Investigation of Real Efficiency of Condensing Boiler in Conventional Heating Systems

Due to the importance of reducing energy consumption in today's world, the energy consumption should be separated from false claims. In this paper, higher than 98% efficiency claim in a "Condensation Package" is scientifically evaluated with few empirical indications in this field. The results show that, at least in countries where electricity is produced by natural gas, considering the actual operating conditions of the heating systems, not only the condensation package does not increase the efficiency, but the use of more electricity for the exhaust fan of combustion products in these packages also reduces efficiency. In fact, using electricity energy for exhausting the combustion product gases is the reason of efficiency decreasing. In addition, the problems arising from the distillation of water in the chimney flue perimeter wall of the building damage and environmental degradation as well and increase the air pollution. It is also noted that even for system operation under certain conditions, such as melting ice, thermal efficiency is never more than 98%.