IES tools meet the following approved international standards.
ASHRAE 140: 2001, 2004, 2007, 2014
EU EN13791: July 2000
IESVE is fully validated under ASHRAE Standard 140 and have published the results for all versions of ASHRAE Standard 140; 2001, 2004, 2007 and 2014 (Heating, Cooling and Envelope).
IES tools can undertake the following methodologies.
ASHRAE 55 Calculation Procedure
ASHRAE 62.1 Calculation Procedure
CIBSE Guide A/ISO 7730 Calculation procedure
UK National Calculation Methodology (NCM)