Publication of a methodology for determining ECO4 project cost savings
54.—(1) The Administrator must publish, on its website, a methodology for the purpose of determining the annual cost savings of an ECO4 project that meets the requirements of article 49.
(2) Under the methodology published by the Administrator the determination of the annual cost savings must—
(a)be based on the difference between the pre-project SAP rating and the post-project SAP rating; and
(b)where the ECO4 project includes an item of work—
(i)to which article 62(2) applies; and
(ii)which is the extraction of cavity wall insulation or loft insulation,
take into account any impact that work would have on the SAP rating of the domestic premises as compared to the pre-project SAP rating.
(3) The methodology must provide that, if the post-project SAP rating is more than 90, it is to be treated as if it were 90.
(4) Before publishing a methodology under this article, the Administrator must have regard to the Standard Assessment Procedure and the Reduced Data Standard Assessment Procedure.
(5) In this article, “post-project SAP rating” has the same meaning as in article 53(2)(a).