RHAN 2Diwygio Rheoliadau Adeiladu 2010
Adeiladau newydd: y gofynion sylfaenol ar gyfer perfformiad ynni5
Ar ôl rheoliad 25B mewnosoder—
New buildings: minimum energy performance requirements25C
Minimum energy performance requirements may be approved by the Welsh Ministers, in accordance with the methodology approved pursuant to regulation 24, for—
a
new buildings (other than new dwellings), in the form of target primary energy consumption rates; and
b
new dwellings, in the form of target fabric performance values.