Nordic Pure 20x25x4 Pleated MERV 15 Air Filters 6 Pack - High

In this review of the Nordic Pure 20x25x4 Pleated MERV 15 air filters, the bottom line is simple: these filters are aimed at homeowners who want high particle capture and solid value without specialty installation. Our review finds them especially useful for anyone seeking MERV 15 level filtration to reduce airborne dust, pollen and fine particles. They are sold as a nominal 20 x 25 x 4 but the reviewer cautions readers to measure the existing filter and compare to the listed actual size to ensure a snug fit.

Key Features

• Nominal and actual sizing: The package lists a nominal 20 x 25 x 4 size while the actual filter measures 19 1/2 x 24 1/2 x 3 5/8, so buyers should measure first to confirm fit.
• MERV 15 efficiency: High-efficiency pleated media captures a wide range of airborne particulates, making it suitable for homes prioritizing indoor air quality.
• Electrostatically charged media: The synthetic pleated material is electrostatically charged to attract and trap fine dust and other particles more effectively than flat filters.
• Made in the USA: Manufactured domestically, which some buyers prefer for quality control and supply consistency.
• 6 pack value: Sold as a six-pack, offering a straightforward replacement supply for several months of regular use in many homes.

Who It's For

This filter is best for homeowners and renters with forced-air furnaces or HVAC systems who want high-efficiency MERV 15 filtration without specialty frames or adapters. It suits allergy-conscious households and anyone looking for a multi-pack to simplify routine replacements.

People who should look elsewhere include those whose filter slots require a different actual depth (for example, units taking a 4 3/8 depth) or buyers who cannot accommodate the listed actual dimensions; measuring your current filter is essential before purchasing.

Pros & Cons

Pros

• High particle capture thanks to the MERV 15 pleated, electrostatically charged media.
• Made in the USA and sold in a six-pack for straightforward replacements and value.
• Clear actual dimensions are provided so buyers can compare and avoid fit issues.

Cons

• Actual size differs from the nominal size and measures about 3 5/8 in deep, so some buyers reported fit or bypass issues if they expected a full 4 in depth.
• A small number of users noted potential bypass when the filter does not seat perfectly, so careful measurement and installation are important.

Specifications

Our Verdict

Nordic Pures 20x25x4 MERV 15 pleated filters are a strong choice for buyers who need high-efficiency filtration and prefer a multi-pack replacement option. They offer good particle capture and value, but the important caveat is to measure the current filter slot and compare to the actual dimensions to avoid fit or bypass issues.

Frequently Asked Questions

Are these true 4 in filters?
They are sold as nominal 20 x 25 x 4 but the listed actual depth is about 3 5/8 in, so measure your slot before buying.

How do these compare to MPR ratings?
Nordic Pure states MERV 15 is equivalent to about MPR 2800, indicating high particle capture.

Can these replace Honeywell or Lennox filters?
They can replace many 20x25x4 units, but if your existing filter has a 4 3/8 actual depth you should consider the 20x25x5 Honeywell replacement option instead.