K-value updated by U-value

Date: 11 October 2001
Source: Veka
In autumn of this year the term "k-value" for the heat transition coefficient for windows and doors will be completely replaced by the term "u-value".

This change is simultaneously taking place with the introduction of the Building rules list 2001/ 2 from the German Institute for Building Technology (DiBt). The technical rules are especially important for people in the glazing and window branch, because they refer to the still valid heat insulation recommendation with the necessary calculation values of the heat transition coefficient for glazing UV and for windows and window-doors, including the Frame UF. In the quoted DIN V 4108-4 only the letter "U" replaces the letter "K", without the other international customary calculation methods. In addition there is confusion in regard to the indexes, the Europeans have a different written version and also a different meaning. Therefore here is a list of the co-relations:

kF = UF
kV = UV = Ug
kR = UR = Uf
UF + 0,1 bis 0,3=UW *

* Uw includes the influence of "cold bridges insulation glass edge/ connection systems". It is abbreviated with the letters (psi), as the "length related heat transition coefficient" (in W/mk) and is multiplied by the length of the glazing edge. The UV-value is an officially recognized calculation value, the so-called BAZ (federal indicator) value.

600450 K-value updated by U-value glassonweb.com
Date: 11 October 2001
Source: Veka

See more news about:

See more from these topics:

Others also read

The Spectus Vertical Sliding Sash is recognised as an industry leader not only in its authentic looks but also its performance and versatility.
Kolbe expands products and options with VistaLuxe complementary sliding patio doors and Madison handle sets.
LB Roof Windows has launched an exclusive new product with Liteleader a white painted roof window – offering builders, roofers, and installers the possibility to earn more margin on their projects.
Window and door system of the type “Harmonica” Е39.
Emplas has reported that it has now switched all new orders to Profile 22’s new Optima system ahead of manufacture from the beginning of July.
Stunning curved fenestration elements, supplied by Balconette, take full advantage of panoramic sea views at Art Deco-inspired seafront house at East Lothian on the north-east Scottish coast.

Add new comment