Unpacking the “new” EPC: What RdSAP 10 means for your home
Energy Performance Certificates (EPC) for existing homes are calculated using a government-approved methodology called the Reduced Data Standard Assessment Procedure (RdSAP). On June 15th 2025, RdSAP 10 was introduced, replacing the RdSAP 9, which has been in use since 2007. Quite a lot has changed, requiring measurements such as window dimensions and allowing additional data […]
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