An integral concept for cleaning greasy ducts and extraction systems. TEGRAS eliminates the grease in industrial chimneys and kitchens, combining the action of a mechanical brush with the injection of active foam or warm water. It is totally automatic, easy to handle, compact, with a 30 metre hose to access difficult spots. The brushing mechanism spins to the right or left at the touch of a button on the control panel or the remote control. Its most important parts are built in stainless steel and it can be equipped with a pneumatic centraliser and a video inspection system which records on SD memory card.