G – Ventrolla Perimeter Sealing Process (VPSS). The Ventrolla Perimeter Sealing Technique (VPSS) comprises several draught-proofing aspects that get the job done alongside one another to seal the entire perimeter from the sash window. These consist of the sealing system installed previously mentioned the best sash, both in the sash by itself or https://eddiex716rip0.luwebs.com/profile