Basic Documentation
Table Of Contents
- Introduction
- Applicable Definitions (Alphabetical Listing)
- Laboratory Safety
- Hazard Assessment
- Chemical Hygiene Plan
- Chemical Hygiene Responsibilities
- Fume Hoods
- When Required & Safe Usage
- Gloveboxes:
- Face Velocity
- Face Velocity Setback
- Size & ADA Compliance
- CAV (Constant Air Volume) Bypass
- CAV (Constant Air Volume) Conventional
- VAV (Variable Air Volume)
- VAV Diversity
- Automatic Sash Closure
- Safe Operation of Sashes
- Accessories, Services and Explosion Protection
- Ductless
- Auxiliary Air
- (Special Purpose) Perchloric Acid
- Room Air Cross Currents
- Minimum Exhaust
- Monitoring
- Selection Criteria and Performance Specifications
- Laboratory Design & Fume Hood Implementation
- Maintenance
- Periodic Testing
- Test Procedures
- Signage and Recordkeeping
- Shutdown Procedures
- Evaluating CAV (Constant Air Volume) Systems
- Evaluating VAV (Variable Air Volume) Systems
- Biological Laboratories
- Biosafety Level 1
- Biosafety Level 2
- Biosafety Level 3
- Biosafety Level 4
- Ventilation for Biosafety Level 1
- Ventilation for Biosafety Level 2
- Ventilation for Biosafety Level 3
- Ventilation for Biosafety Level 4, Cabinet Laboratory
- Ventilation for Biosafety Level 4, Suit Laboratory
- Containment Levels - Canada
- Containment Levels and Ventilation Requirements: Canada
- Biological Safety Cabinets and Classifications
- Biosafety Cabinet Applications
- Biosafety Cabinets – Installation and Safe Usage Recommendations
- Biosafety Cabinets – Certification and Safe Usage - Canada
- Biological Safety Cabinet Design, Construction and Performance Requirements
- Biosafety Cabinet Testing
- Ventilation Systems
- Local Ventilation -When Required
- Ventilation Rates for Animal Rooms
- Ventilation Rates for Animal Rooms
- Ventilation Rates for Biological Labs
- Ventilation Rates for Chemical Laboratories
- Ventilation rates for Storage areas
- Room Supply Air
- Supply Air Quality and Filtration
- Room and Duct Pressurization
- Human Occupancy, Room Temperature and Humidity
- Animal Rooms Room Temperature and Humidity
- Load Calculations
- Room Sound Level and Vibration
- Emergency Control Provisions
- Energy Conservation
- Monitoring
- Maintenance
- Periodic Inspection and Testing
- Periodic Inspection and Testing - Canada
- Test Records
- Management
- Exhaust Systems
- Configuration
- Leakage
- Components
- Manifolded Systems
- Air Velocity
- Stack Height and Discharge Location
- Operational Reliability
- Recirculated Air and Cross Contamination
- Materials and Fire Protection
- Commissioning
- Commissioning - Canada
- Referenced Publications
Fume Hoods
Siemens Industry, Inc. 29
Topic Requirement(s) Commentary
Safe
Operation of
Sashes
U.S. OSHA, 29 CFR, Part 1910, Occupational Safety and Health Standards,
Subpart Z, Toxic and Hazardous Substances,1910.1450, Appendix A
Confirm adequate hood performance before use; keep hood closed at all times except
when adjustments within the hood are being made;
American National Standard for Laboratory Ventilation, ANSI/AIHA Z9.5-2003
7 Work Practices
The sash or panels shall be closed to the maximum position possible while still
allowing comfortable working conditions.
Hood users shall be trained to close the sash or panels when the hood is not in use.
National Fire Protection Association, Standard NFPA 45, 2011
8.8.3.1 Chemical fume hood sashes shall be kept closed
whenever possible.
8.8.3.2 When a fume hood is unattended, its sash shall remain
fully closed.
Scientific Equipment & Furniture Association
SEFA 1–2006 Recommended Practices for Laboratory Fume Hoods
6.5.3 Proper Configuration of Vertical and Horizontal Sliding Sashes
The vertically sliding sash should always be located lowered as much as possible to
protect the user and to minimize visual obstruction from sash handle. Raise the sash to
full open position for set- up purposes only.
Reducing the sash to below the user’s breathing zone provides a protective barrier
between the researcher and the experiment.
Always close the sash when not working in the hood.
American Conference of Governmental Industrial Hygienists (ACGIH)
INDUSTRIAL VENTILATION A Manual of Recommended Practice, 27th Edition
VS-35-04
Keep the hood sash closed as much as possible.
The standards are clear and unanimous with
regard to closing sashes. For safety, lab
workers must close sashes whenever
possible.
Laboratories are advised to address sash
closure in the Chemical Hygiene Plan in terms
of:
• Establishing the practice
• Training the workers
• Monitoring the results
Engineering options (like face velocity
setback) that accommodate work practices of
leaving sashes open directly contradict safety
standards and regulations.
Safe user practice and discipline requires call
for closing the sashes whenever possible.
Automatic sash closures tend to negate this
aspect of safety consciousness and the time
delay before automatic sash closures operate
may be reduce the overall time that the
sashes are actually closed.