The Mini Rotorvent is a revolving anti downdraught chimney cowl designed to fit smaller flues and is also suitable for use on landfill sites and methane vent pipes Fits flues 80–180mm flue sizes Stainless steel rotor structure Pressure die cast aluminium base Revolutionary fin-fixing method which combines threading the fin through the collar of the structure and finishing with spot welding Stainless steel hookbolt fixings (smaller than Rotorvent) suitable for use on twin wall flue pipe Tested and certified under new regulation BSEN 16475-7:2016 and BSEN-1856-1:2003 For areas of consistently high wind speeds a static chimney cowl such as the Colt Top may be more appropriate.