Nordic Pure 20x25x4 Pleated Plus Carbon Air Filters MERV 8 - 6 Pack

In this review the Nordic Pure 20x25x4 Pleated Plus Carbon air filter pack is evaluated for homeowners who need a reliable, budget-friendly replacement for standard furnace filters. The bottom line: these filters deliver solid dust capture and a mild odor control thanks to the fused carbon layer, and they are best for residential furnaces that accept a true 19 1/2 x 24 1/2 x 3 5/8 actual size. Measure the existing filter before ordering to avoid fit issues, as the manufacturer emphasizes actual versus nominal dimensions.

Key Features

• Actual size guidance: The filter lists both nominal and actual sizes so buyers can measure their existing filter and confirm a correct fit before purchasing.
• Dual material construction: The pleated MERV rated media is fused with a carbon layer to reduce odors while maintaining airflow for typical residential HVAC systems.
• MERV 8 performance: MERV 8 is equivalent to MPR 800, providing effective particle capture for dust and common household allergens without heavy flow restriction.
• 6 pack value: Sold in a six pack, the set provides multiple change cycles for better value compared with single filters.
• Made in the USA: Manufacturing origin is domestic, which some buyers prefer for quality control and supply consistency.

Who It's For

This product is aimed at homeowners and renters with standard residential furnaces or air handlers that accept a 20 x 25 x 4 nominal filter and whose actual filter space matches the stated 19 1/2 x 24 1/2 x 3 5/8 dimension. It suits those who want improved odor control over a plain pleated filter while keeping pressure drop low.

Those who should look elsewhere include users who need a deeper 4 3/8 actual depth replacement for certain Honeywell or Lennox models (they should consider the 20x25x5 option) and households requiring higher particle capture (such as immunocompromised individuals) where a higher MERV rating would be preferable.

Pros & Cons

Pros

• Good balance of filtration and airflow thanks to MERV 8 media fused with carbon for odor reduction.
• Clear actual-size labeling helps avoid fit mistakes when buyers measure their existing filters.
• Pack of six provides straightforward value for routine filter replacement schedules.
• Made in the USA, which may reassure buyers about manufacturing standards.

Cons

• Some customers report the actual perceived thickness and fit vary by furnace, so careful measurement is required to avoid gaps.
• Not suitable for systems that require a 4 3/8 actual depth filter or for users needing higher-than-MERV 8 filtration.

Specifications

Brand	Nordic Pure
Nominal size	20 x 25 x 4 in
Actual size	19 1/2 x 24 1/2 x 3 5/8 in (19.5 x 24.5 x 3.63)
MERV rating	MERV 8 (equivalent to MPR 800)
Pack quantity	6 filters
Special feature	Pleated plus carbon fused media for odor control
Made in	USA

Our Verdict

The Nordic Pure 20x25x4 Pleated Plus Carbon pack offers a practical upgrade over basic pleated filters for most homes, combining MERV 8 filtration with a carbon layer to reduce odors while keeping airflow reasonable. Buy it if your furnace accepts the stated actual dimensions and you want value in a six pack; measure carefully and choose a different depth if your unit needs the 4 3/8 actual thickness.

Frequently Asked Questions

Will this filter fit my furnace if the nominal size matches?
Measure your existing filter and compare to the stated actual size 19 1/2 x 24 1/2 x 3 5/8 in to ensure a correct fit, since nominal and actual sizes differ.

Is this suitable for odor control?
The fused carbon layer provides mild odor reduction compared with plain pleated filters, but it is not a substitute for dedicated carbon odor systems for heavy smells.

Should I buy this if my current filter feels thicker?
If your current filter has an actual depth of 4 3/8 in, order the 20x25x5 option instead, as this 20x25x4 measures 3 5/8 in actual depth and may leave gaps.