MIRA, the first modulating oil boiler: Extremely economical with low-energy 'Perpetum' burner

摘要

The trend toward lower heat demand levels both in new building constructions and in the modernization of older dwellings is likely to intensify in the future. The market is inereasingly receptive to central healing boilers offering a low nominal capacity and high efficiency combined with minimum emission levels. Oil-fired central-heating boilers with pressure atomizing burners rated at the current lower capacity limit of approx. 14 kW largely fail to provide the kind of output variability that allows these units to be adapted to prevailing outdoor temperatures. In other words, they cannot be effectively regulated according to the actual heat demand. The market advantage of natural gas (heat generators with premix burners have been widely available for some time now and these, with their modulating method of operation, are able to attain particularly high efficiency levels) inspired Windhager Zentralheizung AG to develop a similarly sophisticated technology for oil, the results of which are presented in the following.