ᐅ New construction with Poroton T7 MW 36.5 blocks without a mechanical ventilation system

@Knallkörper : As you mentioned, everyone can do it their own way. I’ve chosen mechanical ventilation with heat recovery: the advantages are regular air exchange, pollen filters, and no potential cold spots where warm air meets cold surfaces. Or are you suggesting that in winter, when cold air passes through the ‘missing’ seals, the windows don’t get cold in those spots? Besides, if I do something, it should meet current standards and consume as little energy as possible. And what disadvantages does mechanical ventilation have, apart from costing 3-4 thousand dollars?

I have received some quotes so far, and I am looking at around 10,000 to 12,000 (units).

Tom1607 schrieb:
@Knallkörper : what disadvantages does a mechanical ventilation system have besides costing 3-4k dollars??

-The “peanuts” for mechanical ventilation don’t concern me much; today, even a cold roof costs an extra 3-4k dollars because it no longer fits current trends.
-I’m also not too worried about energy consumption since I have my own forest (of course, this is not applicable to the general public).
-Professionally, I work with building technology and ventilation systems, so I know how these devices and ducts look inside after 10 years (commercial buildings). For principle reasons, I don’t want that in my home either (also not generally transferable).
-Anyway, these systems require maintenance, which means I have to take care of it, causing stress and mess.
-From my point of view, the systems are not hygienic enough. Although I have hay fever, I prefer pollen from outside air over the bacteria and mold spores from mechanical ventilation.
-The systems are not silent; nowadays, sound insulation is very important, and it is also very important to me personally, yet people still install ventilation systems in their homes. In our neighborhood, as far as I can tell, no one has a mechanical ventilation system. (If a neighbor did, I would immediately hire an acoustic consultant to perform a relevant sound power measurement and enforce a cease and desist order if the permitted level according to TA-Lärm is exceeded.)
-The system including the ductwork takes up space.
-The aesthetics suffer both inside and outside (this is also my personal impression).

How can ventilation or air exchange be ensured in a modern, highly insulated house?

We both work full-time and in the mornings neither have the desire nor the time to ventilate, and in the evenings only the living room and bedroom are usually aired out. The children's rooms are currently ventilated once a week.

Good evening,

I should know better from long experience, but I’ll give it a try anyway...

Knallkörper schrieb:

-From my point of view, these systems are not hygienic enough.

You know all suppliers – outside of commercial use?

Knallkörper schrieb:

Although I have hay fever, I prefer pollen from outdoor air over bacteria and fungal spores from controlled residential ventilation.

You have about 2 kilograms (4.4 pounds) of bacteria in your body; without them, you would be dead long ago.

Knallkörper schrieb:

(If my neighbor had one, I would immediately hire an acoustics firm to do a sound power measurement and, if the allowed limit according to TA Noise is exceeded, enforce a cease and desist.)

You perfectly fit the cliché I have in my mind; what a pity.

Knallkörper schrieb:

-The system and pipes take up space

Is it space that you’re missing?

Knallkörper schrieb:

-The appearance suffers both inside and outside (also my own impression)

Nope.

Regards, Bauexperte

I am planning a mechanical ventilation system with heat recovery because I’m tired of freezing in winter when I’m in the bathroom after a shower but have to keep the window open to ventilate. I also don’t want to sleep in stale air anymore, and to get rid of the musty smell.

Whether the mechanical ventilation system is really necessary because the house would otherwise deteriorate… no idea. That’s what the manufacturers say.