OENORM EN 12831-3
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Title
Energy performance of buildings - Method for calculation of the design heat load - Part 3: Domestic hot water systems heat load and characterisation of needs, Module M8-2, M8-3
Short description
This European Standard describes a method for calculating the capacity and storage volume required for the design of hot water systems. The applicability ranges from direct water heaters (no storage volume and relatively large effective heat output) to larger storage systems with relatively low heat output and large storage volumes).
Link
https://shop.austrian-standards.at/action/de/public/details/623071/OENORM_EN_12831-3_2018_01_15