SAP stands for the standard Assessment Procedure and it's fully designed to assist you calculate how much energy your house is going to use. It also helps you to calculate your overall level of co2 emission and it's a compliance tool that's normally used alongside part L1A. https://www.briaryenergy.co.uk/air-permeability-testing/

#SAP calculations are supported the #energy balance of a new #development, considering a variety of things that contribute to energy efficiency. https://bit.ly/2Xnhp8P