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DEFRA-certified for use in all in UK smoke control areas
Your hole needs to be a minimum 295mm diameter for 5" twin wall and 320mm for 6" twin wall
Its A+ energy rating and impressive efficiency rating of 80
Three air-controls (primary
Outstanding 81
Silvacore Pro by Duraflue Standard cowl: 5", 6", Silver, Black. #5to6 DEFRA-certified for use in allThis is a twin wall clip together chimney part used to build a new chimney. Twin wall clip together chimney can be as close as 5cm to combustible materials (7cm if passing through a sealed void). No glue or sealants required. When we say 5 or 6 we speak of internal diameter: outer diameter is 7. 5 and 8. 5 (192mm and 217mm). THIS PART REQUIRES A NARROW LOCKING BAND (NOT INCLUDED).