Principle papers
The purpose of SAP principle papers is to define the treatment of technologies that have applied for recognition within the National Calculation Methodology for energy rating of dwellings (RdSAP/SAP). In some cases, the recommendation provided by the NCM Contractor (BRE) may require deliberation by the SAP Scientific Integrity Group (www.sapsig.bre.co.uk), whilst in other cases the principle paper is a final resolution regarding the treatment of the technology.
SAP Principle Paper for the treatment of Voltage Optimisers in the National Calculation Methodology for energy rating of dwellings (SAP)