A fume chamber is a specially constructed enclosed space where potentially hazardous chemical reactions that produce harmful gases may be safely conducted and are designed to quickly and safely disperse any such gases. Fume chambers usually have a viewing window built into a (well sealed) access door in order that the chemical reaction taking place may be observed.
Fume chambers are designed to protect operators from eventually appearing to noxious matters. They are said to be the most important units in laboratories. They have a double skin sandwich construction, and can be made of metallic, wooden or plastic materials.
They use co2 chambers to euthanize rodents for snake food.