Germ Guardian FLT4825 HEPA GENUINE Air Purifier Replacement Filter B for GermGuardian AC4300BPTCA, AC4900CA, AC4825, AC4825DLX, AC4850PT, CDAP4500BCA, CDAP4500WCA and More, 1-Pack, Gray

Nothing

This is the third filter Ive used for my air purifier and They usually last a long time. I usually go 7-8 months before the purifier tells me it needs to be changed. The replacement times might be different for each house since dust levels might be different. I live in a very old dust prone house. They do a great job and every so often I vacuum off the dust thats accumulated on the back of the filter just to help make it last longer.

Description is correct for this product.

This product was easy to install in my air purifier. It definitely works to clean the air...just wish it wasnt so expensive!

Like it. works very good.

So please this filter is so easy to replace!

Correct fit and lasts a good amount of time

Great quality and perfect size!

To filter out the dog smell during winter I purchased an air filter which this product fits perfectly! This filter I am replacing every 4-6 months. Easy as pie!

I have a multiple cat household--to say the least. Although I have done all those expected things to reduce the odor of litter pans and pets, the air sometimes just needs to be refreshed. Ive accumulated three Germ Guardian air purifiers over time. One or all of them are always on. Two are on timers, the big one near the litter pans runs on lowest setting 24/7. The one in the bedroom is on a timer because I forget to turn it on when I go to bed. Im certain a percentage of it is the white noise, but physically, my eyes often feel sticky to actually a little crusty, and during spring and summer, my throat can be itchy when I wake up. Also, when I switched to an alleged low-dust plant-based litter, the dust was absolutely unbearable. A fine layer of powder settled everywhere in my house. I was miserable and ready to go back to a clay litter. The two filters in the main part of the house go a long way in reducing the dust in the air and on my furniture and floors, the reason why one runs 24/7 near the pans. However, in the years since I bought my first purifier, I have seen the charcoal layer of the filters get thinner--dont know if it changes the performance of the filter. I dont believe the white folded portion of the filters have changed much, but the charcoal layer has thinned considerably. I know this because I found an older filter that fell behind some cabinets in my garage and only recently pulled it out to use it and noticed how much thicker the charcoal layer is. Overall, I still recommend the filters and the purifiers for the longevity and effectiveness. I have all of the sizes on a six month subscription so when the new one comes in I just change them.