ASHRAE Building Energy Assessment Professional (BEAP) Overview
These study notes are designed to prepare candidates for the ASHRAE Building Energy Assessment Professional (BEAP) certification exam. The BEAP credential validates expertise in conducting comprehensive energy assessments of commercial and industrial buildings, including data collection, analysis, and recommendation of energy efficiency measures. The notes cover six core subjects: Energy Auditing Methodology and Standards, Building Envelope and Thermal Performance, HVAC and Mechanical System Optimization, Lighting and Electrical Power Systems, Energy Data Analysis and Modeling, and Economic Analysis and Measurement & Verification. Each subject includes key concepts, must-know items, clinical applications, high-yield distinctions, common pitfalls, and review tasks. Candidates should supplement these notes with official ASHRAE resources and current codes.
For Technical Conquer practice planning, this module is tracked as 100 questions over about 180 minutes with a listed pass mark of 70%. Treat those numbers as practice baselines and verify the current official format before scheduling.
How This Guide Is Organized
The sections below turn the syllabus into studyable subject blocks. Read a subject first, explain the must-know ideas without notes, then use questions, flashcards, and mind maps to test whether the knowledge holds under field-style pressure.
- Energy Auditing Methodology and Standards
- Building Envelope and Thermal Performance
- HVAC and Mechanical System Optimization
- Lighting and Electrical Power Systems
- Energy Data Analysis and Modeling
- Economic Analysis and Measurement & Verification
Exam Snapshot and Readiness Target
Format: 100 questions, 180 minutes, pass mark 70% (practice baseline; verify with ASHRAE)
Candidate level: Professional engineer or experienced energy auditor with at least 5 years of relevant experience
Readiness target: Demonstrate ability to lead energy assessments, analyze building systems, and recommend cost-effective energy conservation measures
Most candidates should budget at least 42+ focused study hours, then adjust upward for unfamiliar equipment, code, regulatory, commissioning, controls, or calculation-heavy content.
Energy Auditing Methodology and Standards
Syllabus Focus
- ASHRAE Standard 211 (Standard for Commercial Building Energy Audits)
- ASHRAE Standard 100 (Energy Efficiency in Existing Buildings)
- Audit levels (Preliminary, Level 1, Level 2, Level 3)
- Data collection and site visit procedures
- Benchmarking using Portfolio Manager
Key Notes
- ASHRAE Standard 211 defines three levels of energy audits: Level 1 (walk-through), Level 2 (energy survey and analysis), Level 3 (detailed analysis of capital-intensive modifications).
- Level 1 audit includes a walk-through, utility bill analysis, and identification of low-cost/no-cost measures. Level 2 adds a detailed energy balance and financial analysis. Level 3 involves sub-metering and simulation.
- Benchmarking using ENERGY STAR Portfolio Manager is a prerequisite for many audits; compare EUI to national medians.
- Standard 100 provides requirements for energy efficiency in existing buildings, including an energy management plan.
- Data collection must include utility bills (12-36 months), building plans, equipment schedules, occupancy patterns, and weather data.
- Site visit should verify equipment nameplate data, operating conditions, and control sequences.
Must Know
- ASHRAE Standard 211 audit levels and their deliverables
- How to calculate Energy Use Intensity (EUI) and compare to benchmarks
- Components of an energy audit report: executive summary, energy balance, ECM list, financial analysis
- Common data sources: utility bills, sub-meters, BMS trends, equipment schedules
Field and Exam Application
- Conduct a Level 2 audit for a 50,000 sq ft office building: collect 24 months of utility data, perform a walk-through, identify HVAC and lighting ECMs, and calculate simple payback.
- Use Portfolio Manager to benchmark a hospital and identify that its EUI is 30% above the national median, triggering a Level 2 audit.
- During a site visit, verify that the chiller plant operates at 0.8 kW/ton and compare to design conditions.
High-Yield Distinctions
- Level 1 vs Level 2: Level 1 identifies obvious opportunities; Level 2 requires energy balance and financial analysis.
- ASHRAE Standard 211 vs 100: 211 is audit methodology; 100 is performance requirements for existing buildings.
- EUI vs site EUI vs source EUI: site EUI is energy consumed at the building; source EUI includes generation and transmission losses.
Common Pitfalls
- Confusing audit levels: Level 2 does not require sub-metering or simulation (that's Level 3).
- Omitting weather normalization when analyzing utility bills.
- Failing to verify equipment nameplate data during site visit; relying solely on as-built drawings.
Review Tasks
- Review ASHRAE Standard 211-2018 summary and compare audit level requirements.
- Practice calculating EUI from utility bills and floor area.
- Create a checklist for a Level 2 site visit.
Building Envelope and Thermal Performance
Syllabus Focus
- Heat transfer mechanisms (conduction, convection, radiation)
- U-values, R-values, and thermal bridging
- Air leakage and infiltration
- Window and glazing performance (SHGC, U-factor)
- Insulation types and installation
Key Notes
- Heat transfer through the envelope is driven by temperature difference and is quantified by U-value (overall heat transfer coefficient). Lower U-value means better insulation.
- R-value is thermal resistance; R = 1/U. Total R-value includes air films and insulation layers.
- Thermal bridging occurs when highly conductive materials (e.g., steel studs) bypass insulation, reducing effective R-value.
- Air leakage is a major source of energy loss; measured by blower door test (CFM50 or ACH50).
- Window performance: U-factor (heat loss), Solar Heat Gain Coefficient (SHGC) (solar heat gain), and Visible Transmittance (VT).
- Infiltration rate depends on building tightness, wind, and stack effect. Typical commercial buildings have 0.5-1.0 ACH at 50 Pa.
Must Know
- Calculate overall U-value for a wall assembly given layer R-values.
- Impact of thermal bridging on effective R-value (e.g., steel studs reduce R-value by 15-30%).
- ASHRAE Standard 90.1 envelope requirements for different climate zones.
- Common insulation materials: fiberglass, foam board, spray foam, cellulose; their R-values per inch.
Field and Exam Application
- Evaluate a roof replacement: compare R-30 vs R-40 insulation and calculate energy savings using degree-day method.
- Inspect a building for air leaks using infrared thermography and identify gaps around windows and doors.
- Recommend window replacement: select low-e glazing with U=0.3 and SHGC=0.4 for a cooling-dominated climate.
High-Yield Distinctions
- R-value vs U-value: R-value is resistance; U-value is conductance. Higher R is better; lower U is better.
- SHGC vs VT: SHGC measures solar heat gain; VT measures visible light transmission. Low SHGC reduces cooling load; high VT reduces lighting load.
- Air barrier vs vapor barrier: air barrier stops air leakage; vapor barrier controls moisture diffusion. Both are needed but serve different purposes.
Common Pitfalls
- Assuming insulation R-value is the only factor; ignoring thermal bridging and air leakage.
- Using R-value per inch without considering total thickness or compression.
- Confusing U-factor with R-value in window specifications.
Review Tasks
- Calculate the overall U-value for a wall with brick, 2x4 studs with R-13 fiberglass, and drywall. Include air films.
- Research ASHRAE 90.1-2019 envelope requirements for your climate zone.
- Review a blower door test report and interpret ACH50.
HVAC and Mechanical System Optimization
Syllabus Focus
- HVAC system types (VAV, CAV, heat pump, chiller, boiler)
- Efficiency metrics (EER, SEER, COP, IPLV, kW/ton)
- Economizer operation and free cooling
- Demand-controlled ventilation (DCV)
- Variable frequency drives (VFDs) and pump/fan affinity laws
Key Notes
- VAV systems vary airflow to maintain temperature, saving fan energy at part load. CAV systems deliver constant airflow, less efficient.
- Chiller efficiency: kW/ton (lower is better). Typical centrifugal chillers: 0.5-0.7 kW/ton at full load; IPLV accounts for part load.
- Economizer cycles use outside air for free cooling when conditions are favorable (enthalpy or dry-bulb control).
- DCV adjusts outdoor air intake based on CO2 levels or occupancy, reducing conditioning load.
- Fan affinity laws: airflow ∝ speed, pressure ∝ speed², power ∝ speed³. Reducing speed by 20% reduces power by 49%.
- Boiler efficiency: combustion efficiency (stack loss) vs thermal efficiency (heat transfer). Condensing boilers achieve >90% efficiency.
Must Know
- Calculate fan energy savings from VFD installation using affinity laws.
- Determine if an economizer is operating correctly: check outdoor air damper, sensors, and control sequence.
- Interpret chiller part-load performance curves and IPLV.
- Understand the difference between EER, SEER, COP, and when to use each.
Field and Exam Application
- Audit a VAV system: measure supply air temperature, static pressure, and VFD speed. Identify opportunities to reset static pressure setpoint.
- Evaluate a chiller plant: measure kW/ton at current load and compare to design. Recommend chiller staging or replacement.
- Check economizer operation: on a mild day, verify that outdoor air dampers are open and compressors are off.
High-Yield Distinctions
- EER vs SEER: EER is at full load; SEER is seasonal average. For commercial, EER and IPLV are more common.
- kW/ton vs COP: kW/ton = 12 / COP. COP = 3.5 corresponds to 3.43 kW/ton.
- VAV vs CAV: VAV saves fan energy; CAV is simpler but less efficient. VAV requires proper minimum airflow to avoid poor IAQ.
Common Pitfalls
- Assuming all VFDs save energy; they only save if the load varies and the VFD is properly controlled.
- Ignoring pump affinity laws: reducing pump speed reduces power by cube of speed ratio, but system curve must be considered.
- Overlooking economizer maintenance: stuck dampers or faulty sensors can waste energy.
Review Tasks
- Calculate the power savings if a fan speed is reduced from 100% to 80% using affinity laws.
- Review a chiller plant control sequence and identify opportunities for optimization.
- Study ASHRAE Standard 90.1 requirements for economizers in your climate zone.
Lighting and Electrical Power Systems
Syllabus Focus
- Lighting types (LED, fluorescent, HID, incandescent)
- Lighting power density (LPD) and ASHRAE 90.1 requirements
- Lighting controls (occupancy sensors, daylight harvesting, dimming)
- Power factor and harmonics
- Transformers and distribution losses
Key Notes
- LED lighting is most efficient: 100-150 lumens per watt vs fluorescent (60-100) and incandescent (10-17).
- LPD is watts per square foot; ASHRAE 90.1 sets maximum LPD for different space types (e.g., office: 0.9 W/ft² for LED).
- Occupancy sensors reduce energy by turning lights off when space is unoccupied; typical savings 20-30%.
- Daylight harvesting dims lights based on available daylight; requires photosensors and dimmable ballasts/drivers.
- Power factor: ratio of real power to apparent power. Low PF (e.g., 0.7) causes utility penalties. Correct with capacitors.
- Harmonics: non-linear loads (e.g., LED drivers, VFDs) create harmonic distortion, which can overheat transformers and neutral conductors.
Must Know
- Calculate LPD for a space and compare to ASHRAE 90.1 allowance.
- Identify energy-saving opportunities: retrofit T8 fluorescent to LED, install occupancy sensors, implement daylight harvesting.
- Understand power factor correction: capacitors improve PF, reducing demand charges.
- Recognize harmonic issues: high neutral current, transformer overheating, distorted voltage waveform.
Field and Exam Application
- Audit an office lighting system: measure current LPD (1.2 W/ft²) and propose LED retrofit to achieve 0.8 W/ft², saving 33%.
- Evaluate a parking lot lighting: replace 400W metal halide with 150W LED, reducing energy by 62% and improving uniformity.
- Check power factor at a facility: measure 0.75 PF, recommend capacitor bank to correct to 0.95, reducing demand charges.
High-Yield Distinctions
- LPD vs lighting power allowance: LPD is actual installed; allowance is maximum permitted by code.
- Occupancy sensor vs vacancy sensor: occupancy turns lights on automatically; vacancy requires manual on, auto off. Vacancy saves more energy.
- Power factor vs displacement power factor vs true power factor: displacement PF is for linear loads; true PF includes harmonics.
Common Pitfalls
- Assuming all LED retrofits are cost-effective; consider fixture replacement vs lamp retrofit, and compatibility with controls.
- Ignoring harmonic distortion when adding VFDs or LED drivers; may require harmonic filters.
- Overlooking lighting controls: simply replacing lamps misses savings from controls.
Review Tasks
- Calculate LPD for a 10,000 sq ft office with 200 fixtures at 32W each (including ballast).
- Research ASHRAE 90.1-2019 LPD allowances for a retail store.
- Review a utility bill for power factor penalty and calculate savings from correction.
Energy Data Analysis and Modeling
Syllabus Focus
- Utility bill analysis and weather normalization
- Energy balance and end-use breakdown
- Building energy simulation (eQUEST, EnergyPlus, OpenStudio)
- Calibration of models to utility data
- Regression analysis and degree-day methods
Key Notes
- Utility bill analysis: collect 12-36 months of data, plot consumption vs weather, identify baseline and anomalies.
- Weather normalization: adjust consumption to typical weather using degree-days (HDD/CDD) to compare year-to-year.
- Energy balance: sum of all end uses (HVAC, lighting, plug loads, etc.) should equal total consumption within 10%.
- Building energy simulation: use software to model energy use and evaluate ECMs. Calibrate to within 5-10% of actual bills.
- Degree-day method: estimate heating/cooling energy using HDD/CDD and building load coefficient (UA).
- Regression analysis: correlate energy use to weather, occupancy, or production. Simple linear regression: Energy = a + b*CDD.
Must Know
- Perform weather normalization using degree-days: calculate normalized consumption = actual consumption * (typical degree-days / actual degree-days).
- Develop an energy balance: estimate HVAC, lighting, plug loads, and other end uses from equipment data and schedules.
- Calibrate a simulation model: adjust inputs (e.g., infiltration, equipment efficiency) until monthly consumption matches utility bills within 5%.
- Use regression to identify base load (weather-independent) and variable load (weather-dependent).
Field and Exam Application
- Analyze utility bills for a school: plot monthly kWh vs CDD, find base load of 50,000 kWh/month (lighting, plug loads) and cooling slope of 500 kWh/CDD.
- Create an energy balance for a small office: total 200,000 kWh/yr; HVAC 40%, lighting 25%, plug loads 20%, other 15%.
- Calibrate an eQUEST model for a retail store: adjust lighting schedule and cooling setpoint until simulated monthly bills match actual within 3%.
High-Yield Distinctions
- Weather normalization vs weather correction: normalization adjusts to typical weather; correction adjusts for actual weather differences.
- Degree-day method vs bin method: degree-day is simpler, assumes linear relationship; bin method accounts for temperature distribution.
- Simulation calibration: manual vs automated (e.g., using optimization algorithms). Manual is common but time-consuming.
Common Pitfalls
- Using only one year of utility data; need multiple years to capture variability.
- Ignoring non-weather factors like occupancy changes or equipment additions.
- Overfitting a simulation model: adjusting too many parameters to match bills, reducing predictive accuracy.
Review Tasks
- Collect 12 months of utility bills for a building and plot consumption vs average monthly temperature.
- Perform a simple degree-day analysis to estimate heating energy for a home.
- Review a calibrated simulation report and note the calibration criteria (e.g., NMBE, CVRMSE).
Economic Analysis and Measurement & Verification
Syllabus Focus
- Simple payback, net present value (NPV), internal rate of return (IRR)
- Life-cycle cost analysis (LCCA)
- Inflation, discount rate, and escalation
- Measurement and Verification (M&V) options per IPMVP
- Savings calculation and baseline adjustment
Key Notes
- Simple payback = initial cost / annual savings. Does not account for time value of money.
- NPV = sum of discounted cash flows minus initial cost. Positive NPV indicates cost-effective investment.
- IRR is the discount rate that makes NPV zero. Compare to cost of capital or hurdle rate.
- LCCA considers all costs over the life of the project: initial, operating, maintenance, replacement, and disposal.
- IPMVP (International Performance Measurement and Verification Protocol) defines four M&V options: A (retrofit isolation with key parameter measurement), B (retrofit isolation with all parameter measurement), C (whole facility), D (calibrated simulation).
- Savings = baseline energy - post-retrofit energy ± adjustments (weather, occupancy, etc.). Baseline must be adjusted for changes in conditions.
Must Know
- Calculate simple payback and NPV for a lighting retrofit: cost $50,000, annual savings $15,000, discount rate 8%, life 10 years.
- Select appropriate M&V option based on project type and risk: Option C for whole-building savings, Option A for simple measures like lighting.
- Understand baseline adjustment: if occupancy increases after retrofit, baseline must be adjusted upward to avoid overstating savings.
- Apply escalation rates for energy costs in LCCA (e.g., 3% per year for electricity).
Field and Exam Application
- Evaluate a chiller replacement: initial cost $200,000, annual savings $40,000, life 15 years, discount rate 10%. Calculate NPV and IRR.
- Develop an M&V plan for a lighting retrofit using IPMVP Option A: measure lighting power before and after, assume hours of operation from schedule.
- Adjust baseline for a building that added a new wing: increase baseline energy by proportional floor area.
High-Yield Distinctions
- Simple payback vs NPV: payback ignores time value; NPV accounts for it. Use NPV for long-term projects.
- IPMVP Option A vs B: Option A measures one parameter (e.g., power) and estimates others (e.g., hours); Option B measures all parameters.
- Discount rate vs inflation: discount rate reflects opportunity cost; inflation is general price increase. Use real discount rate = nominal - inflation.
Common Pitfalls
- Using simple payback as sole criterion; may reject projects with long payback but high NPV.
- Ignoring maintenance costs in LCCA; e.g., LED lamps have longer life but may require driver replacement.
- Failing to adjust baseline for changes in weather, occupancy, or production; leads to inaccurate savings.
Review Tasks
- Calculate NPV for a project with initial cost $100,000, annual savings $20,000 for 10 years, discount rate 8%.
- Review an IPMVP Option C plan and identify how baseline is adjusted for weather.
- Practice LCCA for two HVAC system alternatives: compare initial cost, energy cost, maintenance, and replacement over 20 years.
How To Use These Notes With Practice Questions
Do not jump straight from reading to a full mock. Work by subject first: review the key notes, make a short recall sheet from memory, then answer a focused question set. After each miss, decide whether the problem was missing theory, weak code/source recall, poor measurement setup, calculation error, or a field sequence you did not visualize.
Technical Conquer's question bank, flashcards, mind maps, and spaced review tools are most useful after this instruction layer because they reveal which parts of the notes are not yet retrievable.
Final Review Checklist
- Review ASHRAE Standard 211 audit levels and deliverables.
- Practice calculating U-values, LPD, and simple payback.
- Understand chiller and boiler efficiency metrics and part-load performance.
- Be able to perform weather normalization and energy balance.
- Know IPMVP M&V options and when to apply each.
- Review ASHRAE 90.1 envelope and lighting requirements for your climate zone.
- Familiarize yourself with energy simulation calibration criteria (NMBE, CVRMSE).
- Study economic analysis methods: NPV, IRR, LCCA.
- Check official ASHRAE candidate resources for any updates to exam content.
Official Sources and Further Reading
Use these sources as the final authority for format, eligibility, rules, regulatory limits, and exam updates. Study notes are a preparation layer, not a replacement for official candidate guidance.