Follow the Optimised Retrofit approach, improving energy efficiency of homes when most appropriate – identifying measures and installing them with no disruption to householders,
Dilyn y dull Ôl-osod er mwyn Optimeiddio, gan wella effeithlonrwydd ynni cartrefi pan fo'n fwyaf priodol – nodi mesurau a'u gosod heb amharu ar ddeiliaid tai,