The information collected must be entered into the DEAP calculation software. All the information associated with the dwelling must be carefully stored so that it is available should the property be selected for audit by the SEAI. The calculation and administration will take several hours depending on the complexity of the dwelling. An approximate estimate for a standard 3 to 4 bed semi detached dwelling is between 3 and 5 hours. More complex dwellings may take longer. The certificate will be provided within a reasonable timescale of the survey in accordance with the assessor’s schedule and workload but generally most assessors endeavour to provide the certificate within one week of the survey date.