Canopy hoods are primarily used in environments with what type of emissions?

Canopy hoods are specifically designed to capture heavy vapors and gases that may be released during industrial processes or laboratory work. These hoods provide localized ventilation, effectively directing the heavier-than-air contaminants away from the breathing zone of workers and toward a proper exhaust system. Their design often includes a sloped structure that helps in capturing these heavier emissions, as they tend to settle close to the floor level rather than rising.

In scenarios where there are significant occurrences of vapors or gases, such as from chemical processes, the use of canopy hoods is essential in ensuring a safe working environment. Workers are protected from potential inhalation of harmful substances, making it critical for safety compliance and industrial hygiene practices. This focus on heavy emissions is what distinguishes canopy hoods from other types of ventilation systems that may not be as effective for managing these specific risks.