ᐅ Mounting the ventilation ducts of the controlled residential ventilation system on the flat duct manifold

I cannot imagine that any manufacturer would specify or even approve this. The later cleaning alone (which will eventually be necessary) could become problematic – especially if brush attachments are to be used, for example.

I see it the same way you do. To be honest, I didn’t fully understand it at the time of installation; otherwise, I would have acted immediately. What’s alarming is that this apparently seems to be the standard practice of the company. As far as I know, different systems are actually intended for the mounting. Unfortunately, I don’t know the manufacturer, so I’m somewhat in the dark about whether this is truly completely unacceptable.

Regarding hygiene and cleaning, I agree with you as well. Since there have already been so many issues between my general contractor and me, and I don’t want to risk further construction delays, I will bring this up for final inspection by having the expert evaluate it on their checklist (after all, it can’t be changed anymore).

I think the screws could be cut off using a rotary tool with a flexible attachment, but it can no longer be fully remedied. What was originally a smooth-surfaced pipe now has at least two spots at every inlet and outlet where dirt, dust, and worse can accumulate. I find this really concerning with two small children in the house. This creates an increased, ongoing cleaning effort for the system that shouldn’t have been necessary.

In the end, I also consider a price reduction justified that corresponds to the additional cleaning effort required. Or am I being too “fussy” now?

i_b_n_a_n schrieb:

I can see them now too, strange. The forum sometimes does strange things...
At first glance, this does not look compliant to me...

Usually, there are rings or seals that fit around the pipes and then "click" into place at the right position. This seals and secures the pipe to the valve or manifold.

I'll ask...

Nothing more to add.
Normally, a seal is placed around the round pipe to create a watertight connection between the flexible hose and the manifold, which either locks into place (I had to press it down a bit). A double protection could be heat shrink tape to ensure nothing gets into the pipe.
Has the ceiling already been cast, or is there still a chance for repairs?
Remove the screws and seal the holes with heat shrink tape.
I installed my controlled mechanical ventilation system myself.
Ask the general contractor for the manufacturer; they must provide you with that information or carry out the work according to the installation manual.

Stephan— schrieb:

There is nothing to add to that.
Usually, there is a gasket around the round pipe that seals the flexible hose and the manifold together and either snaps into place (I had to push it down a bit). A double protection could be cold shrink tubing to ensure that absolutely nothing gets inside the pipe.
Has the concrete slab already been poured, or is there still a chance for repair?
Remove the screws and seal the holes with cold shrink tubing.
I installed my own mechanical ventilation with heat recovery system.
Ask the general contractor for the manufacturer; they must tell you or follow the installation instructions when carrying out the work.

The screed is going in now, so the opportunity is gone.
No concrete slurry has entered any of the pipes. I bought an inspection camera and will check all the pipes over the weekend. Looking forward to the next argument with the association… :-(

Edit
PU foam was used to seal in my case.

Check the end face to see if it says “Fränkische” there. I think I found them, and they are called Fränkische Profi Air Classic. According to the installation sheet, the pipes are only pushed in and not additionally secured (but please read it yourself to be sure).

Stephan— schrieb:

Check the end face to see if it says "Fränkische" there.
I believe I found them and they are called Fränkische Profi Air Classic. According to the installation sheet, the pipes are simply pushed in and not additionally fixed (but please double-check yourself).

Thank you very much, these are indeed the components installed in my setup. I will contact the manufacturer by email and request information on the correct installation.