Melting the solder often results in the production of fumes, these fumes can be toxic with extended exposure and so, soldering if often done in areas with good ventilation or in the presence of an exhaust system/fan. | Melting the solder often results in the production of fumes, these fumes can be toxic with extended exposure and so, soldering if often done in areas with good ventilation or in the presence of an exhaust system/fan. |