In the winemaking process, the fermentation is to ferment the mixture of koji and grain to produce alcohol; the distillation requires the use of a distiller, a condenser, etc. to extract the alcohol in the grain. These processes require a large amount of steam, so steam boilers are inevitably used. Some wineries use coal-fired steam boilers with lower fuel costs as their first choice. With the increasing awareness of environmental protection, some places restrict the use of small coal stoves, and gas and biomass boilers are favored by wineries because of their low cost and low pollution.