NEMA LSD 58-2017 Air Infiltration Ratings for Recessed Luminaires.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA LSD 58-2017Air Infiltration Ratings for Recessed LuminairesA NEMA Lighting Systems Division Document LSD 58-2017 Air Infiltration Ratings for Recessed Luminaires Prepared by NEMA Luminaire Section National Electrical Manufac

2、turers Association 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 The requirements or guidelines presented in this document, a NEMA Lighting Systems Division white paper, are considered technically sound at the time they are approved for publication. They are not a substitute for a product

3、 sellers or users own judgment with respect to the particular product discussed, and NEMA does not undertake to guarantee the performance of any individual manufacturers products by virtue of this document or guide. Thus, NEMA expressly disclaims any responsibility for damages arising from the use,

4、application, or reliance by others on the information contained in these white papers, standards, or guidelines. The opinions expressed in this statement represent the consensus views of the member companies of the Lighting Systems Division of the National Electrical Manufacturers Association. The m

5、embers of the Lighting Systems Division manufacture indoor and outdoor lamps, which include: incandescent, fluorescent, light-emitting diode, and solid state lamps, lighting fixtures, and lamp ballasts. www.nema.org 2017 National Electrical Manufacturers Association. All rights, including translatio

6、n into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. NEMA LSD 58-2017 Page 2 2017 National Electrical Manufacturers Association Introduction Ene

7、rgy codes and ENERGY STARqualification require limiting air infiltration (leakage) through recessed luminaires (fixtures). The goal is to restrict passage of conditioned air and moisture through a recessed luminaire into unconditioned space in order to reduce energy loss and moisture accumulation. B

8、ecause such luminaires are usually installed in the outer envelope of a building in areas that are provided with thermal insulation, they are also typically rated for insulation contact, but the two requirements are not directly related. Many codes allow various routes for compliance with this air i

9、nfiltration requirement: 1) A luminaire construction that passes a test demonstrating limited airflow; 2) Installation of a vapor barrier over the luminaire; or 3) Installation of a sealed box surrounding the luminaire. This paper will focus on the luminaire construction that passes a test demonstra

10、ting limited airflow and will explain the standard test procedure, installation requirements, and labeling applicable to such luminaires. This information is useful for those testing, producing, specifying, installing, and inspecting these luminaires. ASTM E283 Testing ASTM E2831contains the procedu

11、re used to test luminaires for air infiltration. This standard was originally developed to test windows and doors but has been adopted for other penetrations in the building envelope, such as luminaires. The test involves installation of the luminaire in accordance with the manufacturers installatio

12、n instructions into a panel that represents a building surface. This panel is installed into an apparatus that establishes a differential pressure of 75 Pascals (1.57 psf) across the luminaire. The airflow needed to maintain the static pressure differential is measured and represents the air infiltr

13、ation through the luminaire. The established limit for this air flow is 2.0 cubic feet per minute (cfm). Tests are conducted at third party facilities or manufacturers test laboratories. Installation Instructions Since compliance with the air infiltration tests is dependent upon proper installation,

14、 all special installation procedures must be observed along with the normal product installation steps. Accordingly, it is critical that the installation instructions provided with the luminaire are read, understood, and followed. To prevent excess air flow, the interface between the luminaire and b

15、uilding surface must typically be provided with a seal. Some manufacturers specify a caulking material or provide gaskets or similar sealing materials that must be applied as instructed to prevent air leakage. The instructions will describe proper seal application or might identify specific finishin

16、g sections or trims that must be used to complete the installation. Any questions concerning installation issues should be directed to the manufacturer of the luminaire. In addition to the product installation instructions, all applicable codes and regulations must also be observed. Labeling The lum

17、inaire industry has successfully implemented a voluntary labeling program for compliant products. This voluntary program has been successfully implemented for over 15 years and is recognized by 1American Society for Testing and Materials (ASTM) E283 04 (2012), Standard Test Method for Determining Ra

18、te of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen. www.astm.org/Standards/E283.htm NEMA LSD 58-2017 Page 3 2017 National Electrical Manufacturers Association EPA/DOE for ENERGY STAR product qualification and at the local jur

19、isdictional level for energy code inspection purposes2. Under this industry standard, the luminaire itself bears a label certifying “air seal,” “air tight,” or similar designation and “ASTM E283 tested 2.0 CFM at 75 Pascals.” The label is placed at a location on the product that will be visible duri

20、ng building inspection. Luminaire manufacturers also typically include a statement describing compliance with the ASTM E283 testing on product specification documents. 2For more information, visit www.energystar.gov/index.cfm?c=new_homes_features.hm_f_reduced_air_infiltration NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB