Details above are the minimum and maximum manufacturing sizes of the roof vent.
The restrictions are due to the capacity/limitations of the opening mechanisms
For and on behalf of the Epwin Group of Companies -
Registered Office:
Manor Park Business Centre,
Mackenzie Way,
Cheltenham,
Glos GL51 9TX
Epwin Group Limited: Company Registration Number 3832221 England & Wales
S B P Limited: Company Registration Number 1268689 England & Wales
