Grand-Ducal Regulation amending the energy performance of buildings (2008)

U values for thermal envelope W/(m2k):

 

walls:

• external: 0.32


• very little heated premises: 0.50


• surfaces in contact with the ground or not heated premises: 0.40

roofs:

• external: 0.25


• very little heated premises: 0.35


• surfaces in contact with the ground or not heated premises: 0.30

windows:

• external: 1.5


• very little heated premises: 2.0


• surfaces in contact with the ground or not heated premises: 2.0

doors:

• external: 2.0


• very little heated premises: 2.50


• surfaces in contact with the ground or not heated premises: 2.5

Skylight:

• external: 2.7


• very little heated premises: 2.7

surfaces in contact with the ground or not heated premises: 2.7