Energy conservation–and especially comfort as obtained by air distribution–depends to a great extent on uniform ratings and applications of performance data of air outlets. This paper presents the latest approaches to the testing, rating, and certification of outlets and inlets, which emphasize uniform ratings and reporting.
Methods of testing air outlets and inlets are given in ASHRAE Standard 70-72, the ADC 1062 R-4 Certification, Rating and Test Manual, and the IS0/DIS 5219 Draft International Standard, "Air Distribution and Air Diffusion–Laboratory Aerodynamic Testing and Rating of Air Terminal Devices." These standards show similar test procedures with varying numbers of performance parameters covered. For example, the only standard that provides a procedure for obtaining sound data is the ADC manual. It is not the intent here to review the detailed test procedures given in these manuals but rather to emphasize the data required for the forthcoming ADC Certification Program. All of these standards have provision for obtaining the data, except for sound as noted above.
The certification procedure requires data to be presented on static and total pressure drop, noise criteria sound levels, and throw and area factors. It also provides time frames and tolerances for check tests to be conducted in an independent laboratory. Periodic check tests to prove the catalog data to be within the listed tolerances provide the assurance of dependable certified data.
An alternate test setup for testing pressure, airflow factors, and sound and throw characteristics of supply outlet and return inlets provides the basis for simplified testing, certification, and check testing procedures. The alternate setup was first introduced in the ADC 1062-R4 Certification, Rating, and Test Manual and was also incorporated in the ISO/DIS 5219 Standard.
Because of the emphasis placed on alternate test installation B in the certification program, a large part of this paper compares this setup to the primary test installation. The two installations are described and data obtained from outlets from the two are compared. The advantage of this in-stallation in the testing of inlets is clearly shown.
Citation: ASHRAE Transactions, 1983, vol. 89, pt. 1B, Atlantic City, NJ
Product Details
- Published:
- 1983
- Number of Pages:
- 10
- File Size:
- 1 file , 830 KB
- Product Code(s):
- D-AC-83-04-3
