G – Ventrolla Perimeter Sealing Technique (VPSS). The Ventrolla Perimeter Sealing Technique (VPSS) comprises numerous draught-proofing components that do the job alongside one another to seal your complete perimeter of your sash window. These include things like the sealing system mounted earlier mentioned the top sash, both in the sash itself or in https://alcuinf172pes2.dekaronwiki.com/user