25 x 25 x 1 Air Filters

The 25x25x1 filter on this page is the 3M Filtrete 1500 Ultra Allergen Reduction, rated MERV 12 on 3M's chart and sold as a 4-pack. Change it at least every 3 months, which is Filtrete's recommended interval for 1-inch filters.

Filtrete 1500 25x25x1 specs

The Filtrete 1500 25x25x1 is a 1-inch filter with an MPR rating of 1500, which equals MERV 12 on 3M's MPR-to-MERV chart.

• Size: 25 x 25 x 1 (nominal)
• Rating: MPR 1500 / MERV 12
• Pack: 4 filters
• Change interval: at least every 3 months

Looking for another size or rating? See air filters by size, all Filtrete air filters, or our air filter finder.

Common questions

Do air filters have to be the exact size?

Yes. Buy the size printed on the frame of your current filter. 25x25x1 is a nominal size, the standard label for this filter slot, so matching the printed size is the reliable way to get a filter that fits.

What MERV is a Filtrete 1500 filter?

A Filtrete 1500 filter is MERV 12. 3M rates its filters on its own MPR scale, and its conversion chart lists MPR 1500 as equal to MERV 12, the industry rating the EPA references.