District heating KfW55 - KfW70 costs Ventilation system/Exhaust system

Secondly, because it is technically simple and therefore less prone to failure.

...and that could also be seen differently. At least one hole in the wall with control electronics and an EC fan in every room... versus a box in the basement, with one control electronics and two large fans (supply/exhaust air)... to me, the latter sounds less complex. Everything else is maintenance-free, except for the filters. And in the central case, you change them with a few simple steps in one place, whereas in the decentralized case you have to walk through the whole house...

And earlier above there was already a question about where the microbial contamination should come from. This question is still open and I would be very interested as well [emoji4]

...the ventilation system in a house is just as much or as little complex as the one in a car.

Only that is established and accepted by everyone!

Here too, I set the temperature once, in our case 22° all year round and I don't set it higher, the workshop changes the filters at intervals and that's that.

Why people resist so much when building a house is beyond my knowledge...

The additional costs of about €10,000 without savings effect.. Things like a huge garage are simply more important there.

A saving effect may be very individual to consider. Just as a suggestion: the time I save by not having to ventilate myself is available to me as free time and offers me a lot of tangible comfort - for me almost priceless, so maximum saving effect.

Furthermore: 2 people, both employed -> no chance to manually ventilate for the minimum air exchange. Saving effect: no worries about mold due to controlled residential ventilation, so it CAN really pay off quickly in case of damage.

For us therefore priority: mold protection, comfort.... energy recovery is actually not our motivation, but we take it with us because without it somehow feels half-baked for us...

Such a huge garage obviously has a savings effect!

Everyone of course builds for themselves and as they want...

Hmm.... build and save. Maybe some should better leave it. The building....