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Thermal performance of windows, doors and shutters — Calculation of thermal transmittance — Part 1: General
ISO 10077-1:2006 allows for the following:
The thermal transmittance of roof windows and other projecting windows can be calculated using ISO 10077-1:2006, provided that the thermal transmittance of their frame sections is determined by measurement or by numerical calculation.
Default values for glazing, frames and shutters are given in ISO 10077-1:2006.
Thermal bridge effects at the rebate or joint between the window or door frame and the rest of the building envelope are excluded from the calculation. The calculation also does not include effects of solar radiation, heat transfer caused by air leakage, calculation of condensation, ventilation of air spaces in double and coupled windows and surrounding parts of an oriel window.
ISO 10077-1:2006 does not apply to curtain walls and other structural glazing and industrial, commercial and garage doors.
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