This 1" pleated MERV 13 air filter is engineered for whole-house HVAC systems where indoor air quality is a priority. The MERV 13 rating captures the fine particulate that lower MERV filters miss - smoke, bacteria, virus-carrying droplets, fine dust, and most allergens - while the deep accordion pleats keep the pressure drop low enough that a typical residential blower can handle it.

• Nominal size: 20" x 20" x 1"
• MERV 13 rated per ASHRAE 52.2 - captures over 50% of particles down to 0.3 micron and over 85% at 1-3 micron
• Targets: smoke, bacteria, virus carriers, fine dust, pollen, mold spores, pet dander, lint
• Electrostatically charged synthetic media in a reinforced beverage-board frame
• Deep pleat geometry maximizes surface area to lower pressure drop and extend service life
• UL Classified for safety
• Replace every 90 days; sooner in heavy-use households (pets, smokers, wildfire smoke)

Tip: Nominal dimensions are about 1/2" smaller than the labeled size on each axis - that's intentional, so the filter slides into a standard 20x20x1 housing without binding. Install with the airflow arrow pointing toward the blower. Before stepping up to MERV 13, confirm your blower is rated for it; older single-stage furnaces can struggle with the higher pressure drop, so a MERV 11 may be the better long-term choice for those systems.

Use: Whole-house furnace and air handler return-air filtration; an upgrade for households with allergies, asthma, pets, or pre-existing respiratory concerns. Not designed for industrial or paint-booth duty.