Purposes of the invention is the firewood boiler for constructing structure and function, pavilion, with South Korea's dry type Saunas, wherein the structure applies daedongorae (return) types in traditional hypocaust type, and it is capable of providing heat and hot water is obtained using pipe by conversion heating hypocaust inflow hot water to a distant place, wherein returning to (daedongorae) type prevents heat from can reduce heat loss from lost by chimney and carry out weakening existing firewood boiler, and the hypocaust that pipe buries is not copper pipe, but XL pipes are cheap and are easily worked. For said effect, XL tubing be embedded in after pebbles be covered on it is 2 centimetres thick with a thickness of loess is spread with after 7 centimetres, in this way to the damage XL pipe hypocausts of pipe, and it can prevent fire resistant doorsets that there is refractory brick to adjust device, fire door and fire door, the fire door is located below, so that heat hypocaust can remain for a long time. In addition, what the hypocaust on the upside of pavilion structure substantially completely insulated, particularly, comprising: entrance and insulation Dual-window; It can be opened or be closed with three Dual-windows. Therefore, sealing pavilion structure may be used as Korean dry type sauna sweat, and wherein waste allows the body metabolism of user to be activated as from being discharged in body, may be used as pavilion with pavilion structure reception outdoor air is opened. ;The 2014 of copyright KIPO submissions
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