Nordic Pure MERV 12 HVAC Replacement Air Filters 20x25x5 (Actual 19.88x24.88x4.38) 2-Pack — Electrostatic Pleated Filters

These Nordic Pure pleated filters are built with electrostatically charged synthetic media and a sturdy beverage-board frame backed by a bonded metal mesh, designed to capture fine particles while resisting moisture and microbial growth. Rated MERV 12 (comparable to MPR 1500–1900), they are intended as direct replacements for many Honeywell/Lennox housings that accept a nominal "20x25x5" filter but actually require the smaller actual dimensions. Because many furnace filters use nominal sizing, we emphasize measuring your current filter or slot before ordering to ensure a snug, effective fit.

How do these filters differ from the printed nominal size?

Many furnace filters list a nominal size that is slightly larger than the filter’s true measurements. Nordic Pure labels this model as 20x25x5 nominal, while the actual dimensions are 19 7/8 x 24 7/8 x 4 3/8 inches—equivalent to many filters sold as 20x25x4 by other manufacturers. Measuring your existing filter or the housing prevents fit issues.

• Nominal size: 20 x 25 x 5; actual: 19.88 x 24.88 x 4.38 inches.
• Works as a replacement where the real depth is about 4 3/8 inches.
• Check your filter slot or old filter before purchasing.

What level of particle filtration can I expect from MERV 12?

MERV 12 filters provide high-efficiency filtration suitable for trapping many fine airborne particles, including dust, pollen, smoke fragments, and some biological particulates down to about 0.3 microns. While they capture a wide range of contaminants and help reduce particulates circulating in your home, they do not sterilize air or claim to eliminate pathogens.

• Comparable performance to MPR 1500–1900 ratings.
• Electrostatic media attracts and holds small particles effectively.
• Media resists bacterial and mold growth without added chemicals.

How often should I change these furnace filters and why?

Filter lifespan depends on local indoor and outdoor conditions, household activity, and whether renovations or heavy dust are present. For most homes, replacing the filter every 3–6 months balances clean airflow and cost-effectiveness; homes with pets, smokers, or allergy sufferers may require more frequent changes.

• Typical recommendation: change every 3–6 months.
• Replace sooner during construction, heavy pollen seasons, or high indoor dust.
• Regular changes keep HVAC systems running efficiently and reduce maintenance needs.

What are the construction and material benefits of this Nordic Pure filter?

Nordic Pure uses an electrostatically charged synthetic filter media combined with a moisture-resistant beverage-board frame and a bonded metal support grid. This construction helps the pleats maintain shape under airflow, reduces the chance of sagging, and avoids adding biocidal chemicals to the media while limiting microbial growth.

• Heavy-duty, moisture-resistant beverage board frame for durability.
• Metal mesh bonded to pleats adds structural support.
• Electrostatic synthetic media traps fine particles without chemical additives.

Who is this product for? Homeowners or building managers seeking a high-efficiency replacement filter that fits systems labeled 20x25x5 but requiring slightly smaller actual dimensions will appreciate this Nordic Pure MERV 12 two-pack. It’s especially suitable for those who want improved particulate capture (allergy-conscious households, pet owners, or anyone wanting cleaner indoor air) while maintaining HVAC efficiency. Confirm your filter slot measurements before ordering to ensure correct fit and peak performance.