Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner; German version EN 303-3:1998 + A2:2004
Edition 2004-10

Heating boilers - Part 4: Heating boilers with forced draught burners; special requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum operating pressure of 3 bar; terminology, special requirements, testing and marking; German version EN 303-4:1999
Edition 1999-03

Heating boilers - Test code for heating boilers for atomizing oil burners; German and English version prEN 304:2023
Edition 2023-04

Heating boilers - Test code for heating boilers for atomizing oil burners; German version EN 304:2017
Edition 2018-02

Heat exchangers - Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers; German version EN 305:1997
Edition 1997-07

Heat exchangers - Methods of measuring the parameters necessary for establishing the performance; German version EN 306:1997
Edition 1997-07

Heat exchangers - Guidelines to prepare installation, operating and maintenance instructions required to maintain the performance of each type of heat exchanger; German version EN 307:1998
Edition 1998-12

Particleboards - Definition and classification; German version EN 309:2005
Edition 2005-04

Wood-based panels - Determination of moisture resistance under cyclic test conditions; German and English version prEN 321:2024
Edition 2024-05

Durability of wood and wood-based products - Testing and classification of the durability to biological agents of wood and wood-based materials; German version EN 350:2016
Edition 2016-12