Installed under the deflector. Reduces airborne dust particles. Captures dust, pollen and other allergens. Prevent the spread of dust, mold spores and cat dander through the duct system at point-of-entry. Keeps dirt out of ductwork. Fits all standard register vent sizes. Fits standard wall or window air conditioning units. Cut the 8"x12" sheet to cover multiple vents. Contents are enough to cover up to 12 standard register vents. Simply cut to fit with scissors and install filter in air conditioner or vent. Replace approximately every 2 months.
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