Hello,
I am still searching for THE wall-mounted box for our exhaust duct.
The house is still under construction, KfW55 standard.
Of course, having an exhaust duct alone is already an energy loss, but we have already decided on this option (recirculation is not an alternative for us purely for hygienic reasons, even if it would be the Berbel model for 2000€).
Anyway, my current favorite is the wall box from Weibel (which is actually more of a flap than a box). I am also considering products from Berbel, Naber, and Miele. Based on Amazon reviews, I tend to favor the Weibel, although it is also the most expensive at 430€; but what are 200€ for a new build over a 20-year period...
Berbel BMK-L 150, 4.5 stars from 16 reviews, 320€
Miele DMK 150, no reviews, 240€
Naber CompAir STG, poor reviews, does not work well at low settings
Weibel WMK-Accesspoint-VA, 5 stars from 113 reviews, 430€ <-- best box
My kitchen installer usually supplies products from Naber. But I think most people don’t pay much attention to the details and sustainability here.
What I’m wondering now is: how can I best evaluate the thermal insulation of these boxes (in their closed, permanently sealed state)?
The fact is, there is a pipe designed as insulation that allows air connection to the interior. That is quite a good heat conductor and therefore a poorly insulated cross-section.
The only protection is the wall box or flap. But these aren’t very thick, while my exterior wall is nearly half a meter (20 inches) thick. Manufacturers all claim they are highly efficient and suitable for KfW55 and blower door testing. But I really can’t assess these advertising promises.
I hope someone here can provide some advice, tips, or pointers regarding this topic. I will also follow up directly with the manufacturers; maybe I’ll get some answers.
Thank you very much.
I am still searching for THE wall-mounted box for our exhaust duct.
The house is still under construction, KfW55 standard.
Of course, having an exhaust duct alone is already an energy loss, but we have already decided on this option (recirculation is not an alternative for us purely for hygienic reasons, even if it would be the Berbel model for 2000€).
Anyway, my current favorite is the wall box from Weibel (which is actually more of a flap than a box). I am also considering products from Berbel, Naber, and Miele. Based on Amazon reviews, I tend to favor the Weibel, although it is also the most expensive at 430€; but what are 200€ for a new build over a 20-year period...
Berbel BMK-L 150, 4.5 stars from 16 reviews, 320€
Miele DMK 150, no reviews, 240€
Naber CompAir STG, poor reviews, does not work well at low settings
Weibel WMK-Accesspoint-VA, 5 stars from 113 reviews, 430€ <-- best box
My kitchen installer usually supplies products from Naber. But I think most people don’t pay much attention to the details and sustainability here.
What I’m wondering now is: how can I best evaluate the thermal insulation of these boxes (in their closed, permanently sealed state)?
The fact is, there is a pipe designed as insulation that allows air connection to the interior. That is quite a good heat conductor and therefore a poorly insulated cross-section.
The only protection is the wall box or flap. But these aren’t very thick, while my exterior wall is nearly half a meter (20 inches) thick. Manufacturers all claim they are highly efficient and suitable for KfW55 and blower door testing. But I really can’t assess these advertising promises.
I hope someone here can provide some advice, tips, or pointers regarding this topic. I will also follow up directly with the manufacturers; maybe I’ll get some answers.
Thank you very much.
If the diameters from different manufacturers match, you can use any of them.
If they are rigid plastic pipes, they are suitable for outdoor use.
The overlap must be as long as the sockets of the pipe to be slipped over. With Weibel, you can find detailed dimension drawings for each product. Usually, other suppliers provide them as well.
It’s best to sketch it out once with the individual measurements, showing everything connected together along with the dimensions of the kitchen and the range hood.
If they are rigid plastic pipes, they are suitable for outdoor use.
The overlap must be as long as the sockets of the pipe to be slipped over. With Weibel, you can find detailed dimension drawings for each product. Usually, other suppliers provide them as well.
It’s best to sketch it out once with the individual measurements, showing everything connected together along with the dimensions of the kitchen and the range hood.