How do SAP calculations work?
SSSAP Calculations for New Dwellings SAP calculations measure two critical elements for dwellings in England: the Dwelling Emission Rate (DER) and the Dwelling Fabric Energy Efficiency (DFEE). These measurements compare to a Target Emissions Rate (TER) and a Target Fabric Energy Efficiency (TFEE) rate. Both the DER and DFEE must be lower than the target […]