Insulated glass unit 1m2 double glazed

Data quality: Time representativeness: The production year used in this LCA is 2023. The Ecoinvent version 3.9.1 database was used to represent energies, and wastes arising. This version of Ecoinvent was issued in March 2023. The main raw materials’ production data is from 2023 production. Time representativeness is thus assumed to be ‘Very Good’. Geographical representativeness: Data is from the area under study (Europe), where all the raw materials come from western Europe. The geographical representativeness is thus assumed to be ‘Very Good’. Technical representativeness: Data is from the processes and products under study. The same state of technology that is used by Carey Glass is that defined in the goal and scope. The processes at Carey Glass use electricity and diesel. The electricity record is for electricity generated by a mix of renewables and fossil fuel resources, plus own solar PV system. For the glass, there are two sources of EPD data: (1) Coated glass data is from a manufacturer-specific glass EPD of a production-weighted average of six coated glass products, from production locations in Europe. The market of applicability of these EPD is Europe. The primary data on this glass raw material is for the 2021 calendar year. (2) Clear Glass is from a manufacturer-specific and product-specific glass EPD for clear glass. The market of applicability of this EPD is Europe. The primary data on this glass raw material is for the 2021 calendar year. The technical representativeness is thus assumed to be ‘Good’. Allocation: The measurement of environmental impacts in this EPD uses the LCIA methodologies recommended for PEF 3.1. In this EPD, the waste processes are allocated in the relevant module. In the case of the use of secondary materials or energy recovered from secondary fuels, the system boundary between the system under study and the previous system (providing the secondary materials) is set where outputs of the previous system, e.g. materials, products, building elements or energy, reach the end-of-waste state. The modularity and the polluter payer principles have been followed. Cut-off criteria: All relevant inputs and outputs - like emissions, energy and materials - have been taken into account in this LCA, and in accordance with EN15804+A2:2019. The study covers at least 95% of the materials and energy per module and at least 99% of the total use of materials and energy of each unit process. Long term emissions have been excluded from the study.

the glass sheets are 6mm thick, and have a density of of 2,500 kg/m3. The void separating the two glass sheets is 20mm thick and is filled with argon gas. The U-value of the insulated glass unit is 1.1 W/m2.K.

The insulated glass unit comprises one sheet of clear flat glass, one sheet of coated flat glass, filled with argon gas in the void. The unit is sealed with primary and secondary seals, and the glass sheets are separated and held in place by a spacer. The insulated glass unit is used as external and internal glazing in commercial and public sector buildings. The insulated glass unit is manufactured to the following technical standards: • Thermally toughened soda lime silicate safety glass according to EN 12150-1:2015+A1:2019 (for toughening individual glass panes). • Insulating glass unit according to EN 1279-1 (for assembly of final product).