Stainless steel self-acting closing flap

for PE-HD pipes

With the external corner

Flame retardant according to DIN 4102-B1

The gutter is fed undivided through the socket

Marley Air 4.0 Frischluft-wärmetauscher Stainless steel self-acting closing flapThe Marley Air 4. 0 a decentralized ventilation unit made in Germany with heat recovery of up to 80%. It impresses with particularly low operating noise and high performance with low consumption (energy efficiency class A). Tool free maintenance makes the Air 4. 0 the perfect solution for do it yourself installation. Fresh and healthy indoor air at all times and protection against mold growth: Decentralized systems for controlled domestic ventilation