Ecologically built house with wooden facade - Features

Hello everyone,

I have been reading along in the forum for quite a while now, thanks to all members for the good tips and constructive criticism!
Now it is suddenly our turn and there is the possibility to acquire a plot of land with a house.
Since it is not quite an everyday property, I wanted to ask around what the forum members think about it.
Maybe you can help me better estimate what I’m getting into or what all is coming my way.
Information about the house:

[*]Year of construction 1996
[*]Timber frame construction
[*]Wooden facade, untreated Douglas fir
[*]Wooden windows double-glazed, no shutters
[*]Floorboards, also in kitchen/bathroom
[*]Oil heating, seller will still replace it with an air-to-water heat pump
[*]Final energy consumption according to certificate: 94 kWh/(m²a)

Attached are diagrams with wall/floor/roof construction.

Maybe someone has experience with the points below and can say something about them:

[*]Does a wooden facade have consequences beyond appearance and possible maintenance needs? Would this be a dealbreaker for someone?
[*]Can the wall/roof construction keep up reasonably with today’s standards? Compared to modern prefabricated houses, significantly less insulation material seems to be installed, and there is no installation layer. But is such a wall still better/more valuable than a solid house wall from the ’90s?
[*]The floorboards throughout the house worry me a bit; if you spill a glass of milk in the kitchen, you immediately have bigger damage, right? Does anyone have experience how it is to live with an (unsealed) floorboard floor in everyday life?
[*]I really miss shutters/blinds with the double-glazed windows, but I’m not sure if retrofitting makes sense with this year of construction or whether new windows including sun/insect protection are more reasonable.
[*]The planned air-to-water heat pump has a high flow temperature (70°C) and should thus also work with the existing panel radiators. Is there any reason against this? There is also a wood stove in the living room (not water-carrying or similar) for support.

Location and size fit so far, price should be a bit lower, but nowadays it is difficult anyway to determine what a property may/should cost ;)

I look forward to any answers and will try to respond quickly to questions,
Best regards and have a nice evening,
- Hausbaufaehig

Are you sure that together with the air-water heat pump, the energy consumption of 94Kwh/(m2a), the panel radiators and the 70-degree flow temperature you want to work and above all be happy? Because I think your electricity consumption will skyrocket.

The question is not what flow temperature the air-water heat pump can provide, but what flow temperature we need. If necessary, the radiators may also need to be replaced for economical operation. What was the oil consumption that year? Can the seller say something about the required flow temperature? Otherwise, would a pellet heating system be an option? It is less critical at high flow temperatures. How is the vapor barrier implemented? The facade is ventilated from behind, which is very good.

Thank you for the answers!

Are you sure that you want to work together with the air-water heat pump, the energy consumption of 94Kwh/(m2a), the panel radiators and the 70-degree flow temperature, and above all be happy? I think your electricity consumption will skyrocket.

Yes, I’m also not sure if it all makes sense... As mentioned in the previous post, the flow temperature doesn’t necessarily have to be that high, maybe 50° might already be enough?
A radiator replacement is not planned, but maybe that could be an option. It doesn’t seem to break the budget and perhaps the (de)installation can be done by ourselves?

The question is not what flow temperature the air-water heat pump can provide, but what flow temperature is needed. Possibly, for an economical operation, the radiators also need to be replaced. How high was the oil consumption per year then? Can the seller say something about the required flow temperature? Otherwise, would a pellet heating system be an option? It is less critical at high flow temperatures.

Background: The air-water heat pump has already been planned/ordered by the seller and is supposed to be installed within the next 1-2 months. The purchase price already includes the new heating system including installation.
Maybe I should ask the seller why the choice fell on an air-water heat pump and not, as mentioned, for example a pellet heating system. (There is space available due to the former oil tanks.) That must have been calculated at some point (possibly with the help of an energy consultant), right? On the other hand, maybe the seller is not that interested in the follow-up costs anymore...

How is the vapor barrier installed?

Phew, no idea. I will add the question to my list of questions for the seller and google what kinds of differences there are. Thanks for the hint!

The façade is ventilated, that is very good.

Glad to hear!

How high was the oil consumption in the year then?

I almost overlooked this part, sorry. According to the energy certificate, the energy consumption (heating oil EL) averaged over the last three years was about 13,000 kWh, of which about 2,300 kWh was for hot water. Then apparently about 1,600 kWh from firewood for heating. So I assume 13,000 kWh x 1L/9.8kWh = about 1,320 L of heating oil per year. For a living area of 124 m² / usable building area of 167 m², that seems pretty reasonable, doesn't it?

chosen quite that high, maybe 50° is already enough?

In this range, a heat pump works almost like an immersion heater - energy goes 1:1 into the heating. The question is rather whether 35-40 degrees are sufficient. As a maximum. 50 is a deal breaker for an (efficient) heat pump.