Review on Veva HEPA Filter B Replacement and Carbon Pre-Filters Pack of 2 - Compatible with Germ Guardian Models AC4900CA, AC4825, AC4850PT, AC4820 - Air Purifier Enhancement by Dan Husband

I've been looking for replacement filters to fit my Germguardian AC4825E for a long time. This is not only PERFECT, but also the best deal I could find! The 8 activated carbon filters that you change when the lights come on mean it's time for a new one. 2 white HEPA filters last longer; They say to change it when it turns dark grey/black. I've only had to change the charcoal filter twice in the last year and I have two cats. I have yet to replace the white HEPA filter, but I'll have it when the time comes!