Features and Functions:
Ventilation cabinets effectively isolate hazardous, flammable, and explosive materials in laboratories for operator use. They can promptly extract and expel harmful gases, vapors, or dust generated during experiments, preventing contamination of the laboratory environment and protecting the health of the personnel. Additionally, ventilation cabinets can provide a clean and dry working environment for certain precision instruments.

Categories & Selection
Ventilated cabinets can be categorized by their structure, including desk-type, upright, and recessed models. Larger, powerful sizes offer enhanced filtering and exhaust capabilities. When selecting, it's crucial to consider the lab space, operational needs, and the nature of experiments to determine the appropriate model and size. It's important to note that ventilation requirements vary by field and lab, so the correct product should be chosen.

Operation:
When using ventilation cabinets, experimenters should operate in accordance with specifications, maintain the cleanliness of the cabinet interior, and avoid obstructions affecting air flow. For downward ventilation cabinets, keep the work surface opening at a height to achieve suction effect. After experiments, clean the cabinet and shut off the ventilation system to prevent unnecessary energy waste. Regular maintenance and care for the ventilation system are also crucial.

Other considerations:
The placement and orientation of ventilation cabinets should be planned rationally to avoid interference from building structures, doors, and windows. Personal protection should also be observed when in use, such as wearing gloves and masks. Additionally, the lab should be equipped with necessary emergency equipment to handle potential accidents.