Window check: Are Ug and Uf okay for KFW55?

  • Erstellt am 2015-08-26 16:22:04

Legurit

2015-08-26 16:22:04
  • #1
Hello everyone,
quick question about the "State of the Art" of windows.
We have Ug values of 0.5 (I'm sure that's okay) and Uf values of 1.0. The lift-and-slide door has a Uf of 1.3, the front door also Uf of 1.3.
The combined Uw across all elements is 0.77
The whole thing is Kfw55 - is that appropriate? I believe it's similar in the energy saving ordinance for us.
Thanks for the quick feedback (I can't change it now anymore :D)
 

alexm86

2015-08-26 16:47:22
  • #2
The KfW calculation must include the value that the windows need to have.
 

Legurit

2015-08-26 16:51:18
  • #3
Yup, that's what it says, but I would have been interested to know if Uf of 0.8 is more standard today or so.
 

alexm86

2015-08-26 19:16:50
  • #4
We have windows for Kfw 70 houses with Uw (glass and frame together) of 0.8
 

Sebastian79

2015-08-26 20:12:36
  • #5
0.9 overall value for windows and 0.7 for the exterior door - KFW70.

But the question surprises me, because that is all stated in the thermal insulation calculation.

And as you can see, this alone has little to do with KFW55 or 70 ;)
 

Legurit

2015-08-26 21:24:11
  • #6
It was more out of interest, in our energy saving ordinance a Uf of 1.1 is stated, in the window calculation from the window manufacturer a Uf of 1.0 is stated. I take for myself that a Uf of 1.0 is a good middle ground.
 

Similar topics
19.01.2013KfW 70 - which roller shutters in the new city villa?10
12.05.2014KfW 70 without ventilation system107
10.07.2011Wall construction and insulation for Kfw 70 house, okay?19
07.10.2016Which heating is recommended for KfW 55?58
08.07.2012KfW 70 Ventilation / Exhaust System10
23.10.2016Thermal insulation, Energy Saving Ordinance, KFW 70 / 55 / 40 - Your experiences31
19.06.2015Build according to KFW 70 or the Energy Saving Ordinance 201442
09.07.2015Energy Saving Ordinance Proof vs. Energy Saving Ordinance Proof + KfW-70 Proof13
11.09.2016KfW - Construction supervision / verification / acceptance23
08.05.2016Renovation & Attic Expansion: KfW? Cost-effectiveness vs. New Construction?18
11.02.2017KfW loan in 2017 for a house under the 2016 Energy Saving Ordinance17
19.07.2017How can one circumvent the Energy Saving Ordinance and avoid bureaucratic madness?162
28.08.2018Window installation - sliding terrace doors long-term experience25
20.05.2018Energy Saving Ordinance for Summer Heat Protection12
24.07.2019Energy Saving Ordinance 2016 or KFW 55 for bungalow with air-water heat pump & controlled residential ventilation, optional photovoltaic47
09.09.2019Where is it most worthwhile to exceed the requirements of the Energy Saving Ordinance?14
29.01.2021Is the 2014 Energy Saving Ordinance a KfW standard?24
03.11.2020Single-family house with KfW55/controlled residential ventilation or Energy Saving Ordinance standard - experiences and opinions?22
03.03.2021Purchase single-family house new build energy saving regulation standard prospectively sufficient?24
04.03.2022Construction according to the Energy Saving Ordinance / GEG, assessment KfW5519

Oben