indoor air quality, which can have negative effects on your health. Our filters are designed to help reduce these harmful particles, providing you with cleaner and fresher air to breathe.

Experience the difference

Experience the difference that Filtrete Premium Allergen, Bacteria & Virus Air Filters can make in your home. With their advanced filtration technology, these filters are able to capture even the smallest particles, helping to create a cleaner and healthier living space. Say goodbye to dust, bacteria, viruses, and allergens, and say hello to a cleaner, fresher home environment.