The main suppliers are:Redbank we supply flue vent systems for chimneys which include fire backs right the way up to the pot. There are a vast amount of systems available with our depots only carrying a few and may vary from depot to depot. For any system that we do not have in stock can be ordered and delivered into our yard once a week. We can also send any plans away to have a take off done listing all parts required.Manrose supply a range of ducting and fan system that can be used throughout the house. A typical example would be a 4" fan and ducting system to vent an internal bathroom which can have a pull, timer or humidistat switch depending on the requirements. There are other systems available with in the Manrose range for different purposes so please ask in store. Timloc supply a range of venting systems for use when building a property that are used from the floor up to the ceiling. This covers Roof Vents, Eaves Vents in, Weep Vent, Fascia Vents, Air Bricks and Telescopic Vents with other products available.