(ANSI/AIHA Z, ). face velocity – average velocity of air moving perpendicular to the hood face, usually expressed in feet per minute (fpm) or meter per. ANSI/AIHA Z American National Standards for Laboratory Ventilation. Laboratory Chemical Hoods. Adequate laboratory chemical hoods, special . This standard informs the designer of the requirements and conflicts among various criteria relative to laboratory ventilation, informs the user of information.

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In addition to maintaining proper hood face velocity, laboratory hoods shall maintain a minimum exhaust volume to ensure that contaminants are properly diluted iaha exhausted from hood.

Ductless hoods are equipped with carbon filters and pre-filters that can be customized to a variety of chemical families. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.

Risks to laboratory security include, but are not limited to: Please first verify your email before subscribing to alerts. Also regardless of standard best practice is to assure you have appropriate lab security programs to safeguard hazardous materials.


Your Alert Profile lists the documents that will be monitored. The security plan should clearly delineate response to security issues, including the coordination of institution and laboratory personnel with both internal and external responders.

You may delete a document from your Alert Profile at any time. Before I delve into the minimum flow rate issue I want to xiha a concept that is often lost on EHS and design professionals and the management teams we report to. As the voice of the U. Standards Subsctiption may be the perfect solution. NFPA and CFR 29 Part provide additional regulations to which ducted and ductless fume hoods must adhere to ensure operator safety across a wide range of procedures.


If I were working on specifications for a new laboratory building requiring hoods or on a specification for modifying or adding a laboratory ventilation system to an existing facility, I would pull key elements of the LVMP plan and write them into my design specification bid document. Chemical-specific detectors located downstream of adsorption media and pressure drop meters can help ensure effective contamination filtering based on xiha TLV for known chemical families.

Update to chapter 4.

AIHA Z Update – PDF Free Download

The following considerations shall be taken into account as applicable when setting the minimum hood flow rate for each hood: The efficiency of carbon filtration relates to how effectively a carbon filter is able to capture target contaminants from a ductless fume hood, while maintaining turbulence-free airflow in the hood. This standard is also available to be included in Standards Subscriptions. Ductless fume hoods are held to the same stringent regulatory standards as ducted fume hoods for operator safety and construction.

Subscription pricing is determined by: You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. It also establishes best practices for laboratory ventilation systems to protect personnel from overexposure to harmful or potentially harmful airborne contaminants generated within the laboratory and decommissioning.

AIHA Z9.5 Update

For starters the section on Laboratory Ventilation Management Plan section 2. Proceed to Checkout Continue Shopping. Learn more about ductless hood filters x9.5 the standards they adhere to by visiting Filtco Filters.

Need more than one copy? There is also a tendency on the part of manufacturers, vendors and facilities groups to focus on the energy saving features of new laboratory hoods. Click here to learn more about advanced ductless fume hood alarm systems.

Carbon Filtration Efficiency The efficiency of carbon filtration relates to how effectively a carbon filter is able to capture target contaminants from a ductless fume hood, while maintaining turbulence-free airflow in the hood. Specifically, face velocities that operate within the range of fpm provide adequate face velocity to evacuate the majority of hazardous chemicals, assuming proper containment characteristics throughout the rest of the ductless hood.


The new Standard in section 3.

Layered carbon filtration beds can provide protection from multiple chemicals at once. The pertinent section reads as follows: Security systems in the laboratory are used to detect and respond to a security breach, or a potential security breach, as well as to delay criminal activity by imposing multiple layered barriers of increasing stringency. My exhortation before reviewing the minimum flow rate section of the standard is to emphasize again that design minimums need to be evaluated in the context of hazard assessment.

Many models are now equipped with extremely advanced audible and visible alarms. Ventilation system designers shall coordinate the operating range of the fume hood flow rate with the operating ranges of the aansi air supply and exhaust devices in the room. If the document is revised or amended, you will be notified by email. The air cleaning performance of ductless fume hoods must be evaluated to ensure proper filtration is taking place. This section now includes a mention of exposure assessment, a key component of determining the efficacy of a control device.

Please first log in with a verified email before subscribing to alerts. Learn more about layering carbon filters here. In fact, in many cases ductless fume hoods exceed existing laboratory standards and requirements. Already Subscribed to this document. Read more about application evaluations of ductless fume hoods or start a new evaluation of your application here.