Nordic Pure 20x25x4 Pleated Air Filter MERV 13 Plus Carbon

In this review the Nordic Pure 20x25x4 Pleated Air Filter MERV 13 Plus Carbon is evaluated for homeowners who want a higher-efficiency replacement filter with odor control. The bottom line: it is a practical option for residential furnaces that need a true 4 in depth filter and strong particle capture, because the MERV 13 media with an activated charcoal panel removes fine dust and helps with common household odors. Measure your existing filter first, as the company emphasizes the actual size differs from the nominal size.

Key Features

• Actual size accuracy: The filter lists its actual dimensions as 19.5 x 24.5 x 3.63 in so buyers can compare this to their old filter for a correct fit.
• MERV 13 filtration: The MERV 13 rating is equivalent to MPR 2200-2400, providing higher capture of fine airborne particulates for improved indoor air quality.
• Plus carbon layer: A flat panel infused with activated charcoal helps reduce common household odors in addition to trapping particles.
• Electrostatic synthetic media: The charged synthetic material is designed to attract and hold dust and small particles more effectively than basic fiberglass filters.
• Made in the USA: Manufactured domestically, which may be important to shoppers who prefer locally made HVAC consumables.
• Size guidance: The listing warns of nominal versus actual depth differences and directs customers to the 20x25x5 option if they need a 4 3/8 in actual depth.

Who It's For

This filter is best for homeowners with furnaces or HVAC return housings that accept a nominal 20 x 25 x 4 filter and measure close to the stated actual size of 19.5 x 24.5 x 3.63 in. It suits households seeking MERV 13 level filtration plus an added carbon layer for basic odor control without upgrading to a deep 5 in unit.

It is not the right choice for systems that require an actual depth of 4.38 in or for buyers who expect an exact nominal-to-actual match; several customers reported a loose fit or that the filter felt thinner than expected. Those users should measure their filter box and consider the 20x25x5 option referenced by Nordic Pure.

Pros & Cons

Pros

• High particle capture with MERV 13 media for better indoor air quality.
• Activated charcoal panel provides additional odor reduction compared with standard pleated filters.
• Easy to install and slides into most residential filter slots without difficulty.
• Made in the USA, which may be preferred by some buyers.

Cons

• Actual dimensions differ from the nominal size and some customers reported a loose fit or perceived thinner material.
• Not suitable if your system requires an actual depth of 4.38 in; the 20x25x5 model is the recommended alternative.

Specifications

Nominal size	20 x 25 x 4 in
Actual size	19.5 x 24.5 x 3.63 in
Filtration rating	MERV 13 (equivalent to MPR 2200-2400)
Media	Electrostatically charged synthetic with activated charcoal panel
Quantity	2 pack
Country of manufacture	Made in the USA

Our Verdict

The Nordic Pure 20x25x4 MERV 13 Plus Carbon filter is a sensible midrange choice for homeowners who measure their filter slot and need stronger particle capture plus modest odor control. It represents good value for those who accept the actual size listed, but buyers who find the fit loose or need a slightly deeper actual depth should choose the 20x25x5 alternative instead.

Frequently Asked Questions

Will this filter fit my 20 x 25 x 4 slot?
Measure the existing filter and compare it to the actual size 19.5 x 24.5 x 3.63 in; nominal labels can differ from actual dimensions.

Does the carbon layer remove strong odors?
The flat activated charcoal panel helps reduce common household odors, but it is not a substitute for specialized odor or gas-adsorbing systems.

Is this the same depth as some Honeywell or Lennox filters?
No, if your replacement requires an actual depth of 4.38 in you should order the 20x25x5 option that matches that depth.