Review on Revolutionary Washable Permanent Electrostatic Venti Tech: The Ultimate Air Vent Cleaning Solution by Alan Massey

First time buying this product. Filters 14x20x1. This is my opinion and experience with this item. This may work for you, but I'm not happy with it. It was convenient to put it in the filter hole, and it was almost impossible to remove it from the oven after several months of use. The outer metal mesh covering the inner filter has changed shape and considerable force was required to remove the device from the furnace filter opening. I'm going back to the standard box 30 day filter.