38.375″ x 31.5″ x 1″ MERV 13 Pleated Air Filter (12-Pack)

Description

When your HVAC system calls for a 38-3/8 x 31-1/2 x 1″ filter and the standard aisle doesn’t carry it, this Exact Filters® unit is cut to your exact 38-3/8 x 31-1/2 x 1″ spec — no shims, no gaps, no bypass air.

Even a quarter-inch of gap around a filter can allow a significant percentage of return air to bypass the media entirely, which is why the exact fit matters as much as the filter’s efficiency rating.

MERV 13 is the top efficiency offered in the Exact Filters® line. It captures the broadest range of airborne particles we make, including fine dust, smoke particles, and the submicron fraction that carries many allergens and bioaerosols. Buildings dealing with wildfire smoke, indoor air-quality concerns, or sensitive occupants commonly step up to this rating.

Specifications

• Nominal size: 38-3/8 x 31-1/2 x 1″
• Actual dimensions: 38-3/8 x 31-1/2 x 3/4″
• Efficiency rating: MERV 13
• Quantity: 12 filters per carton

Common applications for a 38-3/8 x 31-1/2 x 1″ custom filter include retrofit installations, legacy HVAC systems installed before standard sizes were codified, built-in return grilles that were framed to non-standard dimensions, and commercial unit housings that don’t match any current off-the-shelf size.

Features

• Orientation arrow printed on the frame to ensure correct airflow direction at install
• Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
• Cardboard frame with reinforced media for structural stability during handling and installation
• Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow

Same 38-3/8 x 31-1/2 x 1″ size, different efficiency rating

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