Single-family house U-values good or rather not?

Hi self-builders community,

are these U-values good or rather not so good for our new 110sqm single-family house?

Exterior wall: Lambda 0.09 W/mK
Ceiling attic: 0.17 W/m²K
Roof: 0.17 W/m²K
Floor slab: 0.24 W/m²K
Front door: 1.8 W/m²K
Windows: 1.06 W/m²K

What would be the usual category you would roughly be classified in with these values? KFW 100, 70, 55, or 40?

Good evening,

What would be the usual category in which one would roughly be classified with these values? Kfw 100, 70, 55 or 40?[

What are you hoping for, or what has your provider promised you?

Rhenish regards

Good evening,


What are you hoping for, or what has your provider promised you?

Rhenish greetings

Good evening as well,

I know that the KfW is not really meaningful when it comes to the actual heating costs, the provider confirmed a Kfw55 for us with these values.
However, that does not necessarily mean that it is "well" insulated, so I am hoping for some comparative values, in other words, whether I am doing quite well or if the insulation leaves something to be desired despite the "KFW 55 package."

I know that the KfW is not really meaningful when it comes to the actual heating costs, the provider confirmed a KfW55 for us with these values.
But that doesn't mean it has to be "well" insulated, so I hope for a few comparison values to see whether I'm doing quite well or whether the insulation leaves something to be desired despite the "KfW 55 package".

How do you come to the first statement about the actual heating costs?
For me, it was always that with e.g. 55, you only consume 55 out of 100 energy for that house.
Your house supplier guarantees you KfW-55, or you order it... in the end, does it not ultimately not matter how the values break down?

Hello,

aside from the fact that it would be more than careless to give an answer based on the following data

Outer wall: Lambda 0.09 W/mK
Ceiling attic: 0.17 W/m²K
Roof: 0.17 W/m²K
Ground slab: 0.24 W/m²K
Front door: 1.8 W/m²K
Windows: 1.06 W/m²K

I would - subjectively - tend to classify these data as a normal single-family house according to the Energy Saving Ordinance.

... the provider confirmed a KfW55 with these values.

This would - in my experience - only work with the appropriate technology and only to the extent that it is subject to a reliable calculation.

Which heat generator did your provider promise you in the offer/contract?

And btw. - as a supplement to my post - the above values say nothing about the final efficiency value of the single-family house. But - if your provider has assured you "in writing" to deliver a KfW 55 efficiency house, he is also obliged to do so.

Rhenish greetings

Hello,

aside from the fact that it would be more than reckless to respond to the following data


I would - subjectively - tend to consider these data indicative of a normal single-family house, according to the Energy Saving Ordinance.


This would - in my experience - only work with appropriate technology and only insofar as it is subject to a reliable calculation.

Which heat generator has your provider assured you per offer/contract?

And btw. - as a supplement to my post - the above values say absolutely nothing about the final efficiency value of the single-family house. But - if your provider has "assured" you in writing to deliver a KfW 55 efficiency house, he is obliged to do so.

Rhineland greetings

Since a KfW 55 house was ordered turnkey, it is of course assured in writing ;-)

Heat generator:
Gas condensing boiler: Viessmann Vitodens 300
System control: Vitotronic 200
Solar 5 sqm: Vitosol 200-F
Solar storage: Vitocell 100-W 300 liters

Technology:
Gas condensing boiler with solar for hot water
Underfloor heating in all rooms
Decentralized ventilation Lunos e² with 90% heat recovery

To explain the statement about KfW and effective heating costs again:
The primary energy demand depends on the chosen heating system, so you can artificially "beautify" it by, for example, calculating with a pellet stove.


That the house is insulated like a standard Energy Saving Ordinance cabin is, of course, not so cool for me :/