GB-Gas Installation Volume Calculation Sheet.
A Tableised method to  to work out Installation Volumes / Leakage Rates /. and Purge Volumes available via gb-gas.co.uk... online training available. Working out installation volumes can create many chances to have errors. This new method reduces the chances, it helped me to be more accurate, hopefully it helps you the sheets are free to download via the website gb-gas.co.uk#IGEUP1B #gas #gb-gas.co.uk #acs @gbgas001