Merv 8 4" Furnace Filter

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Koch 4" Merv 8 Air Filter (6 Pack)

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Availability: Usually Ships in 3 to 5 Days
Product Code: KFC-M8-04-6PACK

Description

Performance and Comparison Information

Guarantee

The Koch Multi-Pleat is a medium efficiency extended surface pleated panel filter. It carries a MERV 8 and MERV 8-A performance rating in accordance with ASHRAE Test Standard 52.2-2012 and is an excellent upgrade from disposable filters and standard MERV 6 and 7 rated pleated filters.

The Koch Multi-Pleat is the best selection in applications such as hospitals, laboratories, pharmaceutical plants, commercial office buildings, and in any system in which a higher degree of indoor air quality is required. The Multi-Pleat media is produced with an optimal blend of highly specialized fibers, developed by Koch Filter Corp. specifically for use in extended surface air filters. Developed to deliver a “one of a kind” performance, this specialized media operates on mechanical filtration principles which provide high efficiency, low pressure drop and high dust holding capacity.

Koch Merv 8 filters are available in 66 sizes so you are sure to find the size you are looking for.

Dimensions
Nominal sizes are generally what is used in the HVAC industry when referring to filter size. Nominal dimensions are what will typically be printed on the side of the filter you are replacing. Actual size will generally be up to 1/2" less then the printed dimensions. If you are unsure or need help selecting your filter size please feel free to call our customer service line (877) 973-3030.

Nominal Size	Actual Size

12 x 24 x 4	11.375" x 23.375" x 3.75"
16 x 20 x 4	15.5" x 19.5" x 3.75"
16 x 25 x 4	15.5" x 24.5" x 3.75"
18 x 24 x 4	17.5" x 23.5" x 3.75"
20 x 20 x 4	19.5" x 19.5" x 3.75"
20 x 24 x 4	19.5" x 23.5" x 3.75"
20 x 25 x 4	19.5" x 24.5" x 3.75"
24 x 24 x 4	23.375" x 23.375" x 3.75"

Average Customer Review: Average Customer Review: 5 of 5

5 of 5 Total Reviews: 4 Write a review.

4 of 4 people found the following review helpful:

Great Bargin	October 20, 2025
Reviewer: Lawrence Donohoo from Commerce City, CO.

Really good filters recommended by my HVAC service man.

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1 of 1 people found the following review helpful:

GOOD	October 9, 2025
Reviewer: BOB SHORES from Warminster, PA.

Works like it should.

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1 of 1 people found the following review helpful:

Thanks!	June 21, 2022
Reviewer: Luke Vahey from Silex. Mo

Great product.

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1 of 1 people found the following review helpful:

Excellent!!	May 3, 2022
Reviewer: Anonymous Person

Excellent quality, filters fit just right!

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