| 摘要 |
The present invention relates to a boiler which re-uses energy sources without emitting environmental pollutants. Hot wind exhausted from a combustion chamber circulates and returns to the combustion chamber by passing the inside of a heat supplying unit through a hot wind supplying pipe, and accordingly heat efficiency is maximized by keeping the temperature of heating water. Also the hot heat from a hot heat chamber is delivered to an indoor space through a passage. |
