This International Standard specifies a method for calculating the thermal transmittance of curtain walls consisting of glazed and/or opaque panels fitted in, or connected to, frames.The calculation includes:different types of glazing, e.g. glass or plastic; single or multiple glazing; with or without low emissivity coating; with cavities filled with air or other gases;frames (of any material) with or without thermal breaks;different types of opaque panels clad with metal, glass, ceramics or any other material.Thermal bridge effects at the rebate or connection between the glazed area, the frame area and the panel area are included in the calculation.The cal
EN ISO 12631:2012 Referenced Document
EN 12412-2:2003 Thermal performance of windows, doors and shutters - Determination of thermal transmittance by hot box method - Part 2: Frames
EN 673:2011 Glass in building - Determination of thermal transmittance (U value) - Calculation method
EN 674:2011 Glass in building - Determination of thermal transmittance (U value) - Guarded hot plate method
EN 675:2011 Glass in building - Determination of thermal transmittance (U value) - Heat flow meter method
ISO 10077-1:2006 Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 1: General
ISO 10077-2:2012 Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 2: Numerical method for frames
ISO 10211:2007 Thermal bridges in building construction - Heat flows and surface temperatures - Detailed calculations
ISO 10291:1994 Glass in building - Determination of steady-state U values (thermal transmittance) of multiple glazing - Guarded hot plate method
ISO 10292:1994 Glass in building - Calculation of steady-state U values (thermal transmittance) of multiple glazing
ISO 10293:1997 Glass in building - Determination of steady-state U values (thermal transmittance) of multiple glazing - Heat flow meter method
ISO 12567-1:2010 Thermal performance of windows and doors - Determination of thermal transmittance by the hot-box method - Part 1: Complete windows and doors
ISO 6946:2007 Building components and building elements - Thermal resistance and thermal transmittance - Calculation method
ISO 7345:1987 Thermal insulation; Physical quantities and definitions
EN ISO 12631:2012 history
2017EN ISO 12631:2017 Thermal performance of curtain walling - Calculation of thermal transmittance
2012EN ISO 12631:2012 Thermal performance of curtain walling - Calculation of thermal transmittance (ISO 12631:2012)
EN ISO 12631:2012 Thermal performance of curtain walling - Calculation of thermal transmittance (ISO 12631:2012) has been changed from EN 13947:2006 Thermal performance of curtain walling - Calculation of thermal transmittance.