Filter King 25x28x1 Air Filter 4-Pack - MERV 13 Performance

In this review the Filter King 25x28x1 4-pack is assessed for homeowners and renters who want higher filtration without complicated installation. The bottom line: these pleated MERV 13 1-in filters are best for those seeking improved particle capture and a snug fit in standard furnace and A/C housings, with the greatest single benefit being stronger filtration over basic fiberglass panels while still allowing straightforward fast installation.

Key Features

• MERV 13 rating: Captures a wide range of airborne particles, offering better indoor air quality compared with lower-MERV disposable filters.
• Pleated design: The pleats increase surface area so the filter traps more contaminants and extends usable life between changes.
• Made in USA: Fully manufactured in the United States using materials and construction that reference EPA establishment 103501-FL-1.
• Actual sizing listed: Advertised as 25 x 28 x 1 in with an actual measured size of 24.5 x 27.5 x 0.75 in to help users measure and confirm fit before purchase.
• Up to 90 days life: Designed to last up to 90 days depending on household conditions, with a recommended change interval of 30 to 90 days for 1-in filters.
• Tool-free replacement: Simple open, slide and close replacement makes swaps quick and reduces service time.

Who It's For

This pack is aimed at homeowners or renters with forced-air heating and cooling who want higher-efficiency filtration without altering their HVAC system. It is especially useful for households concerned about allergens or fine particles who can benefit from a MERV 13 rated media.

Those who should look elsewhere include owners of systems that require exact factory-specified thickness or custom sizes, and people who need thicker filters or washable/reusable media; the actual dimensions are slightly under the nominal size so careful measurement is advised before ordering.

Pros & Cons

Pros

• Higher filtration efficiency with MERV 13 media for improved indoor air quality.
• Pleated construction captures more particles and can extend time between changes.
• Made in the USA and fully manufactured under EPA establishment 103501-FL-1.
• Quick, tool-free installation makes replacement fast and easy.

Cons

• Actual size is 24.5 x 27.5 x 0.75 in, which some customers found smaller than expected and requires pre-measurement.
• Mixed feedback on build quality means a few users reported weaker construction compared with heavier-duty brands.

Specifications

Brand	Filter King
Nominal size	25 x 28 x 1 in
Actual size	24.5 x 27.5 x 0.75 in
MERV rating	MERV 13
Pack quantity	4-pack
Recommended change interval	30 - 90 days
Manufactured	Made in USA (EPA establishment 103501-FL-1)

Our Verdict

The Filter King 25x28x1 4-pack is a practical choice for users seeking better filtration without complex changes to their HVAC. It delivers MERV 13 performance, easy installation and a pleated design that improves capture and life span, though buyers should measure for fit because the actual dimensions are slightly smaller than the nominal size.

Frequently Asked Questions

Will these filters fit my 25 x 28 x 1 slot?
They are sold as 25 x 28 x 1 in but measure 24.5 x 27.5 x 0.75 in actual size, so verify your slot tolerances before ordering.

How often should I replace them?
Filter King recommends changing these 1-in pleated filters every 30 to 90 days depending on use and air quality; they can last up to 90 days in low-load settings.

Are these washable or reusable?
No; these are disposable pleated MERV 13 filters intended for replacement, not washing or reuse.