The Aprilaire Model 1210 Air Purifier provides highly efficient, whole-home air cleaning and effective removal of pollen and mold. Compare this to a standard 1 in air filter which isn't an air purifier, and doesn't do any of these things.
Aprilaire®,
Media Air Cleaner, 25 X 20,
"Private Label" for Prime
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https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Research_Products_1410_Specification_Sheet.pdf
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https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/aprilaire-1000-2000-3000-air-purifier-english-spanish-french-installation-guide-B2701359.pdf
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https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/aprilaire-1110-1210-1310-1410-1510-1910-1610-1620-air-purifier-english-spanish-french-owners-manual-B2701304.pdf