When you are using fans for growing plants inside you should regularly check the carbon filters for any clogging or damage and generally expect to replace them on a regular basis. Carbon filters can be fitted to large or small fans by using reducers, and the Ducting Reducers we stock are available in a range of sizes depending on, and related to, the size of your fans. A reducer is also useful if, for example, you have a large and powerful fan but you only want to make a small hole in your building's wall for air to go in and out. Whenever you decide to use reducers you should always check measurements carefully so you don't waste time and money by ordering the wrong size.
A useful connector for a range of carbon filters.
Durable and strong.