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General comment The values determined to calculate the LCA originate from LCI verified inventory data provided by ARPANEL.
The data for the processes come from the following databases: Ecoinvent v.3.5 (polyol, MDI, catalyst, n-pentane, gasket, packaging, water), specific EPDs (steel profile producers), Kobize/Tauron (energy carriers: electricity, diesel, natural gas and LPG). Specific data quality analysis was a part of the external ISO 14001 audit. Characterization factors are CML ver. 4.2 based on EN 15804:2013+A1 version (PN-EN 15804+A1:2014-04).
The allocation rules used for this EPD are based on general ITB PCR A. Production of the ARPANEL sandwich panels is a line process in the factory located in Strzelce Opolskie, Poland. Allocation for production A1 - A3 (PUR/PIR core vs Mineral Wool core production) is done on a production volume basis. All impacts from raw materials extraction and production (including: steel profiles production, polyols, MDI, catalysts, n-pentane, gasket, packaging and energy carriers and water) are allocated in the A1 module. 100% of the impacts from line production were inventoried and 69% were allocated to the PUR/PIR sandwich panels production. Utilization of packaging (PE, PP, timber) material was taken into consideration. Module A2 includes transport of raw materials such as steel products, chemicals, additives and ancillary materials from their suppliers to the Strzelce Opolskie manufacturing plant. Municipal factory waste were allocated to module A3. The Energy supply was inventoried for whole factory and 69% was allocated to the PUR/PIR based sandwich panels production (31% to Mineral Wool core panels). Emissions in the factory were estimated by using national conversion factors (KOBIZE, 2019) and were allocated to module A3.
The life cycle analysis of the declared products covers “Product Stage”, A1 - A3, C1 - C4 and D modules (Cradle to Gate with options) accordance with EN 15804+A1 and ITB PCR A. The input materials and energy consumption inventoried in factories were included in the calculation. In the assessment, all significant parameters from gathered production data are considered, i.e. all material used per formulation, utilized thermal energy, internal fuel and electric power consumption. It is assumed that the total sum of omitted processes does not exceed 5% of all impact categories. In accordance with EN 15804+A1, machines and facilities (capital goods) required for and during production are excluded, as is transportation of employees.
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