G – Ventrolla Perimeter Sealing Process (VPSS). The Ventrolla Perimeter Sealing Process (VPSS) comprises several draught-proofing things that operate collectively to seal your complete perimeter with the sash window. These include the sealing method installed previously mentioned the highest sash, possibly inside the sash alone or in some parting bead going through the https://agathaa753ari0.wikibyby.com/user