Air-In® Overframe gap valves are Finnish supply air valves installed in the gap between the window and the wall. The Air-In Overframe gap valve consists of an Air-In frame valve and a lead-through housing.
The overframe gap valve is often a good option for renovations as it can be easily installed in the existing overframe gap. No structural changes are required. The required minimum installation height is 12 mm.
Air volume = K factor x √pressure
|Product||Air volume l/s
(pressure 20 Pa)
|Draught-free air volume||Noise reduction dB
|Opening size mm|
|Air-In 400 dB TR 130||7||6||400x12|
|Air-In 400 dB TR 170||7||6||49||400x12|
|Air-In 600 dB TR 130||8||7||600x12|
|Air-In 600 dB TR 170||8||7||46||600x12|
|Air-In 400 dB TR 130 Super||7||6||440x25|
|Air-In 400 dB TR 170 Super||7||6||51||440x25|
|Air-In 600 dB TR 130 Super||8||7||640x25|
|Air-In 600 dB TR 170 Super||8||7||50||640x25|
Frame depth 130 or 170 mm
Also available for other frame depths; please indicate in the order.