enclosed box with a transparent window airtight sash that slides up and down exhaust fan at the back controls for setting the fan speed or airflow vents for fresh air intake internal light power outlets and switches safety interlock switch
fumehood which has enclosed box with a transparent window fumehood which is airtight sash that slides up and down fumehood which has exhaust fan at the back fumehood which has controls for setting the fan speed or airflow fumehood which has vents for fresh air intake fumehood which has internal light fumehood which has power outlets and switches fumehood which has safety interlock switch