3 ms·
That's clever, but this [1] is already common and I guess not much worse? [1] https://www.ventilatieshop.com/terugslagklep-in-ventilatiekanaal-150mm/ https://w
by brnt 4y ago
That's clever, but this [1] is already common and I guess not much worse?
[1] https://www.ventilatieshop.com/terugslagklep-in-ventilatiekanaal-150mm/ https://www.ventilatieshop.com/terugslagklep-in-ventilatieka...
- nice__two 4y agoIt is much worse. The Berbel retains the insulation provided by the wall, when closed. This is nothing more than a fancy hole in the wall. Opening and closing, means you get the best of both worlds.