G – Ventrolla Perimeter Sealing Procedure (VPSS). The Ventrolla Perimeter Sealing Method (VPSS) comprises a variety of draught-proofing components that get the job done alongside one another to seal all the perimeter in the sash window. These involve the sealing method mounted previously mentioned the highest sash, possibly inside the sash itself or https://hilaryt962pyd7.blogitright.com/profile