Genuine PuroAir 400 Replacement Filter - HEPA Filters Can Filter up to 99.9% of Smoke, Pollen, Dust, and Common Household Pollutants - HEPA Air Filter for PuroAir 400 - Air Purifier Filter Replacement

These are expensive, but they work really well at catching dust and they are so easy to remove/install. The purifier (Shark 4) is very quiet and has no smell to speak of. These are a very good replacement

I use it in my bedroom and I find that the replacement filters need changing too frequently. My bedroom is not in use for 18 hours a day so I wonder if I used it in a larger room how often would I have to change the filter. The filtering is fine with a new filter.

These filters are very easy to use you just open up the back of your filter and put them in not a problem at all. They do help collect the dust and other things they say they do. I’m very pleased with them. I also am pleased. They filter a large area.

This filter remove all odors. It is extremely easy to install and last up to 3 months when you take the time to vacuum its surface on a weekly basis. It collects dust effectively and improve the air quality tremendously. The noise level is very low.

Love the Puro air with great filters