Nordic Pure 20x25x4 MERV 10 Pleated + Carbon Filter 2 Pack

Our review of the Nordic Pure 20x25x4 MERV 10 Pleated + Carbon 2 Pack finds it best suited for homeowners who want improved indoor air quality without heavy flow restriction. The biggest reason to buy is the combination of a MERV 10 pleated media fused to a carbon layer, which increases surface area and helps reduce odors while maintaining airflow. Measure your existing filter and compare to the listed actual size before ordering, because the nominal 20 x 25 x 4 label differs from the actual filter dimensions.

Key Features

• Actual size: The filter measures 19.5 x 24.5 x 3.63 in, so measuring your slot ensures a correct fit and avoids installation surprises.
• MERV 10 performance: The pleated media captures common household dust and particles while allowing reasonable airflow for most residential furnaces.
• Carbon layer: A fused carbon material is included to reduce odors and improve perceived air freshness without a separate activated carbon pad.
• Increased surface area: The dual-material construction creates roughly 33% more surface area for filtration, which helps extend life between changes.
• Made in the USA: Domestic manufacture gives clear provenance for shoppers who prefer locally made HVAC parts.

Who It's For

This filter is a good match for homeowners and renters with standard residential furnaces who want a balance of particle removal and odor reduction without moving to a very restrictive high-MERV filter. It works well in systems designed for a nominal 20 x 25 x 4 filter provided the actual 19.5 x 24.5 x 3.63 in dimensions fit the slot.

Those who need exact interchange with a Honeywell or Lennox 4 3/8 in deep filter should look at the alternative 20x25x5 option instead, since variations in actual depth between manufacturers can cause bypass or fit problems. Also, homes that require hospital-grade filtration should choose a higher MERV product specifically rated for those applications.

Pros & Cons

Pros

• Good balance of filtration and airflow from the MERV 10 pleated media.
• Carbon layer helps reduce household odors for fresher-smelling air.
• Made in the USA and designed with increased surface area for longer life.

Cons

• Actual thickness is 3.63 in which may differ from some systems expecting a 4 in or 4.38 in depth, so careful measurement is required.

Specifications

Our Verdict

The Nordic Pure 20x25x4 MERV 10 Pleated + Carbon 2 Pack is a practical choice for most homes that need reliable dust capture and light odor control without heavy airflow restrictions. It represents good value because of the fused carbon media and extra surface area, but buyers must confirm the actual 19.5 x 24.5 x 3.63 in dimensions fit their furnace to avoid bypass or fit issues.

Frequently Asked Questions

Are these true to size?
They are labeled nominally 20 x 25 x 4 in but the actual filter measures 19.5 x 24.5 x 3.63 in, so measure your existing filter before ordering.

How does the carbon layer help?
The carbon is fused to the MERV media to reduce common household odors and provide fresher-smelling air without a separate carbon pad.

Is this equivalent to MPR ratings?
Nordic Pure MERV 10 is equivalent to an MPR 1000 level of particle capture.