BS EN ISO 10077-1:2017 specifies methods for the calculation of the thermal transmittance of windows and pedestrian doors consisting of glazed and/or opaque panels fitted in a frame, with and without shutters.

This document allows for

• different types of glazing (glass or plastic; single or multiple glazing; with or without low emissivity coatings, and with spaces filled with air or other gases),
• opaque panels within the window or door,
• various types of frames (wood, plastic, metallic with and without thermal barrier, metallic with pinpoint metallic connections or any combination of materials), and
• where appropriate, the additional thermal resistance introduced by different types of closed shutter or external blind, depending on their air permeability.

The thermal transmittance of roof windows and other projecting windows can be calculated according to this document, 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 the annexes. 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.


Cross References:
ISO 10291:1994 (R10)
ISO 52000-1:2017
ISO 12567-2:200 (R09) Ed 1
EN 13659:2015
EN 12667:2001
EN 12664:2001
ISO 8302:1991
ISO 10292:1994
ISO 10077-2:2017
ISO 6946:2017
EN 675:2011
EN 674:2011
EN 12412-2:2003
ISO 8301:1991 Ed 1
ISO 10293:1997 (R08)
ISO 10211:2017
EN 13125:2001
ISO 10456:2007
ISO 7345:1987
EN 673:2011
EN 13561:2004
ISO/TR 52000-2:2017
CEN/TS 16628:2014
CEN/TS 16629:2014
ISO/TR 52022-2:2017


All current amendments available at time of purchase are included with the purchase of this document.