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21 1/4 x 24 1/2 x 1 MERV 11 Pleated Air Filter (6-Pack)

Actual Dimensions: 21 1/4" x 24 1/2" x 1"
Product Number: P15S.0121D24H
Price: $75.78 & FREE Shipping
In Stock.
Ships in 5 Business Days or less.
  • MERV 11
  • 21 1/4" x 24 1/2" x 1"
  • 1-3 Microns
  • Ships in 5 Business Days
  • FPR 7
List Price: $95.94
$75.78 6-Pack
You Save $20.16 (21%)
Extra 10% Off on 12 or more
$136.44 12-Pack


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Pleated MERV 11 Media

Comparable to MPR 1000 to 1200 and FPR 7

Designed for Superior Filtration Efficiency

Made with electrostatically charged synthetic material that draws and captures allergens between 1 - 10 microns, including lint, dust mites, mold spores, pollen, pet dander, dust, and smoke.

Improve Indoor Air Quality

Protect your family and loved ones with clean indoor air quality at home. Aerostar filters are a simple and cost effective step towards a healthier home environment, free of airborne allergens and particles that can trigger various allergy and asthma symptoms.

Improve Efficiency and Reduce Cost

An Aerostar furnace air filter helps keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor. When your unit runs properly, it consumes less energy, requires less maintenance and will have a longer life.  These factors will have an impact on your utility bill and maintenance costs. It is recommended that you change the filter every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest.

About Aerostar Furnace Air Filters

Aerostar filters are manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions for residential, commercial and industrial applications. The Aerostar brand is known for constantly innovating and improving their technology to help make filtration more efficient, effective and environmentally friendly every day.

About MERV, MPR and FPR Rating

The three rating systems were created by different organizations. MERV is the domestic and international Industry Standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. The other two rating systems were created by 3M and The Home Depot, but all are rating the same filter.

MERV Rating (Minimum Efficiency Reporting Value): As you have already learned, the MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.

MPR (Micro-Particle Performance Rating): MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.

FPR (Filter Performance Rating): FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.

What's in the Box

Box of six Aerostar MERV 11 Pleated Furnace Air Filters. MERV 11 filters are comparable to MPR 1000 to 1200 and FPR 7 ratings


Compare MERV, MPR, and FPR with the chart below


Made in the USA

Change Frequency:

60-90 Days



Chemically Treated:




MERV Rating Chart

  • SKU P15S.0121D24H
  • Lead Time Message: "SHIPS in 5 Business Days" from a location nearest you. This product is made to order in our warehouses nationwide. Delivery will depend on Shipping method and delivery location.
  • Air Filter Type: Pleated
  • Quality: Micro Allergen
  • Material Pleated
  • MERV 11
  • MPR: MPR 1000-1200
  • FPR: FPR 7
  • Captured Particle Size: 1-3 Microns
  • Size: 21 1/4 x 24 1/2 x 1
  • Actual Size 21 1/4" x 24 1/2" x 1"
  • High Capacity
  • Change Frequency: Every 60-90 Days
  • Equipment Protection Yes
  • Pleats Per Foot 16
  • Lint Dust Yes
  • Dust Mites Yes
  • Mold Spores Yes
  • Pollen Yes
  • Pet Dander Yes
  • Fine Dust Yes
  • Auto Emissions Yes
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