KFW document/proof for Uw value (standard window)

Hello everyone,

maybe one of you can help me. My energy consultant needs a document from my window maker about the Uw value of the windows (standard windows), which in my opinion should be 1.20m x 1.48m. What does such a document look like or does anyone of you have one available so that I can give it to my window maker as a template? He doesn't know exactly what it should look like, he said he has never had to do that before. I am building Kfw 40 and this must be available. It should probably state that he installed the windows according to RAL and the Uw value of the windows. It would be great if someone could help me, I can't find a suitable document online. Thanks

the energy consultant has to give you that! he gets paid for it!

that has to be given to you by the energy consultant! he gets paid for that!

Not the energy consultant but the window maker! How do you come up with the idea that just any product information sheet can be used for profile+glass+size???

Not the energy consultant but the window maker!

How do you come up with the idea that any random product information sheet can be used for profile+glass+size???

The energy consultant demands something. So he should also provide the OP with a template of how it should look!

Period, end of work!

These are his homework assignments

The energy consultant specifies the U-value of the window construction.

Apparently, this is about the proof of execution.
Am I right ?

This proof can only be provided by the window manufacturer by forwarding/indicating the product information sheets of the installed components (including U-value if applicable).

Window manufacturers nowadays very rarely have their own profile systems. If they are actually dealers and installers, it comes entirely from the manufacturer. If they still assemble empty frames (or even profiles) and glass themselves, it comes from two sources. The total value must be calculated on a case-by-case basis because each window has a different frame proportion.