EGUSA 6.1 includes ANSI/RESNET/ICC 301-2014 Addendum E-2018 House Size Index Adjustment Factors (IAF) and you may have already received an email with details from RESNET. There are now two rating calculations; HERS 2014 and HERS 2014 (IAF). RESNET allows the continued use of HERS 2014 for homes that are permitted up until 1/1/19 and also allows the HERS 2014 (IAF) for homes permitted on or after 7/1/18. Thus for smaller homes you may run both and determine which provides the lower HERS Index and select that during the rating registration. There are also two Create RGU options to support IAF and each are labeled.
Please do not hesitate to let us know if you have any questions.