2023EN 12309-1:2023 Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions
2014EN 12309-1:2014 Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions
1999EN 12309-1:1999 Gas-Fired Absorption and Adsorption Air-Conditioning and/or Heat Pump Appliances with a Net Heat Input not Exceeding 70 kW - Part 1: Safety