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DIN 18234-1
Fire safety of large roofs for buildings - Fire exposure from below - Part 1: Roof areas without openings - Requirements and testing
DIN EN IEC 60623
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented nickel-cadmium prismatic rechargeable single cells
NA 005-05-21 AA -dormant
Geothermy - Closed-loop heat exchange systems in boreholes (Downhole heat exchangers)
NA 060-16-30-11 AK -dormant
Closed transfer Systems
ISO/TC 23/SC 2/WG 11
Enclosed agricultural cabs and environmental air quality
DIN 18910
Thermal insulation for closed livestock buildings - Thermal insulation and ventilation - Principles for planning and design for closed ventilated livestock buildings
DIN EN 613/A1
Independent closed-fronted gas-fired type B11, type C11, type C31 and type C91 heaters; German and English version EN 613:2021/prA1:2025
DIN EN 12897-1
Water supply - Indirectly heated unvented (closed) storage water heaters - Part 1: General specifications and common test methods
DIN VDE V 0700-200
Household and similar electrical appliances - Safety - Part 200: Particular requirements for pressured storage water heaters for boiling water; Text in German and English
EN 613/prA1
Independent closed-fronted gas-fired type B11, type C11, type C31 and type C91 heaters