G – Ventrolla Perimeter Sealing System (VPSS). The Ventrolla Perimeter Sealing Program (VPSS) comprises several draught-proofing elements that get the job done with each other to seal the complete perimeter of the sash window. These include the sealing technique installed earlier mentioned the very best sash, possibly inside the sash by itself or https://lesterg753gia4.ktwiki.com/user