ASHRAE 90 1-2013 I-P INT 1-2013 Energy Standard for Buildings Except Low-Rise Residential Buildings.pdf

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1、Page 1 of 1 2013 ASHRAE. All Rights reserved. INTERPRETATION IC 90.1-2013-1 OF ANSI/ASHRAE/IES STANDARD 90.1-2013 Energy Standard for Buildings Except Low-Rise Residential Buildings Date Approved: October 18, 2013 Request from: SSPC 90.1 Envelope Subcommittee Reference: This request for interpretati

2、on refers to the requirements presented in ANSI/ASHRAE/IES Standard 90.1-2013, Section 5.5.4.6, Exception 5, relating to a definition for sidelighting effective aperture. Background: Exception 5 to Section 5.5.4.6 includes the term “sidelighting effective aperture”. This term was defined in ASHRAE/I

3、ES Standard 90.1-2010 and further modified by Addendum ds-2007, but the definition does not appear in Standard 90.1-2013. Interpretation: When using Exception 5 to Section 5.5.4.6, the correct definition for “sidelighting effective aperture” reads as follows: sidelighting effective aperture: relatio

4、nship of daylight transmitted through vertical fenestration to the primary sidelighted area. The sidelighting effective aperture is calculated according to the following formula: Sidelighting Effective Aperture = Vertical Fenestration Area Vertical Fenestration VT Primary Sidelighted Area where window VT is the visible transmittance of windows as determined in accordance with Section 5.8.2.6. Question: Is this interpretation correct? Answer: Yes.

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