Firstly: you must take into account the factors of the whole system, such as: the space of the laboratory, the ventilation control system of the building, the arrangement of the exhaust piping, and the arrangement of the fume hood and so on, and secondly: you need to determine which type of fume hood you need, and when choosing, usually you can follow the The following factors to measure:
1. Upper cabinet part:
There are three styles: standard type, low table type, floor type.
Whether the surface wind speed of the fume cupboard meets the requirements of international standards for safe wind speed: 0.5m/s (international standards stipulate that only when the surface wind speed reaches 0.5m/s can the harmful gases inside the cupboard be effectively captured).
Whether the opening height of the fume hood is suitable to meet your needs for operating space.
Ventilation control system: fixed air volume, variable air volume or adaptive control system.
Lining material: PP, fiberglass or polyethylene resin.
Whether the raw material of the adjustable door is made of safety glued glass, and whether its design is in line with the human body mechanics, so that the operator can pull freely.
2. Countertops:
Whether the countertop is made of safe disc design, which makes it easy for users to clean the countertop and prevents the leakage of toxic liquids.
Whether the material of the countertop meets your experimental needs to resist the corresponding erosion and high temperature.
Whether a cup or sink is installed and whether it is in a reasonable position.
Whether the design of the air outlet is reasonable.
3. Bottom cabinet:
Whether the material is durable, fireproof, and can resist the erosion of the acid and alkali environment in the laboratory.
Whether the power supply is reasonable and safe.
Is it easy to maintain the water, electricity, gas system.
Whether the bottom cabinet needs to be designed for pumping so that you can place volatile drugs.
When you have basically chosen the model, style and size of the fume cupboard, you can determine what you need according to the following conditions.
4. Accessories:
Water source: distilled, purified or reverse osmosis water and so on.
Gas source: Nitrogen, Oxygen or Air, etc.
The selection of the electrical system takes into account: type, voltage, protection against violence, durability and so on.
Whether or not a sealing plate is required for aesthetic reasons.