A few years ago I was remodeling our house and wanted to do something about our cats litter box odor. I have always loved animals, but to tell you the truth the litter box odor was something I could live without. Our cats are mainly inside so eliminating the litter box all together was not an option. I thought, tinkered and came up with a solution, although crude at the time; it was the predecessor to the current Whisker Vent. Over the past few years I have refined the system and have developed a compact, quiet and very efficient way to eliminate litter box odor. Utilizing a DC brushless fan motor the Whisker Vent has a continuous flow of air from your Litter Box opening, through a fan motor assembly and then exhausted through a Whisker Vent filter, or a flexible vent hose utilizing either a vent tube (barrier venting), or window insert (window venting). Whisker Vent will eliminate the Litter Box odor, leaving fresh air for you and your cat. Whisker Vent also greatly reduces bacteria build up inside the Litter Box leaving a "clean" Litter Box for your cat. Utilizing a DC brushless fan motor Whisker Vent can run 24 hours a day 7 days a week without concern. The fan is very quiet and efficient. You will not even know it is running. In-line vent hose extension with adapter, 6 ft.