Close
About Blog

Our Satisfaction Guarantee

Free Same-Day Shipping

All U.S. orders get free shipping, and all orders placed on workdays before 1pm EST get shipped that same day. Details here.

Zero-Risk Returns

Not sure you‘re ordering the right part? No worries, we can send you a prepaid return label. Details here.

Best Pricing

We manufacture all of our products and sell them to you with no middleman, so chances are you won't find lower prices anywhere around.

Phone Help Available MON-FRI

Not sure which part you need for your appliance? Give us a ring during working hours (Mon-Fri 9am-5pm EST), and we‘ll help you out promptly:

1-877-750-9239

Close

21x23x1 MERV-11 Air Furnace Filter

0 star rating Write a review
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter
  • 21x23x1 MERV-11 Air Furnace Filter

    19903530499

    $ 35.55 & Free Shipping!

    How often should this part be changed:

    • It's generally recommended to change air filters every 3-6 months based on usage.
    • If you live in a populous city or have allergies or respiratory issues, it is recommended to replace them every 3 months.

    (tap to read)

    QTY
    Info (tap to expand)

    "Set & Forget" are discounted recurring orders, saving your time & cash on repeated purchases. Benefits:

    • 50% on your first order
    • 15% off on each following order
    • Free Shipping always
    • 7 day advance email notification before each order
    • Easy to modify (volume & frequency) and cancel altogether
    • Support staff available Mon-Fri + a complete FAQ's
     

    Compatibility Part And Model Numbers

    Part And Model Number Search:
    Find out if your part number fits this item!

    Compatible PART numbers

    urnace Filters)

    Compatible PART numbers

    This replacement furnace filter will keep your nose and lungs from getting clogged up with gunk. It's got a MERV 11 rating, making it one of the best residential filters you can purchase. That MERV 11 rating means that the filter will remove over 95 percent of debris and particulates that are 1 to 3 microns or larger. That includes the standard stuff like dust mites, pollen, mold spores, and pet dander. It also includes things you wouldn't think about like flour, pudding mix, and hair spray particles. You might not ever really need your filter to take care of those things, but just in case, there it is. Just remember to change your filter every three months (or sooner) to maintain maximum efficiency.

     

      Approximate dimensions:

      • 21" x 23" x 1"
      Real people. Real reviews.
      Sale

      Unavailable

      Sold Out