Optimal temperature insulation.

Hermetically sealed by an optimized built-in heat retention system.

Flat stainless steel cover with minimal effect to the aesthetics of the building exterior facade.

Weatherproof stainless steel louvres.

3-times insulating Backflow system.

Magnetic opening and closing.

Defined opening pressure (65 Pa) prevents rattling.

Full opening even at low flow rates.

Telescopic wall duct 350 - 500 mm for round pipe connection piece DN 150.

Conform to blower-door test.