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Interpretation 90.1-2004-1 - June 25, 2005 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 5.2.1 Compliance, relating to gross wall area.)
Interpretation 90.1-2004-2 - January 21, 2006 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.5.3.1 Fan Power Limitation, and Table 6.5.3.1, specifically relating to fan power limitation ratios.)
Interpretation 90.1-2004-3 - January 22, 2006 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.5.6.1 Exhaust Air Energy Recovery, specifically relating to Exception (i) to 6.5.6.1, ventilation air treatment for systems requiring dehumidification.)
Interpretation 90.1-2004-4 - January 23, 2006 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 11.3.2(d) HVAC Systems, relating to minimum outdoor air ventilation rates to be used for the budget building design and the proposed building.)
Interpretation 90.1-2004-5 - January 23, 2005 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Table 6.8.1A and Table 6.8.1B requiring a 12.0 SEER and 7.4 HSPF for less than 65,000 Btu/h cooling capacity machines.)
Interpretation 90.1-2004-6 - January 28, 2007 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Sections 6.2 and 6.4.1.1 and Table 6.8.1C relating to mandatory equipment efficiency requirements for water cooled chillers.)
Interpretation 90.1-2004-7 - April 2, 2007 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Table 3.1 and Sections 3.2 and 5.4.3.4, regarding vestibules.)
Interpretation 90.1-2004-8 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G2.4 relating to energy rates.)
Interpretation 90.1-2004-9 - October 13, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 11.3.2 and Table 11.3.2A, regarding the Energy Cost Budget Method – Budget Systems Modeling.)
Interpretation 90.1-2004-10 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 11, Figure 11.3.2 and Table 11.3.2A, related to the Energy Cost Budget Method and determination of the Budget System Type for geothermal water to water heat pumps.)
Interpretation 90.1-2004-11 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.5.2.1, regarding the reduction of zone air volume before reheat is allowed.)
Interpretation 90.1-2004-12 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, 6.5.2.1, Exception (b), regarding reheat.)
Interpretation 90.1-2004-13 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.5.7.2(a), regarding fume hood VAV.)
Interpretation 90.1-2004-14 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.4.1.2 and Tables 6.8.1C and 6.8.1H through J, regarding centrifugal chiller efficiencies.)
Interpretation 90.1-2004-15 - October 12, 2007 (refers to the requirements in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.4.1.2 and Tables 6.8.1C and 6.8.1H through J, regarding centrifugal chiller efficiencies.)
Interpretation 90.1-2004-16 - March 19, 2008 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 5.5.4.2.2, regarding skylights)
Interpretation 90.1-2004-17 - April 12, 2008 (refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 2.3(c), regarding the Scope and the applicability of the Standard to Commercial Datacom Facilities.)
Interpretation 90.1-2004-18 - June 21, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3.1.2.5, regarding ventilation rate and outdoor air (OA) volume.)
Interpretation 90.1-2004-19 - June 21, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Sections G2.2, G2.5 and G3.1, regarding the application of exceptional calculation methods and nonstandard efficiency measures to model energy for systems utilizing elevated air speed to increase the maximum temperature for acceptable comfort.)
Interpretation 90.1-2004-20 - June 22-23, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 2.3(c), regarding the Scope and the applicability of the Standard to Commercial Datacom Facilities, and interpretation IC 90.1-2004-17.)
Interpretation 90.1-2004-21 - June 21, 2008 (Refers refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 9.6.1 and Table 9.6.1, regarding Atrium lighting power density.)
Interpretation 90.1-2004-22 – October 3, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Table 9.6.1, Lighting Power Densities Using the Space-by-Space Method, regarding space types.)
Interpretation 90.1-2004-23 – October 3, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3 and Table G3.1, regarding building envelope and the calculation of proposed and baseline building performance.)
Interpretation 90.1-2004-24 – October 3, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 2.3(c), regarding the Scope and the applicability of the Standard to Commercial Datacom Facilities, and Interpretation IC90.1-2004-20 approved June 22 and 23, 2008.)
Interpretation 90.1-2004-25 – October 3, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3.1 and Table G3.1, No. 4, regarding schedules for the proposed and baseline buildings.)
Interpretation 90.1-2004-26 – October 3, 2008 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Sections 5.8.2, 5.8.2.1 and 5.8.2.2, regarding fenestration rating and labeling.)
Interpretation 90.1-2004-27 – January 24, 2009 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3.1 and Table G3.1, regarding purchased chilled water.)
Interpretation 90.1-2004-28 – January 24, 2009 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 9.1.2, regarding lighting alterations.)
Interpretation 90.1-2004-29 – January 24, 2009 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Sections 94.1.1 and 9.4.1.2, regarding interior lighting control.)
Interpretation 90.1-2004-30 – January 24, 2009 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3.1.3.7, regarding type and number of chillers used in the baseline building.)
Interpretation 90.1-2004-31 - April 24, 2009 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 6.4.3, regarding HVAC system control and set point overlap restriction.)
Interpretation 90.1-2004-32 - April 7, 2011 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 3.2, regarding the definitions for conditioned and semi-heated spaces as they relate to an existing “big box” shell warehouse.)
Interpretation 90.1-2004-33 – October 22, 2011 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section 9.1.1, Exception (c), regarding the exception for health or safety lighting.)
Interpretation 90.1-2004-34 – June 27, 2010 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Table G3.1 and Sections G3.1.2.8 and 3.1.2.9, regarding modeling requirements for baseline fan power.)
Interpretation 90.1-2004-35 – October 21, 2017 (Refers to the requirements presented in ANSI/ASHRAE/IESNA Standard 90.1-2004, Section G3.1.3.15, regarding VAV Fan Part-Load Performance.)