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Hello! Thank you for reaching out. This air purifier unit uses two replaceable filters, a HEPA-type filter and a carbon filter. On average, HEPA filters need to be replaced every 12-18 months. Carbon filters need to be replaced every 3-6 months. Filter life will vary depending on air quality and usage. For direct and immediate assistance, kindly give us a call at 1-800-253-2764. We're here for you Monday to Friday from 9:00 am till 6:00 pm EST. You can also contact us through chat and email by clicking this link: https://www.holmesproducts.com/customerservicecontact?cid=contactus. Our product specialists will be more than happy to help you.
Sorry, there was a problem. Please try again later.There are three HEPA-type filters. Each of those has a thin carbon filter attached to it. The HEPA filters can last a couple of years. The carbon filters need to be replaced once or twice a year, but they're cheap.
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