The fireplace is a heating facility that works with ordinary cooking stoves and complex boilers without special distinction, which is the heat of the fuel that releases the energy to heat the object or space. Total heat is transmitted mainly through conduction, convection, and radiation three forms, conduction is through high temperature logistics and cryogenic objects direct contact, so that the heat from the high temperature object to low temperature objects, for fireplaces This is not the most important way of heat transfer, but is to control the heat transfer mode, because the heat through the contact with the fireplace frame body and external structure will make the fireplace heat loss, the fireplace of cast iron outside the frame will also produce a high temperature. Therefore, in the general situation, the inner wall of the fireplace is to do internal insulation treatment to prevent heat transfer and loss. Convection is the air is heated to produce a flow cycle to promote indoor temperature increase, for the open fireplace, this is a common heat conduction way, of course, for the gas fireplace, open fireplace to the release of combustion CO2 are ranked indoors, some unsafe. If it is a wooden fireplace, in the efficiency of the chimney is not very high, because of the air convection, part of the air will be mixed with soot spread to indoor and affect the air quality, so indoor ventilation and ventilating is important. Some of the possible side effects can be achieved by improving the size of the oven cavity and improving the efficiency of the chimney. Radiation is the most important way of heating the fireplace, and the radiant heat and the sun glow are the same. In the usual case, radiation heat transfer is the best choice, especially for closed fireplace heat transfer.