The pre-filter covers the exterior of your purifier's filter to capture larger particles such as dust and hair. Pre-filters are an important way to keep your purifier working efficiently and to extend the life of your filter. For customers who prefer to replace dirty pre-filters instead of cleaning them, pre-filter 4 packs are ideal option.
Order by 2pm CST. Ships same business day.
There is no Forever Guarantee for Alen pre-filters.