- Why Software Knowledge Is Tested on the BEMP Exam
- How Software Maps Across the Four BEMP Domains
- Core Simulation Engines You Must Know
- Workflow and Supporting Tools
- Software Comparison: Capabilities at a Glance
- Domain-Specific Software Depth
- Building Your Software Study Plan
- Frequently Asked Questions
- The BEMP exam tests conceptual software knowledge across all four domains, not hands-on software operation.
- Domain 2 (Components of Building and Energy Systems, 29%) carries the heaviest software-related content weight.
- EnergyPlus, eQUEST, and OpenStudio are the most frequently referenced simulation engines in BEMP study materials.
- Domain 4 (Interpretations of Energy Model Results, 27%) requires knowing how to read and validate software outputs, not just produce them.
Why Software Knowledge Is Tested on the BEMP Exam
The Building Energy Modeling Professional (BEMP) credential is administered by ASHRAE and is designed to distinguish practitioners who can rigorously model, analyze, and interpret building energy performance. Unlike certifications that focus purely on design theory, the BEMP exam assumes you work-or will work-with actual simulation software as part of your professional practice.
That said, the exam does not ask you to click through a software interface. There are no screen-based simulations or software operation tasks. Instead, you are tested on your conceptual understanding of what different tools do, what inputs they require, what assumptions they make, and how to interpret the outputs they produce. A question might describe an energy model scenario and ask you to identify which modeling approach or tool limitation is most relevant to the outcome.
This distinction matters enormously when you study. Practitioners who have used EnergyPlus extensively sometimes underperform on software-related questions because they know the mechanics of the software but have not thought critically about its theoretical underpinnings. Candidates who have never opened eQUEST but who understand its DOE-2 simulation engine, its input data hierarchy, and its output structure often outperform them.
How Software Maps Across the Four BEMP Domains
The BEMP exam is organized into four domains, each of which touches software knowledge in a distinct way. Understanding this mapping helps you prioritize what to study rather than reviewing every feature of every tool.
Domain 1: Establishing the Modeling Scope (17%)
This domain asks candidates to define what a model needs to accomplish before any software is opened. Software appears here in the context of tool selection: given a project's goals, regulatory context, and available data, which simulation engine or workflow is appropriate?
- Understanding the difference between whole-building annual simulation tools and load calculation tools
- Recognizing when simplified tools (like bin-method calculations) are acceptable versus when hourly dynamic simulation is required
- Knowing software capabilities relative to ASHRAE 90.1 baseline modeling requirements
- Identifying data gaps that affect tool selection
Domain 2: Components of Building and Energy Systems (29%)
This is the highest-weighted domain and the most software-dense. It requires deep knowledge of how building components-envelope, HVAC, lighting, plug loads, and renewables-are represented inside simulation engines. Every major tool handles these components differently, and the exam exploits those differences.
- How EnergyPlus models heat transfer through multi-layer constructions using conduction transfer functions
- How HVAC system types are defined in eQUEST versus OpenStudio/EnergyPlus workflows
- How daylighting controls, occupancy sensors, and schedules interact in a simulation
- Thermal mass representation and its effect on peak load timing
- Renewable energy system inputs (PV, solar thermal) and how tools account for them
Domain 3: Applications of Energy Models for Buildings (27%)
Domain 3 moves from component knowledge to applied modeling scenarios: code compliance, green building certification, energy auditing, and design optimization. Software knowledge here is contextual-which tool is appropriate for which application, and what are the limitations?
- Using energy models for LEED EAp2 compliance and understanding the modeling rules imposed by ASHRAE 90.1 Appendix G
- Calibration methodology for existing building models
- Parametric analysis and how tools like OpenStudio Measures or DesignBuilder scripting enable it
- Uncertainty and sensitivity analysis concepts
Domain 4: Interpretations of Energy Model Results (27%)
This domain is where software knowledge meets critical thinking. Candidates must interpret outputs, identify errors, validate results against benchmarks, and communicate findings. Many exam questions in this domain present a set of model results and ask what is wrong, what is missing, or what the results imply for the building design.
- Reading end-use breakdowns and identifying anomalies
- Comparing simulated EUI against measured data or CBECS benchmarks
- Understanding convergence issues, unmet load hours, and what they indicate
- Reporting results in the context of ASHRAE 90.1 performance compliance
Core Simulation Engines You Must Know
EnergyPlus
EnergyPlus is developed by the U.S. Department of Energy and is the reference engine behind many graphical front-ends. For the BEMP exam, you need to understand its heat balance algorithm, its IDF (Input Data File) structure conceptually, its handling of natural ventilation and infiltration, and how it reports zone-level and system-level outputs. EnergyPlus is used as the underlying engine for OpenStudio, DesignBuilder, and several other interfaces, so understanding it gives you leverage across multiple tools.
eQUEST
eQUEST is built on DOE-2.2 and remains widely used in practice, particularly for LEED compliance modeling and Title 24 work in California. The exam tests your understanding of its system/zone/plant hierarchy, the way it handles HVAC systems through predefined system types, and its hourly simulation approach. Understanding how eQUEST simplifies some of the physics that EnergyPlus handles explicitly is an important conceptual distinction the exam explores.
OpenStudio
OpenStudio is NREL's open-source platform that provides a graphical interface and a Ruby-based scripting environment for EnergyPlus models. For the BEMP exam, the key concepts are how OpenStudio Measures work (scripted modifications to a model), how the OpenStudio workflow enables parametric analysis, and how the platform connects to EnergyPlus for simulation and post-processing. Employers doing high-volume code compliance or sustainability consulting often expect OpenStudio familiarity, making it valuable beyond the exam itself.
Trace 700 and HAP
Carrier's HAP (Hourly Analysis Program) and Trane's Trace 700 are commercial tools used heavily in mechanical engineering practice for HVAC system sizing and energy analysis. The BEMP exam acknowledges these tools in the context of system-level modeling and load calculations. You should understand where they fit in the modeling workflow-particularly how they differ from whole-building research-grade tools like EnergyPlus in terms of intended use and output granularity.
Workflow and Supporting Tools
SketchUp and Geometry Creation
Building geometry is an input to every simulation engine, and the BEMP exam tests your understanding of how geometry is created, simplified, and imported. OpenStudio's SketchUp plugin and the OpenStudio Application's built-in geometry editor are common entry points. You should understand the concept of thermal zoning-how a building is divided into zones for simulation purposes-and how zoning decisions affect both model accuracy and computational efficiency.
Weather Data and EPW Files
Every simulation requires weather data. The EnergyPlus Weather (EPW) format is the standard for most tools in the BEMP ecosystem. Exam questions touch on how weather data is selected, the difference between TMY (Typical Meteorological Year) and AMY (Actual Meteorological Year) data, and how weather file selection affects results. This is a Domain 1 and Domain 4 topic that trips up candidates who think of weather data as a trivial input.
Post-Processing and Visualization
Tools like ResultsViewer, OpenStudio's results summary dashboards, and Excel-based post-processing are part of the professional workflow. For Domain 4, you need to understand how to extract end-use energy breakdowns, peak demand data, and unmet load hours from simulation outputs, and how to present them meaningfully to design teams and clients.
Software Comparison: Capabilities at a Glance
| Tool | Simulation Engine | Primary Use Case | Interface Type | BEMP Exam Relevance |
|---|---|---|---|---|
| EnergyPlus | Heat balance / CFD (native) | Research, compliance, high-detail modeling | Text input (IDF) or GUI via OpenStudio/DesignBuilder | High - foundational algorithm knowledge tested |
| eQUEST | DOE-2.2 | LEED compliance, ASHRAE 90.1 baseline | Wizard-based GUI | High - common in practice, system type knowledge tested |
| OpenStudio | EnergyPlus (via SDK) | Parametric analysis, Measures-based workflows | GUI + Ruby scripting | High - workflow and Measures concepts tested |
| DesignBuilder | EnergyPlus | Design optimization, daylighting, CFD | Full GUI | Moderate - GUI for EnergyPlus, daylighting integration |
| Trace 700 | Proprietary (hourly) | HVAC sizing, commercial energy analysis | GUI | Moderate - mechanical system modeling concepts |
| HAP | Proprietary (hourly) | HVAC design, load calculations | GUI | Moderate - load calculation methodology |
| EnergyPlus Weather (EPW) | N/A (data format) | Weather input for all major tools | File-based | High - TMY vs. AMY selection, climate zone matching |
Domain-Specific Software Depth
What Domain 2 Demands from Your Tool Knowledge
Domain 2's 29% weight makes it the single most important area to prepare, and software knowledge is inseparable from it. The domain covers how building envelope components, HVAC systems, lighting systems, service water heating, and plug loads are modeled. For each system type, you should be able to describe how a simulation tool represents it mathematically, what inputs are required, and what simplifications or assumptions the tool makes.
For example: the BEMP exam might ask how a variable refrigerant flow (VRF) system is modeled in EnergyPlus compared to a split system, or how thermal bridging in a curtain wall assembly can be accounted for in a simulation. These are not questions you can answer from general HVAC knowledge alone-they require understanding the intersection of building science and simulation tool capability.
Domain 4 and the Art of Output Interpretation
Domain 4 (27%) is where many technically strong candidates lose points. The ability to look at a set of simulation outputs and recognize that something is wrong-unusually high lighting energy density, suspiciously low infiltration loads for a leaky building, unmet cooling hours that suggest oversized systems-requires both software literacy and engineering judgment.
Practice reading simulation output reports and asking yourself whether the numbers make physical sense. The BEMP practice test platform includes scenario-based questions that mirror this exact challenge, presenting output data and asking you to diagnose what the model reveals or conceals.
Key Takeaway
For Domain 4, practice interpreting outputs from unfamiliar models, not just models you built yourself. The exam will present outputs and ask you to draw conclusions-your ability to think critically about someone else's model is what separates passing candidates from those who narrowly miss.
Building Your Software Study Plan
Because software knowledge is embedded across all four domains, it does not make sense to study "software" as a standalone topic. Instead, map your software review to each domain's content, and schedule your preparation in phases that reflect each domain's weight and your own experience gaps.
Domain 1 + Tool Selection Fundamentals
- Review the modeling scope framework: what inputs are needed before software selection
- Study the major tool categories: whole-building hourly simulation vs. load calculation tools vs. steady-state methods
- Practice questions from Domain 1 to identify gaps in your tool selection knowledge
Domain 2 Deep Dive (Heaviest Domain)
- Study envelope modeling: heat balance algorithms, conduction transfer functions, thermal bridging
- Review HVAC system types in EnergyPlus and eQUEST: how inputs differ, what assumptions are built in
- Cover lighting control simulation, occupancy scheduling, and plug load modeling
- Use the practice test platform weekly to test component-level knowledge
Domain 3: Application Contexts
- Study ASHRAE 90.1 Appendix G modeling rules and what they require of simulation tools
- Review model calibration methodology for existing buildings
- Cover parametric analysis workflows in OpenStudio Measures
Domain 4: Output Interpretation and Validation
- Practice reading end-use breakdowns and flagging anomalies
- Study unmet load hours, EUI benchmarking, and convergence diagnostics
- Work through scenario-based exam questions that present outputs and ask for conclusions
Full Review and Timed Practice
- Take full-length timed practice exams to simulate exam conditions
- Review any software concepts that appeared in questions you missed
- Revisit Domain 2 and Domain 4 if confidence is below target-these together represent 56% of the exam
Candidates preparing for the BEMP exam who want to accelerate their software knowledge review should focus heavily on published ASHRAE resources, the EnergyPlus Input/Output Reference documentation (conceptually, not exhaustively), and scenario-based practice. Reading about how the BEMP credential is maintained after passing-covered in detail in the article on how to maintain your BEMP credential after passing-can also give you perspective on the ongoing professional development that keeps software knowledge current post-certification.
Because software evolves rapidly in the building energy modeling field, the continuing education requirements for BEMP credential maintenance reflect an expectation that practitioners stay current with tools and methodologies. This is worth knowing as you study: the exam tests you on the state of the field today, and your credential requires you to stay current with it going forward.
Frequently Asked Questions
No. The BEMP exam is a written multiple-choice examination. You are never asked to operate software during the test. Questions test your conceptual understanding of what tools do, how they represent building systems, and how to interpret their outputs-not your ability to navigate a software interface.
EnergyPlus, eQUEST, and OpenStudio are the most consistently relevant tools for BEMP exam preparation. Understanding the DOE-2.2 engine behind eQUEST and the heat balance methodology in EnergyPlus gives you the theoretical foundation most questions require. Commercial tools like Trace 700 and HAP are also referenced, particularly in Domain 2 and Domain 3 contexts involving mechanical system design and compliance modeling.
Domain 4 (Interpretations of Energy Model Results, 27%) is fundamentally about reading and critically evaluating simulation outputs. You need to understand what outputs tools produce-end-use breakdowns, unmet load hours, peak demand data, EUI figures-and how to assess whether those outputs are credible, complete, and correctly interpreted. This requires knowing the tool well enough to recognize when an output is indicating a modeling error versus a legitimate building characteristic.
You do not need to become proficient in every tool, but you should develop conceptual familiarity with the major engines-particularly EnergyPlus and eQUEST-because the exam draws from both. If your professional background is primarily in one tool, supplement your study with documentation and reference materials for the others. Scenario-based practice questions are especially helpful for developing this cross-tool perspective without requiring hands-on use of every platform.
The best preparation combines ASHRAE's own reference materials with practice questions mapped to specific exam domains. The BEMP Exam Prep practice test platform offers questions organized by domain, including scenario-based items that mirror how software knowledge is tested across Domain 2, Domain 3, and Domain 4. Starting with a diagnostic practice session helps you identify which tool-related topics need the most attention before exam day.
Ready to Start Practicing?
Test your software and tool knowledge with domain-mapped practice questions designed specifically for the BEMP exam. Identify your gaps in EnergyPlus, eQUEST, OpenStudio, and output interpretation-then focus your study where it counts most.
Start Free Practice Test