Table of Contents
What is the purpose of a fume hood?
The purpose of a chemical fume hood is to prevent the release of hazardous substances into the general laboratory space by controlling and then exhausting hazardous and/or odorous chemicals.
What is a fume hood and how does it work?
A fume hood is a piece of laboratory equipment designed to minimize a person’s exposure to hazardous chemicals. The fume hood draws away harmful vapors so lab employees can work with chemicals without the risk of accidental exposure.
What is meant by fume hood?
A fume hood is a ventilated enclosure in which gases, vapors and fumes are contained. An exhaust fan situated on the top of the laboratory building pulls air and airborne contaminants through connected ductwork and exhausts them to the atmosphere.
When should fume hoods be used?
Fume hoods should be used when working with toxic compounds or compounds with a boiling point below 120°C. Fume hoods, or other effective local ventilation, must be provided and used when the materials used will exceed exposure limits in the laboratory.
How many types of fume hoods are there?
A fume hood is typically a large piece of equipment enclosing five sides of a work area, the bottom of which is most commonly located at a standing work height. Two main types exist, ducted and recirculating (ductless).
Can you store chemicals in a fume hood?
The fume hood is often the primary control device for protecting laboratory workers when working with flammable and/or toxic chemicals. Do not permanently store any chemicals inside the hood.
How do I know if my fume hood is working?
Process:
- Turn on hood.
- Check the vaneometer.
- Match red arrow on sash with red arrow on the side panel of the hood.
- To acquire reading hold vaneometer in the center of the hood.
- Acceptable standard -Chemical fume hoods should operate at a face velocity of (80-120) Linear Feet Per Minute.
How much does a fume hood cost?
A few industry professionals estimated that anywhere from $1,200 to $2,500 per linear foot is the suggested “rule of thumb” to determine the final price of a fume hood. That means the cost of a 6 ft fume hood would likely be anywhere from $7,200 up to $15,000, according to industry standards.
How do you know if the fume hood is working?
Process:
- Turn on hood.
- Check the vaneometer.
- Match red arrow on sash with red arrow on the side panel of the hood.
- To acquire reading hold vaneometer in the center of the hood.
- Acceptable standard -Chemical fume hoods should operate at a face velocity of (80-120) Linear Feet Per Minute.
What are fume hoods made of?
A fume hood, technically a laboratory chemical hood, is a type of local exhaust ventilation system (engineering control). A typical fume hood is cabinet with a moveable front sash (window) made out of safety glass.
What types of chemicals should always be handled inside fume hoods?
Applications. Fume hoods: Chemical fume hoods can be used to handle the following: odorous materials, toxic gases, reactive materials, chemicals that can spatter, aerosols, carcinogens, flammables or other toxic and volatile materials.
How should a fume hood be left when not in use?
If not in use, the fume hood must remain “ON” if chemicals are inside to continually eliminate contaminated air in the laboratory. Newer buildings are designed so that fume hoods continually runs as part of the building exhaust system. 6.