Phresh filters offer the ultimate in air scrubbing!
Machine packed with 46mm RC-48 activated, certified virgin carbon to ensure maximum carbon density with less movement than other filters. These filters offer a cone shaped internal base for optimum air flow. The 51% open air custom mesh design helps make these filters half the weight of other filters. Sealed, bagged, boxed and shipped immediately after being manufactured for optimum life span, handling and presentation.
Phresh Filter 4" x 12", 200 CFM Videos
Fine if paired with a 6" fan Review by Monkey Allen
1. I feel like it was only effective for about 6 months
2. A 4" 200 CFM filter doesn't make a whole lot of sense because there aren't any 4" fans that can move an equal or greater volume of air, which is what you apparently need when pairing a fan and filter. To use this filter, you really should be using a 6" fan and a 4-6" reducer to make it fit. If you do that, then only the longevity of the product becomes an issue. I was under the impression these filters should last at least a year; however, I was growing a very stinky plant, so maybe the carbon absorbed all it could within that time period.
(Posted on October 2, 2015)