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. 28
Topic Requirement(s) Commentary
Automatic
Sash Closure
American National Standard for Laboratory Ventilation ANSI/AIHA Z9.5-2003
3.1.1.4 The following conditions shall be met before using automatic sash closing
devices: users must be made aware of any limitations imposed on their ability to use
the hood;
• Automatic sash positioning systems shall have obstruction sensing capable of
stopping travel during sash closing operations without breaking glassware, etc.
• Automatic sash positioning shall allow manual override of positioning with forces
of no more than 10 lbs (45 N) mechanical both when powered and during fault
modes during power failures.
Implementing sash closure devices should be
done with consideration of the following:
• Energy savings will not occur if automatic
sash closures are applied to non-VAV
fume hoods. Except for VAV fume hoods,
hood air consumption is not reduced
when sashes are closed on CAV fume
hoods since CAV hoods cannot vary
overall airflow based on sash position.
• 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.
• Alternate means to encourage and attain
sash closure by the users include having
‘warning beeps or chirps’ when
unattended hoods sashes remain open.