Which house concept? Fundamental questions of house construction

Meant wood heating fed with own wood

Then it is annoying.

I meant wood heating fed with own wood

Yes, both.

The Isowood house in both Frechen and Cologne made a very pleasant impression on us. That would have been a viable option for us; however, we ultimately realized our house with a bit more effort and more detailed influence through local craft enterprises – timber construction, clay plaster, masonry heater, photovoltaics. We also liked Stommel Haus and Baufritz.

We visited Isowood over the weekend, and the concept as well as the price seem suitable so far. We also have an appointment for a factory tour and offer preparation at Stommel Haus. Baufritz was not yet on our radar. At Isowood, controlled ventilation was discouraged; they said they would sell/install it extremely rarely due to their advice. However, I am quite convinced of forced ventilation, especially at night in the bedroom, at least technically. Additionally, central vacuum systems were also discouraged, and the roof insulation was emphasized. Heating is recommended with geothermal energy using deep drilling.

It is nice that pretty much everything is included in the offer. From the construction site toilet to the insurances to the foundation slab, everything apparently rests on a solid foundation. Wall and roof construction also sound good, and they are flexible as well. The biggest questions then are the selection of the positions for supply lines, sockets, switches, the number and size of windows and roller shutters/venetian blinds... and I am not sure if you can really get decent tiles and parquet for 25€/sqm (we have good buyers).

Even if you can’t really compare all this, how do you think Baufritz and Stommel Haus compare to Isowood? If you didn’t know that controlled ventilation was installed, do you think you would still feel worse? We were told that the leaves of plants would dry out and fall off... but that’s just a matter of humidity, and if I have a modern system with an enthalpy heat exchanger, that’s no longer an issue! Perhaps also in combination with an earth air heat exchanger... and you can switch off the expensive thing anytime.

Isowood advised against controlled residential ventilation, as they would also sell/install it extremely rarely because of their consulting.

What reasons were given against controlled residential ventilation?
Would they do it anyway? If yes, at what price?

We were told that the leaves of the plants would dry out and fall off... a

Was that the statement from the Isowood consultant?

Does Isowood then install window rebate vents?

Why do leaves fall from plants?

What does the Isowood ventilation concept look like without controlled residential ventilation?
Window rebate ventilators or ventilation plan and multiple times a day shock ventilation

Is deep drilling possible at your place?

Sounds good if a lot is stated in the construction service description. Compare the construction service description with others and take a look around this financing area, then you should come to the full costs.
Tiles for 25 euros are okay, nothing special, sufficient for many rooms.
These are items where you can sink a lot of money no matter which manufacturer.

The stuff in the filters accumulates and has wonderful time to ferment, mold, and react there, which does not happen in the room air.

If you clean and replace the filters, the tube should stay clean.

The filters essentially hold back particles that cannot slip through due to their size – the rest is not necessarily more benign, sticks to burrs of transitions, corners and the like, accumulates there and waits for new mates. On the one hand, it reacts there with suitable passersby, and on the other, it accumulates into larger chunks and is eventually carried further by a "gust of wind." All this happens behind the filters in places that are difficult to clean. I strongly assume that the new broom, which sweeps well now, will be damned in ten years.