It is opened by the air pressure of the extractor system.

Robust, low-maintenance springs and joints ensure purely mechanical, reliable and quiet opening and closing. An electrical connection is not needed. It will not rattle even in strong wind.

The first wall conduct with guide vane technology, allowing the air to flow outside with little pressure loss, where an additional backpressure shutter is not necessary. The power consumption of the extractor connected and noise level will then be reduced.

It is greatly suited for energy efficient houses and energy-saving measures.

Its modern and elegant exterior design will match the expectation of modern kitchen planning and architecture.