9. Ar ôl rheoliad 26B (gwerthoedd perfformiad ffabrig ar gyfer anheddau newydd) mewnosoder—
26C. 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.”
Gwybodaeth Cychwyn
I1Rhl. 9 mewn grym ar 23.11.2022, gweler rhl. 1(3)