NA 041
DIN Standards Committee Heating and Ventilation Technology and their Safety
Standards
[Pre-order]
DIN EN 257
DIN EN 257
Mechanical thermostats for gas-burning appliances; German version EN 257:2022+A1:2023
Title (German)
Mechanische Temperaturregler für Gasgeräte; Deutsche Fassung EN 257:2022+A1:2023