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Energy Modeling
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Basics & Theory

BOABC: Energy Modeling & Energy Auditing
Building Officials Association of BC online slide show presentation Energy Modeling and Energy Auditing covers definitions, applications, process, who does it, examples, and how to verify. (PDF)

PBC: Static & Dynamic Modeling Tools
Passive Buildings Canada online video begins to explain the two types of energy modeling, static and dynamic.
Education & Training

BCIT: Energy Modelling For Building Professionals
BCIT course CESA 7100 Energy Modelling for Building Professionals introduces the principles, procedures and benefits of energy modelling to enable building professionals to usefully and efficiently incorporate energy modelling into the design process.
Industry Sectors

COMNET: Commercial Energy Services Network
Commercial Energy Services Network, an initiative of RESNET, extends and supports existing systems for assessing and rating the energy efficiency of commercial and multifamily buildings in the United States. It consists of a modeling rules component focusing on development of rules and procedures for energy modeling, and is developing a quality assurance component for credentialing and holding accountable energy raters and energy auditors.

IBPSA BC: International Building Performance Simulation Association Of BC
International Building Performance Simulation Association of BC is the local chapter of a non-profit international society of building performance simulation researchers, developers and practitioners, dedicated to improving the built environment. Membership in the BC Chapter is free.
Information Sources

Home Energy Pros: Discussion Forum On Building Simulation
Home Energy Pros discussion form on building simulation covers topics relating to home energy audits and retrofits.
Issues & Performance

BDC: Reconciling Design Energy Models With Real World Results
Building Design & Construction explores the benefits and challenges of energy modeling and how design firms can implement standards for the highest possible accuracy.

BPI: Qualification Of Whole-House Energy Savings Predictions By Calibration To Energy Use History
Building Performance Institute standard ANSI/BPI-2400-S-2012 Standard Practice for Standardized Qualification of Whole-House Energy Savings Predictions by Calibration to Energy Use History, specifies a process for the calculation of standardized predicted savings: the difference (delta) between the modeled energy usage before and after an upgrade using approved building energy use simulation software. The process uses actual home energy bills to predict savings, and provides a set of standardized operating conditions to be used in the final calculation of predicted savings. The standard applies to existing detached single-family dwellings and townhouses that meet the specific criteria detailed in the scope. (PDF)

BPI: Standardized Qualification of Whole House Energy Savings Estimates
Building Performance Institute standard BPI-2400-S-2011: Standardized Qualification of Whole House Energy Savings Estimates is now available for public comment. IT specifies a process for the calculation of standardized estimated savings: the difference (delta) between the modeled energy usage before and after an upgrade using approved building energy use simulation software. The process uses actual home energy bills to estimate savings, and provides a set of standardized operating conditions to be used in the final calculation of estimated savings. The standard applies to residential buildings of 4 units or less.

GBA: Energy Modeling Isn't Very Accurate
Green Building Advisor says before spending time or money on energy modeling, it's important to know its limitations.

GBA: Why Green Buildings Donít Live Up to Hype on Energy Efficiency
Green Building Advisor says analysts call it the energy performance gap, but the problem is inept modeling systems that fail to capture how buildings really work.

NREL: Test Procedure For Energy Analysis Software
National Renewable Energy Laboratory test procedure increases the quality and accuracy of energy analysis tools for the building retrofit market. (PDF)

RDH: Energy Savings In High-Performance Buildings
RDH Building Science describes how we measure and verify energy savings in new buildings.

RDH: Where Models Differ From Reality
RDH Building Engineering describes lessons learned through measurement and verification of high performance buildings.

Yale E360: Why Green Buildings Donít Live Up to Hype on Energy Efficiency
Yale Environment 360 says there is a problem with inept green building modeling systems that fail to capture how buildings really work.
Procedures

AIA: Architect's Guide To Integrating Energy Modeling In The Design Process
American Institute of Architects has put together An Architect's Guide to Integrating Energy Modeling in the Design Process. The guide is an exhaustive, step-by-step map to predicting (and thus reducing) the energy usage of buildings. Free registration required.

Home Energy: Energy Modelling Old Homes
Home Energy magazine says the biggest errors occur in modeling estimates of energy use in older homes; usually post-retrofit energy use is pretty close to modeled estimates, but pre-retrofit use is dramatically overestimated because of poor assumptions, biased inputs, and bad algorithms.

NREL: Thermal Performance Of Uninsulated Wall To Improve Accuracy Of Energy Simulation
US National Renewable Energy Laboratory report Thermal Performance of Uninsulated Wall to Improve the Accuracy of Building Energy Simulation Tools describes research to develop models of uninsulated wall assemblies that help to improve the accuracy of building energy simulation tools when modeling potential energy savings in older homes. (PDF)

PBC: Modeled vs Actual Performance
Passive Buildings Canada online video discusses the aspects it takes to create an energy model on a conceptual level.

RJC: Whole Building Energy Modelling Tools To Assess Building Performance
Read Jones Christoffersen describes how modelling tools are increasing being used in quantifying energy performance in new and retrofit construction projects. (PDF)

US DOE: Building America House Simulation Protocols
Building America online House Simulation Protocol document provides guidance to program partners and managers so they can compare energy savings for new construction and retrofit projects. (PDF)

US DOE: Building Component Library For Modeling Data
US Department of Energy online Building Component Library is a searchable library of energy modeling building blocks and descriptive metadata. Users can use the freely available and uniquely identifiable components to create energy models and cite the sources of input data, which will increase the credibility and reproducibility of their simulations. It contains components which are the building blocks of an energy model. They can represent physical characteristics of the building such as roofs, walls, and windows, or can refer to related operational information such as occupancy and equipment schedules and weather information. Each component is identified through a set of attributes that are specific to its type, as well as other metadata such as provenance information and associated files.

US DOE: Improving Accuracy Of Energy Analysis For Residential Buildings
US Department of Energy paper Assessing & Improving Accuracy of Energy Analysis for Residential Buildings focuses on improving whole-building energy analysis methods that employ annual building energy simulations. These methods involve feld data collection procedures, simulation protocols, and software test suites. (PDF)
Product Supply

Best Directory: Directory Of Software Programs For Buildings & Energy
Best Directory provides information on building software tools for evaluation energy efficiency, renewable energy, and sustainability in buildings. Tools listed include databases, spreadsheets, component and systems analyses, and whole-building energy performance simulation programs.

IES: Unique New Partnership Between IES & Google Sketchup Announced
Integrated Environmental Solutions has announced a unique new partnership between IES, and developers of the fast and intuitive 3D modeling tool Google SketchUp. Solidifying the existing relationship between the two companies, which has been built over the last two years, this official partnership will support both partiesí drive to facilitate and encourage wide-spread, low-energy sustainable building design and to provide the worldwide audience with important tools that support this movement.

NRCan: Free Energy Savings Toolbox For Planning Industrial Energy Savings
Natural Resources Canada offers free Energy Savings Toolbox that provides step-by-step methodology to help industry identify and capitalize on energy savings. It offers a detailed reference for understanding and managing energy use in every phase of an operation, from designing and conducting an energy audit to carrying out cost-benefit analyses. (PDF)

NRCan: Free Software For Buildings & Clean Energy Analysis
Natural Resources Canada offers a number of different free software programs for simulating building performance and renewable energy systems.
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