Fresh air in the living room
Effective ventilation
Stable and burglar-proof
Quick to use, locking in the sliding window
Rain protection - water runs off outside

Enjoy a little bit of fresh air without nature trying to join you with these sliding window vents. These vents are designed to fit with a perfect seal also helping to keep out the elements.
 
T6.1 window cutout size is H420mm x W445mm
T5/6 window cutout size is H450mm x W450mm