Persistent fuel poverty – Households needing to pay more than 10% of their full household income to maintain a satisfactory heating regime in two out of the three preceding years [ 6 ] .
Tlodi tanwydd parhaus – Aelwydydd yr oedd angen iddynt dalu mwy na 10% o incwm llawn y cartref er mwyn cynnal system wresogi foddhaol am ddwy o'r tair blynedd flaenorol [6].