The Nest scheme calculated the effects of energy efficiency improvements on the homes using a Reduced Data Standard Assessment Procedure (SAP) rating*.
Cyfrifodd cynllun Nyth effeithiau ei welliannau effeithlonrwydd ynni ar gartrefi gan ddefnyddio sgôr Gweithdrefn Asesu Safonol Data Gostyngol (SAP)1.