Which factor does not influence the capture efficiency of exhaust outlets?

The factor that does not influence the capture efficiency of exhaust outlets is the color of the hood. Capture efficiency typically depends on various physical factors such as the size of the outlet, which affects airflow and volume of air being extracted. The distance from the source of particulate matter is critical as it determines how effectively the exhaust system can pull contaminants from the surrounding environment. The orientation of the hood also plays a significant role; it affects how well the hood can capture emissions based on airflow patterns.

Conversely, the color of the hood does not affect its functional ability to capture particles or control emissions. While the color might influence aesthetic aspects or the temperature of the hood surface due to heat absorption, it does not impact the mechanics of airflow, suction, or the ability to filter particulates from the air, thereby making it irrelevant in the context of capture efficiency.