Which coal-burning hot blast stove or water heating stove saves coal?

Coal-burning hot blast stove.

A water heater needs to heat the water first and use hot water to increase the indoor temperature, so it takes longer. The hot air stove directly heats the air to increase the indoor temperature by burning coal, so it is faster. Therefore, compared with water heating stoves, hot air stoves will save more coal because they are more direct and faster.

Coal-fired hot blast furnaces began to be widely used in China in the late 1970s. They have become a replacement for electric heat sources and traditional steam power heat sources in many industries.