Nordic Pure 20x25x4 Pleated Air Filters MERV 13 Plus Carbon - 6 Pack

Our review of the Nordic Pure 20x25x4 Pleated Air Filters MERV 13 Plus Carbon finds them best suited for homeowners who want improved indoor air quality without frequent replacement. The biggest reason to buy is the combination of a high filtration rating and an infused carbon panel that targets odors and volatile compounds while trapping fine dust. The review notes the importance of checking the filter's actual size versus the nominal size before ordering, as this model lists a nominal 20 x 25 x 4 but measures 19 1/2 x 24 1/2 x 3 5/8, which affects fit in some units.

Key Features

• MERV 13 filtration: Captures a wide range of airborne particulates including fine dust, pollen and some bacteria for cleaner home air.
• Plus carbon panel: An activated charcoal layer helps reduce household odors and some VOCs for fresher indoor air.
• Electrostatically charged media: Synthetic pleated material uses electrostatic attraction to improve particle capture without excessive airflow restriction.
• Actual size guidance: The filter measures 19 1/2 x 24 1/2 x 3 5/8 so customers are advised to measure their old filter for proper fit.
• Made in the USA: Manufactured domestically, which appeals to buyers who prefer locally produced HVAC parts.

Who It's For

These filters are intended for homeowners and renters with HVAC systems that accept a 4 in nominal filter where an actual depth of about 3 5/8 in will fit. They suit people concerned about airborne particles and odors who want a relatively high-performance MERV 13 option with an added carbon layer for smell control.

Customers who have units requiring an actual 4 3/8 in depth or who need an exact Honeywell or Lennox replacement should look at the alternate 20x25x5 option noted by the maker. Also, if a system requires a different nominal or actual size, measuring first is essential because there is reported variance in thickness and fit.

Pros & Cons

Pros

• High MERV 13 rating provides effective removal of fine particles and improves indoor air quality.
• Carbon-infused panel helps reduce odors and some volatile organic compounds for fresher air.
• Electrostatically charged synthetic media balances filtration with manageable airflow resistance.
• Made in the USA and sold in convenient multi-packs for value.

Cons

• Actual thickness is slightly under 4 in, so some users report fit or bypass issues if they rely on nominal dimensions.
• Occasional reports of unfiltered air bypassing the frame suggest careful measurement and installation are required.

Specifications

Our Verdict

The Nordic Pure 20x25x4 MERV 13 Plus Carbon 6 pack is a practical choice for people seeking stronger particle removal and odor reduction without frequent swaps. It offers good value and solid filtration performance for compatible HVAC systems, but buyers must confirm the actual 19 1/2 x 24 1/2 x 3 5/8 in dimensions to avoid fit issues. For those who need a true 4 3/8 in depth replacement, the alternative 20x25x5 option is a better match.

Frequently Asked Questions

Are these filters truly MERV 13?
Yes, the product is rated MERV 13 and is described as equivalent to MPR 2200-2400 in the product information.

What size should I order if my current filter is listed as 20x25x4?
Measure your current filter; this model's actual size is 19 1/2 x 24 1/2 x 3 5/8 in, so if your unit needs a deeper 4 3/8 in actual depth, choose the 20x25x5 option instead.

Will the carbon layer remove household odors?
The flat activated charcoal panel is intended to help reduce common odors and some VOCs, though performance varies with exposure level and filter age.