Domestic Energy Assessment QCF Level 3 -Domestic Energy Assessor Training Funded by a student finance loan. DEA Training. Introduction to energy assessment The City & Guilds Award and assessment process Assessment of Professional Supplementary Skills and open book exercises Calculating heat loss perimeters & floor areas with a practical measuring exercise Assessing date of construction including a workshop exercise RdSAP data collection and conventions Understanding the energy efficiency recommendations generated by RdSAP RdSAP software access and functionality including online case study