Nordic Pure 20x25x5 Replacement Air Filter MERV 8 + Carbon 2 Pack

In this review the Nordic Pure 20x25x5 replacement air filter is evaluated for homeowners who need reliable particle capture plus basic odor control. The bottom line is that this two pack is best for furnaces and return boxes that accept a nominal 20 x 25 x 5 filter but actually require the slightly smaller physical dimensions; the reviewer found the filter's MERV 8 media balanced good dust capture with low airflow restriction and the fused carbon layer helped reduce pet and cooking smells without sacrificing fit.

Key Features

• Actual size guidance: The stated actual size of 19 3/4 x 24 3/4 x 4 3/8 in helps ensure buyers measure their filter slot and avoid wrong fits.
• Odor control: A carbon layer is fused to the pleated media so common household odors are attracted to and held by the filter material.
• MERV 8 filtration: MERV 8 performance (equivalent to MPR 800) captures dust and pollen effectively while maintaining acceptable airflow for most residential furnaces.
• Lennox replacement fit: Made to replace Lennox X6673 and X6675 media filters, offering a direct alternative for that model family when sizing matches.
• Two-pack value: Sold as a 2 pack which provides a spare filter and reduces the frequency of ordering for routine replacements.
• Made in the USA: Domestic manufacture provides traceable quality and consistent construction compared with some imported alternatives.

Who It's For

This filter is aimed at homeowners and renters who need a straightforward replacement for a nominal 20 x 25 x 5 filter housing but who will take the time to measure their slot and confirm the actual 19 3/4 x 24 3/4 x 4 3/8 in dimensions. It is a practical choice for households with pets or frequent cooking odors where basic activated carbon adsorption can make indoor air more pleasant.

Those with high allergy sensitivity, asthma, or who require HEPA-level cleaning should look elsewhere for higher MERV ratings and finer particle capture. Also check fit carefully if your furnace uses a bottom return style box or nonstandard frames, since actual size variance matters more with 4 in and 5 in depth filters.

Pros & Cons

Pros

• Good balance of dust capture and airflow from a MERV 8 pleated media.
• Fused carbon layer reduces common household odors such as pet and cooking smells.
• Actual size clearly listed to prevent fit surprises and made to replace specific Lennox models.
• Two-pack offers convenience and value for routine replacements.

Cons

• Actual size differs from nominal size, so customers must measure to ensure a proper fit.
• Not designed for very high filtration needs where a higher MERV or HEPA solution is required.

Specifications

Brand	Nordic Pure
Nominal size	20 x 25 x 5 in
Actual size	19 3/4 x 24 3/4 x 4 3/8 in
MERV rating	MERV 8 (equivalent to MPR 800)
Replaces	Lennox X6673, X6675
Pack quantity	2 filters
Country of manufacture	Made in the USA

Our Verdict

The Nordic Pure 20x25x5 MERV 8 plus carbon two pack is a sensible, value-oriented choice for homeowners who measure their filter slot and want modest odor reduction along with reliable dust capture. It is not a high-efficiency medical-grade filter, but for general household use and compatibility with Lennox X6673/X6675 replacements it represents good value and consistent performance.

Frequently Asked Questions

Will this filter fit my 20 x 25 x 5 slot?
Measure your current filter slot and compare to the listed actual size 19 3/4 x 24 3/4 x 4 3/8 in to confirm a proper fit.

Does the carbon layer remove strong odors?
The activated carbon helps reduce common pet and cooking odors, but it is not a substitute for specialized odor remediation for very strong or chemical smells.

How often should these filters be replaced?
Replacement frequency depends on household conditions, but typical residential use suggests checking monthly and replacing every 1 to 3 months as needed for airflow and dust load.