Tunal Sus Glazed In - Acoustic Window Ventilation Last verified by manufacturer over a year ago Viewing archived product data This product has been archived and is no longer available for project specification within NBS . Archived data may not reflect the manufacturer's most current version of the product. I am happy to view archived product data and understand that such data may not reflect the manufacturer's current version of the product. Confirm and view product data TunalSus 170-10 AW Louvers & Ventilation Ltd Variant: TunalSus 170-10