Pack of 12 electrostatically charged air filters for protection of furnace and central air units
MERV 13 rating: removes household dust, pollen, dander, lint, smoke, smog, bacteria, lead dust and microscopic allergens
Pleated media provides large surface area for more effective filtration while keeping airflow resistance low
Each filter maintains efficiency for up to 90 days
Compatible with HVAC systems requiring filters sized 17.5" x 23.5"