THERMAL TRANSMITTANCE
(UNI EN ISO 10077 / 1)The thermal transmittance coefficient indicates the level of energy (warmth/refrigeration) dispersed through the surface of the window. To determine this, the window’s specifications (thermal coefficient of double glazing, wood type, average thickness of frame/sash, inner and outer resistance) must be entered in a specific calculation program. The coefficient is expressed in W/m²K. The resulting number is directly proportional to the heat dispersed through the window.
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Doc Legno window art 92/92
BURNING OIL CONSUMPTION / WINDOW M2 SURFACE PER YEAR9 LITRES
INNER WINDOW FRAME TRANSMITTANCEUw=0,8W/m2K
Doc Legno window art 68/68
BURNING OIL CONSUMPTION / WINDOW M2 SURFACE PER YEAR11 LITRES
WHOLE WINDOW TRANSMITTANCEUw=1,4W/m2K
Doc Legno window art 68/2
BURNING OIL CONSUMPTION / WINDOW M2 SURFACE PER YEAR15 LITRES
WHOLE WINDOW TRANSMITTANCEUw=1,8W/m2K
Traditional window with simple glass
BURNING OIL CONSUMPTION / WINDOW M2 SURFACE PER YEAR50 LITRES
WHOLE WINDOW TRANSMITTANCEUw=4,5W/m2K
NATIONAL VALUES
PUBLISHED IN No. 39 GAZZETA UFFICIALE (15/07/2015).Maximum U thermal transmittance of transparent and opaque technical openings and of rolling shutter boxes, inclusive of fixtures, opening outwards and onto non climate-controlled spaces subjected to upgrading.
2015: 3,20
2021: 3,00
2015: 3,20
2021: 3,00
2015: 2,40
2021: 2,00
2015: 2,10
2021: 1,80
2015: 1,90
2021: 1,40
2015: 1,70
2021: 1,00
INDIVIDUAL REGIONS ARE FREE TO APPLY IMPROVED VALUES
E.G. LOMBARDY
Regional Decree no.6480 dated 30.7.2015
E.G. EMILIA ROMAGNA
Decree no.967 - 2015
24-7-2015 – Official Journal of Emilia-Romagna Region – Part II - No.184.
Maximum U thermal transmittance of transparent and opaque technical openings and of rolling shutter boxes, inclusive of fixtures, opening outwards and onto non climate-controlled spaces subjected to upgrading.
