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. 42
Topic Requirement(s) Commentary
Monitoring
National Fire Protection Association, Standard NFPA 45, 2011
8.8.7 Measuring Device for Hood Airflow. A measuring device for hood airflow shall
be provided on each chemical fume hood.
8.8.7.1 The measuring device for hood airflow shall be a permanently installed device.
8.8.7.2 The measuring device for hood airflow shall provide constant indication to the
hood user of adequate or inadequate hood airflow.
American National Standard for Laboratory Ventilation ANSI/AIHA Z9.5-2003
3.3.3 All hoods shall be equipped with a flow-indicator, flow alarm, or face velocity
alarm indicator to alert users to improper exhaust airflow. The flow-measuring device
shall be capable of indicating airflows at the design flow and ±20% of the design flow.
The device shall be calibrated at least annually and whenever damaged.
Scientific Equipment & Furniture Association
SEFA 1–2006 Recommended Practices for Laboratory Fume Hoods
4.1.10 Hood Monitor
All hoods shall have some type of monitor for indicating face velocity or exhaust flow
verification. The monitor can be a simple pressure gage connected to a Pitot tube in
the exhaust duct, one of many electronic monitors, or a vane anemometer.
Regardless of the monitor installed, it should provide clear indication to the hood user
whether exhaust flow or face velocity is within design parameters.
A ribbon taped to the bottom of the sash is not acceptable.
ASHRAE, 2011 Handbook - HVAC Applications, Laboratories, Pg. 16.18, Operation
and Maintenance:
Centralized monitoring of laboratory variables (e.g., pressure differentials, face
velocity of fume hoods, supply flows, and exhaust flows) is useful for predictive
maintenance of equipment and for ensuring safe conditions
California OSHA – Division of Occupational Health & Safety (DOSH) Subchapter 7.
General Industry Safety Orders, Group 16. Control of Hazardous Substances,
Article 107. Dusts, Fumes, Mists, Vapors and Gases
5154.1. Ventilation Requirements for Laboratory-Type Hood Operations:
By January 1, 2008, hoods shall be equipped with a quantitative airflow monitor that
continuously indicates whether air is flowing into the exhaust system during operation.
The quantitative airflow monitor shall measure either the exact rate of inward airflow or
the relative amount of inward airflow. Examples of acceptable devices that measure
the relative amount of inward airflow include: diaphragm pressure gauges, inclined
manometers, and vane gauges. The requirement for a quantitative airflow monitor
may also be met by an airflow alarm system if the system provides an audible or
visual alarm when the airflow decreases to less than 80% of the airflow required.
(Continued on Next Page)
Fume hood users must be immediately
notified if the fume hood is not operating
properly. This mainly occurs due to a face
velocity that is too low or too high, or if there
is insufficient minimum exhaust airflow when
the sash is closed. Maximum user protection
is achieved by providing both a visual and an
audible annunciation of improper fume hood
airflow conditions. In addition, fume hood
airflow alarms that also report at a designated
location (such as on the facility’s ventilation
control and monitoring system) provide added
assurance that unsafe conditions will be
reported and those responsible for
maintaining safe laboratory conditions will
take appropriate action.