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ASHRAE Guideline 4-2019

Preparation of Operations and Maintenance Documentation for HVAC&R Systems

Guides those responsible for the design, manufacturing, construction, commissioning, and Operation of building HVAC&R and on-site generation systems in the preparation and delivery of operations and maintenance (O&M) documentation that is a) simple to prepare and update, b) delivered on time, c) easy to use, and d) provides accurate and relevant information. Dual units of measurement.

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American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ASHRAE]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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