I have had my 400 series air purifier for several years now and I replace this filter about every six months. It is a good one to use if you want the best protection against allergens and dust. I have a cat and my daughter is allergic. I run the air purifier with this filter non-stop whenever I know she's coming to visit. It really makes a difference in her comfort level.
I would recommend this to a friend!
Written by a customer while visiting www.blueair.com
I love Blue Air Air Cleaners. I have 3- 200 series for bedrooms and a 400 series for the rest of the house. They are quiet and do a wonderful job. They are durable and have lasted over 15 years. The new 400 series has an improvement. The cord is hard wired into the unit. My old one the cord sometimes came loose from the base and fell off.
I would recommend this to a friend!
Written by a customer while visiting www.blueair.com