SUPAFIL E-Calculator is the application designed for estimating the benefits after using of SUPAFIL in Cavity Walls. The idea is to determine the potential benefits in the areas of energy savings, financial gains and reduction of CO2 emissions. The software results are calculated based on improvement of wall insulation after blowing of SUPAFIL into cavity in the wall. Energy savings are calculated based on HDD method. Financial savings calculation is based on energy savings and fuel costs. Calculation of CO2 emissions reduction is based on emissivity of fuels.