Replacing the filters in your Hunter QuietFlo Air Purifier will give you the maximum benefit and keep your machine running its best. Pre-filters should be changed about every 3 months or when the black filter is covered with a layer of white, fuzzy dust.The main HEPA filter should be changed approximately every year if the unit is run continuoualy as recommended. Wear a mask when changing filters for protection from this concentrated allergen collection.
Save when you buy 4 or more packs of pre-filters!
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