Reducers from are the perfect fitting to use when you need to change from one size duct to another size. Reducers are manufactured from the highest quality galvanized steel or blow moulded plastic. They are perfect fittings for maintaining maximum airflow through a system while changing to the needed duct size. Reducers are useful for fitting fans, filters & silencers to other various sized pieces of equipment, for example you would be able to connect a 200Ø ducting to a 250Ø fan. A reducer will help you do this.
To install Reducers, you simply slide the reducer into or over the item you are attaching to and fasten with sheet metal screws or duct tape.