ANSI Z9.5-2003 PDF

ANSI/AIHA Z– American National Standard — Laboratory Ventilation. Secretariat. American Industrial Hygiene Association. Approved September Download ANSI-AIHA Z Short Description. Download ANSI-AIHA Z9 Description. American National Standard for. Download Citation on ResearchGate | On Oct 1, , D Jeff Burton and others published New lab ventilation standard. ANSI/AIHA Z affects every lab }.

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New lab ventilation standard. ANSI/AIHA Z9.5-2003 affects every lab.

We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. Copying and networking prohibited. Consensus is established z9.5-2003, in the judgment of the ANSI Board of Standards Review, z9.52-003 agreement has been reached by directly and materially affected interests.

Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he or she has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processors, or procedures not conforming to the standards.

The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard.

Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard.

ANSI-AIHA Z – Free Download PDF

This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from ansk date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.

Ajsi in the United States of America. This standard describes required and recommended practices for the design and operation of laboratory ventilation systems used for control of exposure to airborne contaminants.

It is intended for use by employers, architects, industrial hygienists, safety engineers, Chemical Hygiene Officers, Environmental Health and Safety Professionals, ventilation system designers, facilities engineers, maintenance personnel, and testing and balance personnel. The standard is presented in a two-column format.

Appendix 3 provides more detailed information on stack design. Appendix 4 provides a sample audit document and Appendix 5 presents a sample table of contents for a Laboratory Ventilation Management Plan.

Requirements should be considered minimum criteria and can be adapted to the needs of the User establishment. Demonstrably equal or better approaches are acceptable. When standard provisions are in conflict, the more stringent applies. Committee approval of the standard does not necessarily imply that all committee members voted for its approval.

At the time it approved this standard the Z9 Committee had the following members: Name of Representative Alliance of American Insurers. Scholz American Glovebox Society. Crooks American Snsi Hygiene Association. Blair American Insurance Services Group. Behls American Welding Society. Pumphrey Chicago Transit Authority.

Wainless US Department of the Navy. Kramer Individual Members G.

ANSI-AIHA Z9-5-2003

Lou DiBerardinis, Chair D. This standard does not apply to the following types of laboratories or hoods except as it may relate to general laboratory ventilation: It does not apply to comfort or energy considerations unless they have an effect on contaminant control ventilation.


Such laboratories should satisfy several general objectives, in addition to being suited for the intended use: This standard addresses the ventilation requirements to satisfy the first criterion: When techniques and designs are available to reconcile conflicts between safety criteria and other, possibly conflicting demands, they are discussed.

Traditional ventilation system designs typically do not meet all of the foregoing criteria, and most importantly they very often do not ensure adequate safety for the laboratory occupants. Persons responsible for laboratory operations and those working within a laboratory are typically not very knowledgeable about how ventilation systems directly impact laboratory occupant health and safety.

Thus, they may not be aware of inadequate ventilation or other ventilation system deficiencies. On the other hand, ventilation system design professionals cannot be expected to be fully aware of all the particular hazards posed by every type of operation that may occur in a laboratory room. Furthermore, the specific work and operations of some laboratory facilities may need to be kept more confidential and may even be highly secretive. The program should be written and supported by top management.

Management should understand that ventilation equipment is not furniture, but rather it is part of installed capital equipment.

New lab ventilation standard. ANSI/AIHA Z affects every lab.

It must be interfaced to the building ventilation system. The performance of a laboratory chemical hood is ultimately determined by its ability to control chemical exposure to within applicable standards. The containment and capture of z9.-52003 laboratory hood shall be considered adequate if, in combination with prudent practice, laboratory worker chemical exposure levels are asni below applicable in-house exposure limits as recommended in 2.

When these containment sources are not adequate, the laboratory shall conduct a hazard determination to evaluate the situation. If exposure limits [e. Qualified industrial hygienists and toxicologists working in conjunction may be best suited to accomplish this need.

A Laboratory Design Professional must anticipate that toxic and hazardous substances may be used at some point during the lifetime use of the facility. Unless the employer determines, through periodic monitoring, that exposure levels for substances used in laboratory chemical hoods routinely exceed the action levels or, in the absence of action levels, the PELsemployees are not likely to be overexposed. Please be aware that the employer is responsible for ensuring that laboratory chemical hoods are functioning properly and implementing feasible control measures to reduce employee exposures if the exposures exceed the Xnsi.

Morris, 4 April Furthermore, air changes per hour is not the appropriate concept for designing contaminant control systems. Contaminants should be controlled at the source.

General Ventilation The general ventilation system shall be designed to replace exhausted air and provide the temperature, humidity, and air quality required for the laboratory procedures without creating drafts at laboratory chemical hoods.

Replacement air is part of the general ventilation system. In addition there may be need for general room exhaust not through a hood used qnsi contaminant control. Because the exhaust from that type of system must be discharged to the outside or treated intensively before being used as return air, these systems usually are not economical for controlling exposure to hazardous materials compared with use of local exhaust hoods.

The plan should be disseminated and become the basis of employee training. The plan shall address the laboratory operations and procedures that might generate air contamination in excess of the requirements of Section 2. These operations shall be performed inside a hood adequate to attain compliance.


At a minimum, the responsible person should coordinate these activities. Z9.5-2003 of this standard addresses a generic approach to exposure control. Employers shall promote awareness that laboratory hoods are not appropriate control devices anis all potential chemical releases in laboratory work. The practical limits of knowing how each ventilation control is being used in the laboratory shall be considered when specifying design features and performance z9.5-2003 commissioning and routine z9.5-20003.

The responsible person as defined in Section 2. Laboratory chemical hoods shall be functioning properly and specific measures shall be taken wnsi ensure proper and adequate performance. Xnsi employer shall establish criteria for determining and implementing control measures to reduce employee exposure to hazardous chemicals; particular attention shall be given to the selection of control measures for chemicals that are known to be extremely hazardous.

The employer may recommend 2. Alternatively, ensuring all hoods are capable of meeting an AU 0. The following briefly describes an approach used within laboratory ventilation management programs in assigning control measures given the 9z.5-2003 or inability to assess specific day-to-day chemical exposure situations. Hazard assessments in general are geared toward identifying chemicals, their release potential, and their possible routes of entry into the body. The first step in the assessment is to identify what chemical s can be released including normally uncharacterized byproducts.

Will the chemical release have velocity? How has the maximum credible accidental release been accounted for? The overall goal of providing a safe workspace for the end users can be greatly enhanced by the use of a hazard assessment and system design team. Quality of system design and quality of performance are enhanced by utilizing the most appropriate skills and resources available to an organization.

The Laboratory Ventilation Management Plan should describe specific responsibilities for each department involved in the design, installation, aansi, and use of ventilation systems Table 1 provides some guidance.

Laboratory chemical hood performance can impact life cycle sustainability. Recordkeeping Complete and permanent records shall be maintained for each laboratory ventilation system.

Only permanent records will allow a history of the system to be maintained. Records should be kept for at least the life of the system or until the system is altered. The responsible person could be part of any one of the above groups and departments. A Manual of Recommended Practice, and the most current codes, guidelines, and standards and any other applicable regulations and recommendations see Appendix 2.

It is the intent of the standard to establish design parameters and performance criteria and not to limit new and innovative designs. If additional utilities are required, other than ani, they may be located inside the hood provided they have outside cutoffs and can be connected and operated without potentially subjecting the hood operator to exposure from materials in anxi hood or other unsafe conditions.

This is acceptable as long as it does not compromise hood performance. Type of sashes available are as follows: Sashes shall not be removed when zz9.5-2003 hood is in use. The design opening of the hood and the position of the sash-limiting device should be determined by the responsible person based on the needs of the z9.5-003 user. In combination sashes, the horizontal sash panel may be guided in lower roller tracks and overhead guides.

Sashes should be constructed of transparent shatterproof material suitable for the intended use. Sash movement should require no more than 5 lbs.

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