G – Ventrolla Perimeter Sealing System (VPSS). The Ventrolla Perimeter Sealing Technique (VPSS) comprises various draught-proofing elements that get the job done jointly to seal the whole perimeter of the sash window. These incorporate the sealing procedure mounted earlier mentioned the highest sash, both in the sash by itself or in certain parting https://jackiei690xuq8.anchor-blog.com/profile