RHAN 2Diwygio’r Rheoliadau Adeiladu
Mewnosod rheoliad 26C yn y Rheoliadau AdeiladuI19
Ar ôl rheoliad 26B (gwerthoedd perfformiad ffabrig ar gyfer anheddau newydd) mewnosoder—
Minimum energy efficiency rating26C
Where a dwelling is erected, it must equal or exceed the energy efficiency rating for the dwelling which has been approved pursuant to regulation 25D applying the methodology of calculation and expression of the energy performance of buildings approved pursuant to regulation 24 for new buildings.