The Tier1 20x20x1 furnace air filter carries a MERV 13 rating, which is equivalent to FPR 10 and MPR 1500-1900. This high-efficiency rating allows the pleated filter to capture airborne particles as small as 0.3 microns, including fine dust, pollen, pet dander, mold spores, smoke, and bacteria, making it an excellent choice for households with allergy sufferers or those seeking improved indoor air quality.

The nominal size of this Tier1 filter is 20x20x1 inches, with actual dimensions of 19.5" x 19.5" x 0.75". It is designed to fit any standard HVAC system, furnace, or air handler that requires a 20x20x1 air filter. Always verify your unit's filter slot size before ordering and install the filter with the airflow arrow pointing toward the furnace or blower.

Tier1 recommends replacing this 20x20x1 pleated furnace filter every 90 days under normal residential conditions. However, if you have pets, smokers, allergy sufferers in the home, or live in an area with high dust or pollen levels, replacement every 30 to 60 days is recommended to maintain peak airflow and filtration efficiency. Regular replacement helps protect your HVAC system and keeps energy costs lower.

This Tier1 20x20x1 filter features an electrostatically charged synthetic pleated media housed in a sturdy beverage board frame. The electrostatic charge attracts and traps microscopic particles that standard fiberglass filters miss, while the deep pleats provide increased surface area for greater dust-holding capacity and longer life without restricting airflow through your furnace or AC system.

Yes, this Tier1 20x20x1 MERV 13 furnace filter is a high-quality, cost-effective replacement comparable to premium name-brand filters such as Filtrete MPR 1500-1900, Honeywell FPR 10, and Nordic Pure MERV 13. Tier1 filters are manufactured to meet or exceed OEM specifications, delivering the same level of allergen and particulate reduction at a significantly lower price point.