1 INTRODUCTION 1.1 Background The topic of high performance buildings has gained popularity along with energy efficiency, green build- ings, and sustainable buildings. In this regard, build- ing practitioners are persistently trying to develop more energy efficient buildings while maintaining and/or improving the human comfort to achieve the Architecture 2030, 2025 Commercial Buildings Ini- tiative, and the Net-Zero Commercial Building goals. However, building energy systems often rep- resent more (about 20%) energy consumption than they were expected compared to the building design intent. According to the Bailey et al. (2011), HVAC sys- tems, mainly air distribution systems, and common control systems are the main sources of flaw in the building. Although identifying the specific sources and root causes of energy waste in particular build- ings can be challenging, but it is possible to achieve more than 20% of energy savings by conducting ex- isting building commissioning (Mills, 2010). There- fore, most of the buildings go through the commis- sioning processes during their life to maintain the high building performance level. According to ASHRAE guideline for the commis- sioning process, Cx is a precise documentation pro- cess whose purpose is to ensure that building sys- tems are designed, installed, and functionally tested, and that they are able to be maintained and operated for performance that is in line with design intent (ASHRAE 2005). Through a wide range of research in the scope of building commissioning, several dif- ferent terms have been created to describe the time and process of commissioning such as Re-Cx, retro- Cx, existing building Cx, new building Cx, continu- ous Cx, ongoing Cx, and persistence Cx. After and during the Cx process, some building owners or managers invest in implementing the suggested EEMs in the building, and they want to know how much they have saved and how long their savings will last. The determination of energy savings re- quires both accurate measurement and replicable methodology, known as Measurement and Verifica- tion (M&V) protocol (IPMVP 2001). Nowadays, traditional PM&V approaches can also be too complicated or expensive. Building managers desire to reduce time, cost, and complexity of PM&V. Moreover, access to data via smart meters, devices, and analytics tools has been increased and building managers are showing more interests in multi-measure whole-building programs that can generate deeper savings (Granderson et al. 2015). In general, the Cx and PM&V process requires hiring Cx engineers and takes a long time and hard A Framework for Commissioning and Energy Performance Measurement & Verification in Buildings S. Mirianhosseinabadi & S. Cho North Carolina State University, Raleigh, NC S. Song Korea Institute of Civil Engineering and Building Technology, Gyunggi-Do, Republic of Korea ABSTRACT: Building practitioners work diligently to develop more energy efficient buildings while not compromising human comfort. Building Automation System (BAS) has gained popularity as one of the key information sources for building Commissioning (Cx) and Performance Measurement and Verification (PM&V), which are typical practices for energy efficiency improvements. However, the BAS installed in buildings itself cannot estimate performance level relative to the design intent. It does not inform the build- ing manager of how much energy could be saved from implementing Energy Efficiency Measures (EEMs) after the Cx processes either. This paper presents a framework of integrating Cx and PM&V with BAS and Energy Management & Control System (EMCS) in existing commercial buildings. This framework has been conceptualized based on the Cx and International Performance Measurement & Verification Protocol (IP- MVP) Option-C and D. The framework was tested in a case study using a building located in the Research Triangle Park (RTP), North Carolina. The proposed framework takes advantage of both simulation model- ing and regression analysis in its process to provide the information about potential energy savings and en- ergy efficiency improvements in buildings.