scope:

FOREWORD

Addendum b adds Section 6.12, "Energy Modeling," to the standard. The purpose of these changes is to offer guidance when modeling an HVAC system that includes variable-refrigerant- flow (VRF) equipment. Often, a VRF system is considered as a stand-alone product and is modeled accordingly. Instead, the committee feels the VRF product should be viewed holistically as a component of an integrated system. The following recommendations are intended to guide the design and modeling professional in the creation of their integrated model.

Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and strikethrough (for deletions) unless the instructions specifically mention some other means of indicating the changes.