(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 fact, in many cases ductless fume hoods exceed existing laboratory standards and requirements. Ductless hoods are equipped with carbon filters and pre-filters that can be customized to a variety of chemical families. You can download and open this file to your own z9.

but DRM prevents opening this file on another computer, including a networked server. Click here to learn more about advanced ductless fume hood alarm systems. Update to chapter 4. Learn more about layering carbon amsi here.

Read more about application evaluations of ductless fume hoods or start a new evaluation of your application here. 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.

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.


Chemical-specific detectors located downstream of adsorption media and pressure drop meters can help ensure effective contamination filtering based on existing TLV for known chemical families. The air ajsi performance of ductless fume hoods must be evaluated to ensure proper filtration is taking place.

Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Carbon Filtration Efficiency The efficiency of carbon filtration z95 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.

AIHA Z9.5 Update

In addition to maintaining proper hood face velocity, laboratory hoods shall maintain a minimum exhaust volume to ensure that contaminants are properly diluted and exhausted from hood. Your Alert Profile lists the documents that will be monitored. Proceed to Checkout Continue Shopping. 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.

The following considerations shall be taken into account as applicable when setting the minimum hood flow rate for each hood: Need more than one copy?

AIHA Z Update – PDF Free Download

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. The pertinent section reads as follows: The new Standard in section 3. Before I delve into the minimum flow rate issue I want to reiterate a concept that is often lost on EHS and design professionals and the management teams we report to.


Risks to laboratory security include, but are not limited to: 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. Ventilation system designers shall coordinate the operating range of the fume hood flow rate with the operating ranges of the other air supply and exhaust devices in the room.

ANSI – Laboratory Ventilation Standard – Z –

This standard is also available to be included in Standards Subscriptions. You may delete a document from your Alert Profile at any time. For starters the section on Laboratory Ventilation Management Plan section 2. Layered carbon filtration beds can provide protection from multiple chemicals at alha. Many models are now equipped with extremely advanced audible and visible alarms.

Subscription pricing is determined by: Please first log in with a verified email before subscribing to alerts. Also regardless of standard best practice is to assure you have appropriate lab security programs to safeguard hazardous materials.

This section now includes a mention of exposure assessment, a key component of determining the efficacy of a control device. If the document is revised or amended, you will be notified by email.