Solved by verified expert:Please fine the attachment my buddy from my group did the first page and I am required to the second page related to it. Please include an appropriate citations. Before you start please let me know if something un clear.
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Laboratory activities contains highly chemical and biological hazardous. Which may lead to
chronic or acute effects to the people exposed. There are different types of laboratory grade
ventilation systems in practice based on the chemical or biological agent. These systems not only
protect the people but also the samples from moisture or any air born bacteria. This is paper
explains the different classes of laboratory fume hoods and their functions based on NFPA
standards. Moreover, mostly focusing on our own laboratory fume hood.
The place where chemical or biological analysis conducts is called laboratory. There are many
types chemical and biological sample which needs to analyse in closed environment and at same
time protection of the user and sample need to ensure. But, compare to chemicals, biological agents
A laboratory flow hood mostly assembled in chemistry lab to avoid toxic chemical release and in
many laboratory, it is also used to store the chemical that can be harmful to the environment.
Coming to biological lab also need to be an enclosed and with laminar air flow to avoid cross
contamination and to create as sterile environment.
Mainly common laboratory flow hoods are classified bases mainly on the air flow directions.
Class1.Air flows towards the experiment samples conducted.
Class2.Air flows towards the chamber then fresh air from top of the chamber. HEPA filters will
filter the exhaust air before release to the environment and also air can recirculate inside the
Class 3. Air passing into the cabinet need to purify before entering and later exiting with HEPA
filter. These class mostly used for sensitive biological analysis to ensure that it is contamination.
The other fume hoods type is bypass hoods, work with constant volume of air. bypass
fume hoods are in numerous kinds like auxiliary air, high performance, and reduced air
volume hoods. Even we can observe special type of fume hoods for radioactive and
corrosive to prevent the release of these elements to the environment.
NFPA 45 5.4.1(4) – Clarify or define “adjacent” if necessary. NFPA 45 5.4.1 – clarify square foot requirement is based on gross or net
square feet, if needed. Should there be a requirement for educational and instructional labs to have hoods/demonstration area located in
back of a classroom if the room has only 1 exit?
NFPA 45 does not address a second means of egress for laboratory work areas based on occupant load. NFPA 45, Section 5.3 defers to
NFPA 101, except where modified in NFPA 45. NFPA 45, 5.4.1, would require a second means of egress if any of the situations listed were
present in an educational laboratory work area. Does NFPA 45 need to require a second means of egress for educational or instructional
labs that are less than 1,000 square feet, but have an occupant load greater than 50 or do we refer to NFPA 101 requirements?
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