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Energy performance of buildings Ventilation for buildings Part 5-2: Calculation methods for energy requirements of ventilation systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5, M7-8) Method 2: Distribution and generation. Original standard UNE-EN 16798-5-2-2018 in PDF full version. Additional info + preview on request

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Amendment 1 - Railway applications - Rolling stock - Head stock layout. Original standard UNE-EN 16839-2024 + A1-2026 in PDF full version. Additional info + preview on request

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Plastic piping systems buried outside the building structure Environmental product declarations Product Category rules complementary to EN 15804. Original standard UNE-EN 16903-2026 in PDF full version. Additional info + preview on request

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Plastics piping systems inside the building structure Environmental product declarations Product category rules complementary to EN 15804. Original standard UNE-EN 16904-2026 in PDF full version. Additional info + preview on request

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Electronic invoicing Part 1: Semantic data model of the core elements of an electronic invoice. Original standard UNE-EN 16931-1-2026 in PDF full version. Additional info + preview on request

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Liquid petroleum products. Determination of the sulfur content in Ethanol (E85) automotive fuel. Wavelength dispersive X-ray fluorescence spectrometric method. Original standard UNE-EN 16997-2026 in PDF full version. Additional info + preview on request

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