NBI manages the development of COMNET, a quality assurance initiative to standardize building energy modeling, by creating consistent baselines relative to various energy codes and standards. COMNET extends and supports existing systems for assessing and rating the energy efficiency of new commercial and multifamily buildings in the United States. The core component of COMNET is a set of guidelines and procedures that governs this standardization. COMNET offers quality assurance services to green building rating agencies, energy code authorities, utility energy efficiency programs, and other programs that rely on, or require, energy models. By creating streamlined processes with technical rigor, institutional credibility, consistency, and versatility, COMNET helps to make the evaluation of building energy models (BEM) more efficient and cost-effective. Specifically, COMNET provides step-by-step guidance on complying with IRS tax deductions (via ASHRAE 90.1-2001) LEED v3 (90.1-2007), and the upcoming LEED v4 (90.1-2010).

The COMNET Modeling Guidelines and Procedures (MGP) has been developed and published for integration into existing building energy modeling software to enable the compliance assessment of the building design. The MGP manual provides a comprehensive framework for modeling the energy performance of new buildings and establishes a set of rules for modeling the actual building and a second set of rules for modeling a baseline, or reference building. For more information:

Visit the COMNET website


COMNET Overview

COMNET Energy Modeling Portal


View On-Demand Webinar: COMNET Portals for Quality Assurance in Energy Modeling

This webinar provides an overview of COMNET and how the COMNET portal collects energy modeling simulation results, performs quality assurance checks and submits the results for EA Prerequisite 2, and EA Credit 1 using the LEED Online process. The initial implementation of the portal is designed specifically for LEED Online, but automating data transfer and quality assurance functions can also be applied to model submittals for code compliance and energy efficiency incentive programs.  (4/2012)