I recieved this humidfier as a Christmas gift. We have searched relentlessly for replacement filters, like everyone else I have been unsuccessful, in stores. However, there is hope for those that plan ahead. manufacter has replacement filters available. I would not let the not finding the filter in stores deter me from this product. I use this product daily and what a difference it makes. It is two feet from my bed a it doesn't interfer with telephone calls, tv, or sleep.