A ventilated firestop is used when flues pass through floors its designed to offer a minimum distance to combustibles for fire and building control regulations. If going through another ceiling you will need to use another on the floor and also on the ceiling to ensure safe fitting.
White in colour
Flue Size 5″ (127mm) internal and 7″ (175mm) external
Flue Size 6″ (152mm) internal and 8″ (202mm) external
Stainless Steel or Matt Black
Only use 5″ flue pipe on a DEFRA approved stove with a 5″ vitreous flue pipe connection all other must be 6″ to comply with regulations