NSF 49-04a Addendum 2.0 PDF

This edition of the Standard, Addendum 2.0 to NSF/ANSI 49-04a, expands the definition of high efficiency filters (3.13) to include specifications for both high efficiency particulate air (HEPA) filters and ultra-lowpenetrating air (ULPA) filters and revisions to rounding errors that affect the pass/fail criteria throughout the document. It also clarifies significant digits in metric and English system conversions.

Revisions from Addendum 1.0 have been added to this document for the convenience of our customers.

ANSI :	ANSI Approved
File Size :	1 file , 240 KB
Note :	This product is unavailable in Ukraine, Belarus, Russia
Number of Pages :	16
Part of :	NSF 49-2004a
Published :	03/01/2005