Canopy hoods are a type of fume hood used in laboratory research, manufacturing, testing and educational facilities to manage the supply, exhaust ventilation and recirculation of air in the facility. Air quality in intense laboratory environments is compromised by many factors including research that creates unhealthy or annoying off gases and fumes, equipment that generates heat, temperature and humidity control due to geographic environments, air particulate matter, to name a few. Canopy hoods, fume hoods, bio-safety cabinets and exhaust hoods assist in improving air quality, providing employee safety, research efficacy and validation, energy management, and workflow productivity.
Canopy hoods are typically made of steel or stainless steel designed to cover large spaces as shown in the picture above. Canopy or exhaust hoods, as they are often called, act like vents that draw low volumes of nuisance or harmful fumes created by equipment or research testing. Because canopy hoods are typically ceiling mounted and do not provide an enclosed space around the fume generation area, they do not contain all gases and fumes. As a result they are typically only advised for use with fumes and gases that are not harmful to humans or specimens.
Another type of canopy hood is used for small fume extraction, typically table top point of use research work. It is often called a snorkel hood because a long flexible snorkel tube is connected to the building exhaust air system. The picture below shows the use of a snorkel hood in a university teaching laboratory. Students are able to move the snorkel device into position above or beside their research, specimens or equipment as required. Like canopy hoods, due to their design and low volume of exhaust, snorkel hoods do not capture all fumes generated in the test area. They should be used only in non-harmful fume situations.
Haldeman Homme has decades of experience and thousands of canopy exhaust hood applications in use today in health care, education, research, manufacturing and industrial facilities. We design, source, install and service all canopy hoods, fume hoods, ductless hoods, and snorkel hoods. Contact one of our canopy hood experts for assistance with the design or installation of your next project.
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