Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW; German version EN 15502-2-1:2022+A1:2023

Gas-fired heating boilers - Part 1: General requirements and tests; German version EN 15502-1:2021+A1:2023

Fans - Safety requirements; German version FprEN 17170:2019

Heating systems and water-based cooling systems in buildings - Design for water-based cooling systems; German and English version prEN 17671:2024

Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 4-2: Space heating generation systems, heat pump systems, Module M3-8-2, M8-8-2; German and English version prEN 15316-4-2:2022