NOTE: All documents linked from this page are in 
PDF-format.
Interpretation 15-2007-1 – June 27, 2010 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2007, Section 7.3, regarding volume calculations for heavier than air refrigerants.)
Interpretation 15-2007-2 – January 30, 2011 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2007, Section 7.3.1, regarding nonconnecting spaces and volume calculations.)
Interpretation 15-2007-3 – January 30, 2011 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2007, Section 7.3.2, regarding ventilated spaces and volume calculations.)
Interpretation 15-2007-4 – January 30, 2011 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2007, Section 7.2.1 and Table 1, regarding refrigerant limits and institutional occupancies.)
Interpretation 15-2007-5 – January 30, 2011 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2007, Section 7.3, regarding volume calculations and permanently installed furniture and fixtures.)