G – Ventrolla Perimeter Sealing System (VPSS). The Ventrolla Perimeter Sealing Program (VPSS) comprises a variety of draught-proofing elements that get the job done alongside one another to seal your complete perimeter from the sash window. These involve the sealing method set up earlier mentioned the highest sash, possibly within the sash itself https://elderj789snh4.wikiitemization.com/user