ᐅ Technical room in the attic, issues with soundproofing?

However, this definitely does not replace the mechanical ventilation system, which – back to the topic – in my experience is also the loudest noise source among those mentioned here, especially since it runs continuously. We have a concrete ceiling and the mechanical ventilation system installed in the attic, decoupled and mounted on a specially built sand-lime brick wall. From a sound perspective, it’s acceptable – particularly when running on a low setting at night – but it’s not really ideal.

Most people I know who are involved with house construction and building services find ventilation systems quite terrible; they prefer to ventilate naturally by opening windows. I even know many who sleep with a slightly open window in winter, which is really not good from a building physics perspective, but in that case, installing a mechanical ventilation system with heat recovery might be unnecessary. I would recommend discussing this thoroughly with all family members in advance.

That was the case with my partner as well. At first, she was very enthusiastic about the idea of mechanical ventilation with heat recovery (especially because of the supposedly possible cooling function in summer). But when she learned that it doesn’t really make sense to keep the bedroom window open all night, it lost its appeal entirely (not to mention the cost). Dry air in winter was even less appealing. We are now planning without mechanical ventilation with heat recovery.

Golfi90 schrieb:

These are mounted on a wall made of tongue-and-groove boards, which I installed between two roof beams.

Is this a homemade setup for the condensing boiler? Have your installer and utility company approved it? The latter are usually very strict about the installation location of gas boilers. What do both say about accessibility? Out of curiosity: How did you run the gas line from the house connection to the condensing boiler in compliance with regulations? What does your insurance say about this type of installation regarding water damage? Do the buffer tank and expansion vessel have a drip tray? How is the heating system refilled—do you have a mains water connection in the attic?

Tolentino schrieb:

Initially very enthusiastic about the idea of controlled residential ventilation (mostly because of the supposedly possible cooling function in summer).

Cooling in summer is also possible with the heating system if the heat pump operates in reverse mode. It is probably still advantageous to install the heating pipes not in the screed but in the exterior walls. Has anyone read the book by Albert Ringlstetter? He discusses this in great detail.

Oh oh, there is some risky half-knowledge being used here. Even with a mechanical ventilation system with heat recovery, you can ventilate however you like. Permanently tilting the window open makes no sense because it causes a lot of energy (heat) loss. However, this has nothing to do with the ventilation system itself.

For us, nothing is better than a mechanical ventilation system with heat recovery. It provides fresh air constantly (which is not achievable through manual ventilation in new buildings), and it is especially comfortable during pollen season.

Dry air occurs in winter (or even right now) with or without mechanical ventilation. The advantage of a mechanical ventilation system with heat recovery is that it can recover moisture thanks to the enthalpy exchanger.