Exact Filters 39-1/4″ x 27-1/2″ x 1″ Pleated HVAC Filter, MERV 13 – 12-Pack

Description

This 39-1/4 x 27-1/2 x 1″ Exact Filters® air filter is manufactured to your exact dimensions, eliminating the guesswork of matching an off-the-shelf filter to a non-standard 39-1/4 x 27-1/2 x 1″ opening.

Filter bypass — air slipping past a loose frame instead of through the pleats — is one of the most common reasons a filter underperforms its MERV rating in the real world. A precise fit closes that gap.

At MERV 13, this filter removes a significantly larger share of fine particulate from your return air than standard mid-efficiency ratings — including smoke, bacteria-sized particles, and the fine dust that tends to resettle faster after cleaning. Because the media is denser, a properly sized HVAC system matters: check your blower’s static-pressure headroom before upgrading.

Specifications

• Nominal size: 39-1/4 x 27-1/2 x 1″
• Actual dimensions: 39-1/4 x 27-1/2 x 3/4″
• Efficiency rating: MERV 13
• Quantity: 12 filters per carton

Common applications for a 39-1/4 x 27-1/2 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
• Made to your exact 39-1/4 x 27-1/2 x 1″ specification — no trimming or taping required at installation
• Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
• Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments

Same 39-1/4 x 27-1/2 x 1″ size, different efficiency rating

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