39-3/8″ x 36-1/2″ x 1″ MERV 13 Pleated Air Filtration System Filter – 12-Pack

Description

Exact Filters® produces this 39-3/8 x 36-1/2 x 1″ filter to your measurements, so instead of trimming, taping, or forcing a “close enough” size into place, you drop in a filter that fits your 39-3/8 x 36-1/2 x 1″ slot the first time.

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.

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: 39-3/8 x 36-1/2 x 1″
• Actual dimensions: 39-3/8 x 36-1/2 x 3/4″
• Efficiency rating: MERV 13
• Quantity: 12 filters per carton

This 39-3/8 x 36-1/2 x 1″ filter size is frequently ordered by homeowners with older systems, property managers handling mixed-vintage HVAC equipment, and facilities maintenance teams servicing buildings where no two return grilles seem to measure the same.

Features

• Cardboard frame with reinforced media for structural stability during handling and installation
• Made to your exact 39-3/8 x 36-1/2 x 1″ specification — no trimming or taping required at installation
• Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
• Sold as a 12-pack so you have a full year of replacements on hand

Same 39-3/8 x 36-1/2 x 1″ size, different efficiency rating

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