ASHRAE standards establish consensus for test methods and performance criteria. These include voluntary consensus standards for Method of Measurement or Test, Standard Design and Standard Practice. Consensus standards define minimum values or acceptable performance. ASHRAE is accredited by the American National Standards Institute (ANSI) and follows ANSI's requirements for due process and standards development.
A N HVAC system maintains desired environmental conditions in a space. In almost every application, many options are available to the design engineer to satisfy a client’s building program and design intent. In the analysis, selection, and combination of these options, the design engineer should consider the criteria defined here, as well as project-specific parameters to achieve the functional requirements associated with the project design intent. The design engineer should consider sustainability as it pertains to responsible energy and environmental design, as well as constructability of the design.
This standard specifies equipment and procedures for measuring air speed and air temperature in occupied zones of building spaces. This standard applies to furnished or unfurnished spaces (actual or mock-up), with or without occupants. This standard applies to air distribution systems, including systems in which a. air outlets are located inside, inside and outside, or outside of the occupied zone and b. local air velocities in the occupied zone are or are not under control by individual occupants. This standard does not cover a. rating of individual air outlets and inlets or b. naturally ventilated building spaces. PURPOSE The purpose of this standard is to define a repeatable method of testing the steady-state air diffusion performance of an air distribution system in occupied zones of building spaces. This method is based on air velocity and air temperature distributions at specified heating or cooling loads and operating conditions.