Compatible Devices: Filter Queen Defender 4000 Series

• Merv 17 HEPA Filters - Our high-efficiency HEPA filters stop 99.97% of airborne particles down to 0.03 microns small! Specially designed to catch allergens, dust, pet dander, and more. Perfect for smokers, pet owners, and those who suffer from asthma and allergies. MERV 17 HEPA filters are the same quality filters used in clean rooms and hospitals all around the world, so you can breathe easy knowing Breathe Naturally has got your back.
• We Recommend Changing HEPA Filters every 6-12 months with normal use and every 3-6 with heavy use
  • Heavy Use: Running your purifier constantly day and night, or if you have pets, etc.
• Breathe Naturally Satisfaction Guarantee - We pride ourselves on providing Premium Quality Replacement Filters at incredibly low prices. Your satisfaction is our #1 Goal, so please, if you're not completely satisfied with your purchase, send them back and we'll give you a full refund, no questions asked. Don't overpay for OEM brand filters when Breathe Naturally can guarantee you the same quality filters, if not better, for a fraction of the cost.