This European Standard specifies a method, based on EN ISO 8990 and EN ISO 12567-1,to measureTheThermaltransmittance of frame and sash components of windows and doors, including mullions and transoms.
EN 12412-2:2003 history
2003EN 12412-2:2003 Thermal performance of windows, doors and shutters - Determination of thermal transmittance by hot box method - Part 2: Frames