Maintain the Clean. A Practical Guide to ASHRAE Standard 170. 7.1 I Space Ventilation Table 7.1 • Design parameters for. Interpretation 170-2008-5 – May 15, 2013 (Refers to the requirements in ANSI/ASHRAE/ASHE Standard 170-2008, Table 7-1, requirements for Operating Rooms and Sterile Storage to both be positive.) Interpretation 170-2008-6 – June 25, 2013 (Refers to the requirements in ANSI/ASHRAE/ASHE Standard 170-2008, Section 7.1.1b, regarding ventilation.
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