What is the process of removing combustion gases through a vent called?

The process of removing combustion gases through a vent is most accurately described as venting. This term specifically refers to the system and procedure designed to safely channel combustion byproducts, such as smoke and exhaust gases, away from appliances and living spaces to the outside atmosphere. Proper venting is crucial to ensure that harmful gases do not accumulate indoors, preventing risks such as poisoning or fire hazards.

While "exhaust" might seem relevant as it also pertains to the discharge of gases, it typically describes the gases themselves rather than the process of their removal. "Extraction," on the other hand, implies the act of taking something out, but it lacks the specificity of addressing combustion gases and their safe removal via a venting system. "Filtration" involves the removal of particulate matter or impurities from a substance, but it does not directly relate to the removal of gases from combustion processes. Therefore, venting is the term that best captures the process described in the question.