The Rotorvent Turbolite is the best quality, most effective revolving anti down draught cowl available on the market today. It will eliminate down draught issues as well as helping to increase draw up a chimney or flue. It is also suitable for use as a ventilator or on land fill sites to help remove gases. Colt Cowls Rotorvent Turbolite Advantages Superb quality Light in weight Tested and certified under new regulation BSEN 16475-7:2016 and BSEN-1856-1:2003 Simple installation. Comes complete with strap fixing kit option as well as hook bolts Product has been used regularly in temperatures from minus 20 °C to 250 °C Revolving bowl is made from high quality stainless steel Unique fin fixing system Suitable for all fuels Specifications Internal Flue Size: 80mm to 250mmMaterial: Stainless Steel