Building a single-family house in NRW

But the feeling inside me is that the owners of controlled residential ventilation are some kind of new Jehovah's Witnesses faction, or Scientology with a fan attachment. And then it resists inside me. The little devil, the little evil Karsten demon, simply doesn't want to be converted.

*grins*

On the one hand, we want and have to build more and more energy efficient and often pay attention to the smallest leaks with door blower tests; on the other hand, we tear square meter-sized holes / preferably cross-ventilate / to expel heat in cubic meters from the house.

Oh, how beautifully efficient a house could be if it weren’t for the residents

I have a house without controlled residential ventilation because it was not structurally possible. I have a moisture sensor permanently installed in every room, and I am notified when I need to ventilate. Except after showering in the bathroom, everything has been within the green range so far – even in the bedroom in the morning, but I still ventilate in the morning. The air exchange is ensured through window rebate ventilators, and KFW 55 standards are still met. Controlled residential ventilation would certainly have brought me a bit more comfort but would not have saved much energy and certainly no costs. The amount of heat lost through air exchange is negligible. Nevertheless, of course, I would have chosen controlled residential ventilation if it had been possible, but the horror scenarios here are absolutely far-fetched. Home automation brings me a significantly higher gain in comfort. Just lying in bed on weekend mornings and slowly raising all the roller shutters with the smartphone without having to get up... or falling asleep unexpectedly and turning off all the lamps and lights at the push of a button without having to walk through the whole house... Nevertheless, it was possible to endure years in the old house without it.

I'm somewhat surprised that not even one of the established owners has had a germ test done after several years and disclosed the results, as this would be a strong argument based on the experience of several owners and even in their own interest. But correct me if I'm wrong, I haven't found anything except minor statements.

Why should one do that? Such a test is only done when needed, which I don't see here.

To the moderation, perhaps you could outsource the Controlled Residential Ventilation topic, it doesn't help Judith82 here IMHO.

Hello,

Now it's getting interesting.... kind of like energy efficiency and so on. How many watts does a controlled residential ventilation system have?

Count on about 100 watts running _constantly_. At least that's how it is with us. In other words, the electricity the system consumes (almost €20 per month) you can never save on gas. Not to mention the filters, which should be changed every 6 months. All in all, you easily end up with €250-300 operating costs for the controlled residential ventilation system per year.

A controlled residential ventilation system will never really "pay off" directly. It’s more about the gain in comfort, and possibly, a controlled residential ventilation system makes it possible to do without basement windows and solar thermal panels on the roof. We were able to omit exactly those thanks to the controlled residential ventilation system. So, in the end, the controlled residential ventilation system cost us less than €2000. And that comfort is worth it to me.

Another positive aspect is very often forgotten: I had really bad hay fever as a child and I really hope my children are spared from it. However, if they do get it, a controlled residential ventilation system with pollen filters is priceless!

Best regards,

Andreas

I think the thing with the pollen filter is great!! My son also has extreme hay fever! That is one of the reasons why I am actually in favor of it.

To the moderation, maybe you could outsource the controlled residential ventilation topic, it doesn't help Judith82 IMHO here.

Brief regards