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
Laboratory Ventilation Codes and Standards
Siemens Industry, Inc. 40
Topic Requirement(s) Commentary
Fire
Protection/
Emergency
Control
Provisions
National Fire Protection Association, Standard NFPA 45, 2011
8.10.1 Automatic fire protection systems shall not be required in chemical fume hoods
or exhaust systems except in the following cases:
(1) Existing hoods having interiors with a flame spread index greater than 25 in which
flammable liquids are handled.
(2) If a hazard assessment shows that an automatic extinguishing system is required
for the chemical fume hood, then the applicable automatic fire suppression system
standard shall be followed.
8.10.2 Automatic fire protection systems, where provided, shall comply with the
following standards, as applicable:
(1) NFPA 11, Standard for Low, Medium, and High-Expansion Foam
(2) NFPA 12, Standard for Carbon Dioxide Extinguishing Systems
(3) NFPA 12A, Standard for Halon 1301 Fire Extinguishing Systems
(4) NFPA 13, Standard for the installation of Sprinkler Systems
(5) NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection
(6) NFPA 17, Standard for Dry Chemical Extinguishing Systems
(7) NFPA 17A, Standard for Wet Chemical Extinguishing Systems
(8) NFPA 69, Standard on Explosion Prevention Systems
(9) NFPA 750, Standard on Water Mist Fire Protection Systems
(10) NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems
8.10.3.1 Automatic fire dampers shall not be used in chemical fume hood exhaust
systems.
8.10.4 Fire detection and alarm systems shall not be interlocked to automatically shut
down chemical fume hood exhaust fans.
8.10.6 Chemical fume hoods equipped with control systems that vary the hood exhaust
airflow as the sash opening varies and/or in conjunction with whether the laboratory
room is in use (occupied/unoccupied) shall be equipped with a user accessible means
to attain maximum hood exhaust airflow regardless of sash position when necessary or
desirable to ensure containment and removal of a potential hazard within the hood.
(Continued on Next Page)
The requirement that a user be able to apply
maximum exhaust to a fume hood regardless of
sash position primarily pertains to fume hoods
with VAV control systems that decrease fume
hood exhaust to maintain a constant face
velocity as the sash opening decreases. It is
conceivable that even with a sash fully closed
(and the exhaust thus minimized) a fire or highly
active chemical reaction may warrant
maximizing the fume hood exhaust without
having to open the sash. This capability is
normally implemented by including an
appropriate emergency exhaust activation
pushbutton on the fume hood’s monitoring
device.