Basic Documentation

Table Of Contents
Fume Hoods
Siemens Industry, Inc. 43
Topic Requirement(s) Commentary
Monitoring
(Continued)
(B) Qualitative airflow measurements that indicate the ability of the hood to maintain
an inward airflow at all openings of the hood as required shall be demonstrated using
smoke tubes or other suitable qualitative methods. This demonstration shall be
performed:
1. Upon initial installation
2. On an annual basis
Exception to (B) 2: The frequency of the tests may be reduced to every two years if
a calibration and maintenance program is in place for the quantitative airflow monitor
or alarm system.
3. After repairs or renovations of the hood or the ventilation system in that part of the
facility where the hood is located; or
4. After the addition of large equipment into the hood
U.S. OSHA, 29 CFR, Part 1910, Occupational Safety and Health Standards,
Subpart Z, Title: Toxic and Hazardous Substances,1910.1450,C4(b):
…each hood should have a continuous monitoring device to allow convenient
confirmation of adequate hood performance before use. If this is not possible, work
with substances of unknown toxicity should be avoided or other types of local
ventilation devices should be provided.