• 3M Filtrete 21.5x21.5x1 Air Filter MERV 8, 4-Pack
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Building Materials 3m

3M Filtrete 21.5x21.5x1 Air Filter MERV 8, 4-Pack

3M Filtrete 21.5x21.5x1 Air Filter MERV 8, 4-Pack

$56.66 USD
$56.66 USD
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SKU: 71204x4
UPC: 50076308428384

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Rating: 4.7/5

Sold Past Month: 50

Ranked: #10 in Furnace Filters

Last Updated: June 12, 2026

Keep your home's air clean with the 3M Filtrete 21.5x21.5x1 AC Furnace Air Filter, featuring MERV 8 filtration and MPR 700. This 3-month pleated electrostatic filter effectively traps pollen, dust, and lint while maintaining strong airflow, making it ideal for households seeking improved indoor air quality. The 4-pack ensures you have replacements on hand for regular maintenance. Actual filter size is 21.19 x 21.19 x 0.81 inches. Designed for reliability and efficiency in central HVAC systems.
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