24 x 30 x 1 Air Filters

This 24x30x1 furnace and AC filter is the 3M Filtrete 1500 Ultra Allergen Reduction, which is MERV 12 on 3M's MPR-to-MERV conversion chart, sold as a 4-pack of filters. Filtrete recommends changing 1-inch filters like this one at least every 3 months.

Filtrete 1500 24x30x1 at a glance

The Filtrete 1500 24x30x1 is a 1-inch pleated filter rated MPR 1500, which 3M lists as equal to MERV 12.

• Size: 24 x 30 x 1 (nominal)
• Rating: MPR 1500 / MERV 12
• Pack: 4 filters

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Common questions

What MERV is Filtrete 1500?

Filtrete 1500 is MERV 12, according to 3M's own MPR-to-MERV conversion chart. MPR is 3M's rating system. MERV is the industry scale based on an ASHRAE test method. On the EPA's MERV scale, MERV 12 sits between MERV 11 and MERV 13.

How often should you change a 24x30x1 filter?

A 24x30x1 filter should be changed at least every 3 months, according to Filtrete. At that interval, one 4-pack covers about a year of filter changes. Write the install date on the filter frame so you know when the next change is due.