Nordic Pure 20x20x4 MERV 13 Plus Carbon Pleated Filter - Clean Air

In this review the Nordic Pure 20x20x4 Pleated Air Filter MERV 13 Plus Carbon is assessed for homeowners and renters who want better particulate and odor capture without deep filter replacements. The bottom line: it is a practical single-pack replacement that combines a high-efficiency MERV 13 particle rating with an activated carbon panel to reduce common household odors. Buyers should measure their existing filter carefully before ordering because the box lists a nominal 20 x 20 x 4 size while the stated actual size is smaller.

Key Features

• Actual size guidance: The filter lists a nominal size of 20 x 20 x 4 but gives an actual size of 19.5 x 19.5 x 3.63 in, so purchasers can confirm fit before installing.
• MERV 13 efficiency: The pleated synthetic media is electrostatically charged to capture fine particulates and is equivalent to MPR 2200-2400 for improved indoor air quality.
• Activated carbon layer: A flat carbon panel is infused to attract and reduce common odors and VOCs that plain particulate filters may miss.
• One-pack convenience: Sold as a single replacement filter, it is suitable for trial use or units that require occasional filter changes.
• Made in the USA: Manufacturing origin provides an assurance of consistent material and build standards for many buyers.

Who It's For

This product fits homeowners, renters, and apartment dwellers who need a higher-efficiency MERV 13 option with some odor control and who have a filter slot that accepts an actual depth of about 3.63 in. It is useful for people noticing dust, pet dander, or mild odors and who want a reasonably priced, single-pack alternative to bulk or specialized filters.

It is not for users whose systems require a true 4 3/8 in actual depth filter such as some Honeywell or Lennox units; those users should select a product specified for a 4 3/8 in actual depth instead. Also, customers wanting long multi-pack lifetime supplies may prefer bulk purchases or thicker 4 in versus 5 in filters for extended service life.

Pros & Cons

Pros

• High capture efficiency with a MERV 13 pleated synthetic media that reduces fine dust and allergens.
• Added activated carbon panel helps reduce household odors beyond particulate filtration.
• Clear actual size listing helps shoppers verify compatibility when they measure their filter slot.

Cons

• Actual dimensions are smaller than the nominal 20 x 20 x 4, and several customers report fit or thickness concerns if their unit requires a deeper actual depth.

Specifications

Brand	Nordic Pure
Nominal size	20 x 20 x 4 in
Actual size	19.5 x 19.5 x 3.63 in
Filter rating	MERV 13 (equivalent to MPR 2200-2400)
Media	Pleated electrostatically charged synthetic with activated carbon panel
Pack quantity	1 pack
Country of origin	Made in the USA

Our Verdict

The Nordic Pure 20x20x4 MERV 13 Plus Carbon filter is a solid choice for anyone who measures their filter slot and needs both particle capture and odor reduction in a single-pack format. It provides good value for the filtration level but requires attention to the listed actual dimensions to avoid compatibility issues with systems that need a deeper actual filter depth.

Frequently Asked Questions

Will this fit my existing 20 x 20 x 4 slot?
Measure your current filter and compare to the stated actual size 19.5 x 19.5 x 3.63 in; if your unit needs a true 4 3/8 in actual depth choose a different replacement.

How does the carbon layer perform?
The flat activated carbon panel helps reduce common household odors and VOCs but is not a specialized heavy-gas sorbent for industrial fumes.

How often should it be replaced?
Replacement frequency depends on use and environment; many households find checking every 1-3 months useful and replacing when visibly soiled or airflow is reduced.