Another question.. the opening for the wall box will be about 150mm in diameter... do you need a lintel for that or can you just drill something like that into the exterior wall?
I just spoke with the plumbing company, they would do a core drilling for the exhaust wall box. But I now need to get one fairly quickly, they would then install it. I had been wavering between the Naber flowstar GTS 150, but the Weibel was also recommended here. Since I now need to get the wall box quite quickly, I also found this one at Bauhaus: also electrically controlled like the Weibel, and probably easier to obtain.
At least twice as expensive! Does it have to be electric?
It doesn't have to be. But there are many criticisms about Naber that the mechanics eventually stop working, for example, the opening eventually no longer closes. With electric, it should at least work as long as the motor doesn't break. There is also an electric solution from berbel for just under €400, which would probably also work.
But there are many criticisms about the Naber that the mechanism eventually stops working, for example the opening eventually no longer closes.
Has been running smoothly for me for about 1.5 years. Therefore, I cannot share the criticism (at this point in time). However, it only cost about €130.