From 2010 to March 2021, more than 67,100 lower income households have benefitted, saving an average of more than £300 on their annual bills.
Ers ei lansio yn 2009/10, mae dros 67,100 o aelwydydd incwm is wedi elwa ar welliannau effeithlonrwydd ynni, gan arbed tua £300 ar gyfartaledd ar eu biliau ynni a lleihau allyriadau carbon.