Review on FLT4825 HEPA Filter B: Compatible with GermGuardian AC4825 / AC4825E / AC4825DLX, AC4300BPTCA / AC4850PT - Advanced Technologies for Home Air Cleaner Purifiers, AC4900CA, CDAP4500BCA by Leo Black

It's amazing how much trash gets filtered out of the air in my house! I rely on my germ monitor to keep my bedroom as allergen-free as possible, and I often bring it into the kitchen when I'm making onions! The red filter change indicator lights up around the same time every year and it's very easy to find and reorder a filter in my history. The new filter came the next day. I put it in, pressed the reset button and Alt. What I didn't realize was that I had to replace it about every nine months instead of 12 and that I could vacuum it up for better performance. I'll see if I can subscribe to Revain and save up so it just shows up and I don't have to miss a day. This is efficiency for the 21st century!