1st Few Fires: When your stove or pipe is new, there will be an odd smell during the first few fires. This is normal and you should refer to the stove or pipe installation instructions for information on how to cure the paint. You will like be instructed to gradually increase the heat and open some window for ventilation.

Persistent Smell: If your stove's paint is fully cured and you are still sometimes smelling an odd metallic smell then you could be getting your stove pipe a little bit too hot. This is especially true with double-wall stove pipe that has a stainless steel inner liner. Many stoves will have a bypass feature allowing you to quickly send heat up into the pipe when starting a fire. If this is left open for more than the recommended time then it can cause the pipe to give off a hot metallic smell.

As stainless steel heats, it can undergo slight oxidation. These oxides are generally in the form of a vapor and can contribute to a metallic smell. The smell does not pose any significant risk but You should ventilate the area and modify your burn habits to keep the temperatures in the pipe from getting so hot.