G – Ventrolla Perimeter Sealing System (VPSS). The Ventrolla Perimeter Sealing Method (VPSS) comprises various draught-proofing components that perform alongside one another to seal the complete perimeter of your sash window. These include things like the sealing technique set up above the very best sash, either inside the sash alone or in certain https://johnniez467tvx9.dekaronwiki.com/user