Gas mixer

A gas mixer, which is adapted to communicate with at least one burner, comprising:

• a base having an inlet portion and a mixing portion, wherein the inlet portion has an air inlet, at least one gas inlet, and an air path;
• the air path communicates with the air inlet and the at least one gas inlet, and has an exit;
• the mixing portion has a mixing chamber communicating with the exit;
• and
• at least one outlet pipe engaged with the mixing portion of the base, wherein the outlet pipe has a first end, a second end, and a body located between the first end and the second end;
• part of the body and the first end extend into the mixing chamber, and the exit of the air path corresponds to the body;
• the second end is adapted to communicate with the burner.