Green Deal Benefits Overstated, Study Claims

The system used to calculate energy savings under the Green Deal, which is critical to the flagship energy efficiency programme’s success, is unreliable and inflates the savings a householder can expect to achieve from retrofit work to their home by as much as 77%, a study has found.  Social housing provider Affinity Sutton, which produced the study, monitored the effect of retrofit work carried out by contractor Keepmoat on 102 homes over the course of a year.  The data, analysed by consultants Verco, Baily Garner and Parity Projects, found that the SAP model, which is used to calculate building performance, on average predicted that tenants would save 77% more on their energy bills than they actually did.  Read more on the Building website.