Lävel Uksetehas interior doors can be fitted with the ventilating automatic drop-down Planet door seal. A drop-down seal increases the door’s sound insulation. However, if a room has no supply and extract ventilation, or only supply air, a standard ventilation design provides for air to flow into the room under the door leaf (when the door is closed). With this product, in addition to sound insulation, transfer air can also flow under the door leaf – see the explanatory drawing below:
This product has a declared sound insulation of 27 dB and a transfer air flow of 200 m³/h.
More detailed information is available here:
