Labconco Class I Enclosure Models 3980423 - Manual (Page 75)

Appendix C: Filtered Enclosure Specifications
Product Service 1-800-522-7658 71
Industrial Ventilation-ACGIH

Fume hood face velocities between 60-100 lfpm

Maximum of 125 lfpm for radioisotope hoods

Duct velocities of 1000-2000 fpm for vapors, gasses and smoke

Stack discharge height 1.3-2.0 x building height

Well designed fume hood containment loss, <0.10 ppm
Industrial Ventilation, A Manual of Recommended Practice.
24
th Edition, 2001
American Conference of Governmental Industrial Hygienists
1330 Kemper Meadow drive
Cincinnati, OH 45240-1634
(513) 742-2020
www.acgih.org
ASHRAE 110-1995 Method of Testing Performance of Fume Hoods
Evaluates fume hood’s containment characteristics

Three part test: Smoke generation, Face velocity profile, Tracer gas release @ 4 liters
per minute

Rated As Manufactured (AM), As Installed (AI) and As Used (AU)
American Society of Heating, Refrigerating, and Air Conditioning Engineers
1791 Tullie Circle N.E.
Atlanta, GA 30329
(404) 636-8400
www.ashrae.org
ANSI Z9.5-1993 Laboratory Standard
Covers entire laboratory ventilation system.

Vertical stack discharge @ 2000-3000 fpm

New and remodeled hoods shall have a monitoring device

Ductless hoods should only be used with non-hazardous materials

Fume hood face velocities between 80 – 120 fpm
American Industrial Hygiene Association
2700 Prosperity Avenue, Suite 250
Fairfax, VA 22031
(703) 849-8888
www.aiha.org
SEFA 1-2002

Fume hood face velocities based on toxicity levels of chemicals
Class A – 125 to 150 fpm
Class B – 80 to100 fpm
Class C – 75-to 80 fpm

Test method – face velocity profile and smoke generation
Scientific Equipment & Furniture Association
1028 Duchess Drive
McLean, VA 22102
(703) 538-6007
www.sefalabs.com