ANSI ASSP Z9.2 Fundamentals governing the design and operation of local exhaust ventilation systems (ASSE Z9.2)

This standard covers design and operation of industrial exhaust systems. Among other things, this standard requires that hazardous and non-hazardous operations be segregated; and inlets cannot be added without engineer approval unless they are part of the original design.

Current edition

ANSI/ASSP Z9.2-2018 Fundamentals Governing The Design And Operation Of Local Exhaust Ventilation Systems

Incorporation by reference

The following editions have been incorporated by reference (IBR) into the Code of Federal Regulations (CFR):

IBR approved for	Overview of requirements	IBR approved edition
29 CFR 1910.94(a)(4)(i)	Employers must ensure the construction, installation, inspection, and maintenance of exhaust systems conform to the principles and requirements set forth in American National Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, Z9.2-1960, and ANSI Z33.1-1961.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(b)(3)(ix)	Employers must ensure that where the work is outside the hood, air volumes are increased as shown in American Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, Z9.2-1960 (section 4, exhaust hoods).	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(b)(4)(i)	Employers must ensure exhaust systems for grinding, polishing, and buffing operations are designed in accordance with American Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(b)(4)(ii)	Employers must ensure exhaust systems for grinding, polishing, and buffing operations are tested in the manner described in American Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(c)(3)(i)	Detailed information on the design and construction of spray booths can be found in ANSI Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(c)(5)(iii)(b)	Detailed information on ventilation for spray finishing operations can be found in American National Standard Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.94(c)(7)(iv)(a)	When otherwise unheated make-up air in a spray booth or room would be at a temperature of more than 10°F. below room temperature, its temperature must be regulated as provided in section 3.6.3 of ANSI Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.124(b)(4)(i)	Employers must ensure that when mechanical ventilation is used, it conforms to the following standard: ANSI Z9.2-1979, Fundamentals Governing the Design and Operation of Local Exhaust Systems.	ANSI Z9.2-1979 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.261(h)(2)(ii)	Employers must ensure that chlorine gas is rendered neutral or harmless before being discharged into the atmosphere in accordance with the requirements of American National Standard Z9.2-1960.	ANSI Z9.2-1960 Fundamentals Governing the Design and Operation of Local Exhaust Systems.
29 CFR 1910.1001(f)(1)(iv)	For work operations involving tools which would produce or release fibers of asbestos, local exhaust ventilation and dust collection systems shall be designed, constructed, installed, and maintained in accordance with good practices such as those found in the American National Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, ANSI Z9.2–1979.	ANSI Z9.2-1979 Fundamentals Governing the Design and Operation of Local Exhaust Systems.

How to purchase

Standards are available for purchase from the American National Standards Institute (ANSI), see webstore.ansi.org, and from the American Society of Safety Professionals (ASSP), see assp.org/publications.

['Specialized Industries', 'Toxic and Hazardous Substances - OSHA', 'Hazardous Materials Safety - OSHA']

['Toxic and Hazardous Substances - OSHA', 'Dipping and Coating', 'Pulp and Paper Mills']

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