AeroStar 21 1/2x23 1/2x1 Air Filter
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At an actual 21 1/2" x 23 1/2" x 3/4", the 21 1/2 x 23 1/2 x 1 Aerostar fits a custom-spec nominal opening common in certain regional HVAC markets. MERV 8 covers standard household filtration: dust, lint, pollen. MERV 11 handles pet households and most common allergens. MERV 13 captures fine particulates including bacteria, virus-carrying droplets, and wildfire smoke - the grade to choose for households with respiratory health issues. Pleated synthetic media with an electrostatic charge built in
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