Carry out appropriate benchmarking between bidders and to the current market costs of energy efficiency measures to ensure consistency in pricing and obtain value for money.
Dylid cynnal gwaith meincnodi priodol rhwng cynigwyr a chostau cyfredol mesurau effeithlonrwydd ynni yn y farchnad er mwyn sicrhau cysondeb o ran prisio a chael gwerth am arian.