Review on 🔍 DerBlue 6PCS True HEPA Replacement Filter B for Holmes HAPF600, Improved Holmes Air Filter, Part # HAPF600, HAPF600D, HAPF600D-U2, White by Ronald Noel

I didn't realize I had to change these filters every year. I've hobbled around with my old ones for too long. Then, realizing that I could replace them at a reasonable price, I bought them immediately. They fit right into the slots, no hassles or issues. So there isn't much to say about them. It's not the "sexiest" product I've ever bought, but they do exactly what they're supposed to do with no fuss or hassle. I have defined a zero difference in expected operation. They are quiet and seem to filter the air like they should.