AENOR UNE-EN 297:1995 Central heating boilers that use gaseous fuels. Type B boilers equipped with atmospheric burners, whose nominal heat consumption is equal to or less than 70 kW.
1995AENOR UNE-EN 297:1995 Central heating boilers that use gaseous fuels. Type B boilers equipped with atmospheric burners, whose nominal heat consumption is equal to or less than 70 kW.