- Which CRES This Cheat Sheet Covers
- The Exam at a Glance
- The 2026 Blueprint: Question Counts by Domain
- Must-Know Facts by Domain
- Passing Score: What Is and Isn't Verified
- Fees, Retests and Scheduling Rules
- Exam-Day Rules and On-Screen References
- After You Pass: Activities and Renewal
- A Domain-Ordered Study Sequence
- Frequently Asked Questions
- The exam is 135 multiple-choice questions in three hours, administered through Kryterion and RETA Network Testing Centers.
- Refrigeration Best Practices is the largest content area at 50 questions; Energy Efficiency Basics has 20 and Domain 4 has 14.
- Passing the exam is not the finish line: three approved energy-efficiency activities are due within one year after passing.
- Application fees are US$550 for RETA members and US$855 for non-members, paid before scheduling.
Which CRES This Cheat Sheet Covers
"CRES" is an acronym shared by several unrelated credentials. This page is about one thing only: the Certified Refrigeration Energy Specialist, governed by the Refrigerating Engineers & Technicians Association (RETA). If you landed here looking for a radiology-equipment, retirement-education or other credential with the same letters, none of the facts below apply to it. For a plain-language orientation to the credential itself, see What Is CRES? or What Does CRES Stand For?.
Everything here is anchored to the 2026 CRES Exam Information Handbook, Revision 06, reviewed and approved January 2, 2026 and valid for examinations from January 1 through December 31, 2026. Where the handbook is silent or ambiguous, this cheat sheet says so rather than guessing.
The Exam at a Glance
| Item | What the 2026 Handbook Says |
|---|---|
| Governing body | Refrigerating Engineers & Technicians Association (RETA) |
| Format | 135 multiple-choice questions, English language |
| Time limit | Three hours |
| Question styles | Individual questions plus scenarios using generic refrigeration operating screens |
| Delivery | Kryterion Testing Network (KTN) and RETA Network Testing Centers |
| Scoring standard | Scaled score of 70 or higher (see caveat below) |
| Calculator | Simple nonprinting calculator, memory cleared in front of the proctor |
| Personal study guides | Prohibited; selected electronic references supplied on screen |
The scenario questions are the distinctive feature. Instead of asking you to recite a definition, the exam presents a generic refrigeration operating screen and asks what the readings imply. That favors candidates who have actually looked at suction pressures, discharge temperatures, compressor loading and defrost status in a live plant. For a frank look at how that format affects difficulty, read How Hard Is the CRES Exam?
The 2026 Blueprint: Question Counts by Domain
The issuer publishes question counts, not percentage weights. The numbers below are the official allocations for Domains 1 through 5, and they sum to the 135 questions on the exam.
| Domain | Content Area | Questions |
|---|---|---|
| 1 | Refrigeration system concepts, components, and functions in safe operations, including performance, measurement, PSM and RM | 29 |
| 2 | Energy Efficiency Basics: concepts, calculations, conversions, efficiency opportunities, measuring and tracking energy use, energy mapping | 20 |
| 3 | Refrigeration Best Practices: instrumentation, calibration, controls, design and sizing characteristics, defrost cycles, refrigeration loads | 50 |
| 4 | Managing non-refrigeration system energy use such as lighting, compressed air and pumps | 14 |
| 5 | Facility Energy Management: set and monitor key performance indicators, measurement to improve energy efficiency, creating incentives and opportunities to improve energy efficiency | 22 |
Must-Know Facts by Domain
Domain 1: System Concepts, Components and Safe Operations (29 questions)
This is the foundation: how a refrigeration system works and how it is operated safely.
- Major components and what each does in the cycle, and how performance is measured
- Reading a system's condition from operating measurements
- Process Safety Management (PSM) and Risk Management (RM) as they relate to safe operation
- Ammonia safety awareness; the study guide includes an Ammonia Safety Data Sheet (SDS) as a reference section
Domain 2: Energy Efficiency Basics (20 questions)
The quantitative core of the credential. Expect calculations and unit conversions.
- Core efficiency concepts and how to calculate energy use and savings
- Unit conversions, which the study guide supports with a Formulas section and a CRES References Sheet
- Measuring and tracking energy use over time
- Energy mapping: understanding where a facility's energy actually goes
Domain 3: Refrigeration Best Practices (50 questions)
The heaviest domain and the one most tied to hands-on plant judgment.
- Instrumentation and calibration: why a drifting sensor quietly wastes energy
- Controls strategies and how they interact with load
- Design and sizing characteristics that affect efficiency
- Defrost cycles: when, how long and how they affect energy use
- Refrigeration loads and how they vary
Domain 4: Non-Refrigeration System Energy Use (14 questions)
The smallest domain, but easy to neglect because it sits outside the compressor room.
- Lighting, compressed air and pumps as energy consumers in a refrigerated facility
- Recognizing efficiency opportunities in systems that are not refrigeration equipment
Domain 5: Facility Energy Management (22 questions)
The management layer that turns one-time fixes into sustained savings.
- Setting and monitoring key performance indicators (KPIs)
- Using measurement to drive improvement
- Creating incentives and opportunities to improve energy efficiency across a facility
Passing Score: What Is and Isn't Verified
The handbook's examination specifications require a scaled score of 70 or higher. The requirements section, however, describes the standard as 70%. Those are not the same statement. A scaled score is a transformation of raw performance, so you should not assume that 70 scaled equals 70 percent of 135 questions answered correctly, and this cheat sheet does not claim a raw-question cutoff because none is verified.
The practical takeaway: aim for comfortable mastery rather than a minimum, particularly in Domain 3. For a deeper treatment of the wording issue, see CRES Passing Score: Exactly What You Need to Pass. Published pass-rate data is also limited, so approach any claimed figure with caution; our CRES pass rate analysis explains what can and cannot be said.
Fees, Retests and Scheduling Rules
| Item | Member | Non-Member |
|---|---|---|
| Initial application fee | US$550 | US$855 |
| First discounted retest (within one year of initial test) | US$370 | US$575 |
| Third attempt | Full fee | |
| Rescheduling inside the 96-hour deadline | US$150 | |
Sequence matters
Application approval and payment come before scheduling. You arrange the exam through RETA staff, not directly with a testing center. Skipping that order is a common source of delay.
Retest and expiration rules
- Wait at least two weeks between attempts.
- An approved retest must be scheduled and completed within 90 days of approval and payment.
- Applications expire one year after payment; a 90-day extension may be requested before expiration.
Exam-Day Rules and On-Screen References
- Bring your candidate authorization code and two forms of identification, including government-issued photo ID.
- A simple nonprinting calculator is allowed, but its memory must be cleared in front of the proctor.
- Personal study guides are prohibited. Selected electronic references are supplied on screen.
Know the reference set before you sit
RETA's January 2023 CRES Examination Study Guide (Revision 4) is the supplemental preparation source. It provides sample questions and references, not a full official practice examination. Its eleven headings are unweighted preparation sections, not exam domains:
- Introduction to the CRES Study Guide
- Using RETA References on Screen
- Calculations and Refrigeration System Screens
- Sample System Screen
- Formulas
- CRES References Sheet
- Ammonia Safety Data Sheet (SDS)
- CRES Screens 1 to 24
- Ammonia Saturated Properties Table
- Halocarbon Refrigerant Properties Table
- Lighting
After You Pass: Activities and Renewal
Earning the credential takes two things: passing the written exam and approval of three documented energy-efficiency activities.
Initial certification activities
- Three documented energy-efficiency activities, at least two producing direct savings
- Submitted through the RETA Certification Database within one year after passing
- Low- or no-cost operational improvements can qualify; capital projects are not required
- The three-hour exam timer does not apply to these activities
Key Takeaway
Start identifying candidate energy-efficiency activities before exam day. A documented operational improvement you have already completed, such as a calibration correction or defrost adjustment, may position you to submit quickly after passing. The 2026 handbook sets the requirement at three activities; an older generic RETA FAQ was reported to say five, but it was not re-retrieved and the handbook controls.
Prerequisites
The published CRES requirements do not list another RETA credential as a prerequisite. Safe refrigeration-operation knowledge, the application and the Code of Conduct requirements apply. See CRES Requirements: Eligibility, Prerequisites & How to Qualify for the full picture.
Renewal every three years
- Two additional approved energy-efficiency activities, at least one producing direct savings
- 24 professional development hours (PDHs) earned during the active cycle, including at least 12 in refrigeration operations and six in energy efficiency
- An online renewal application and a renewal fee
The current numerical renewal fee was not reverified for this article, so check RETA directly for it. Also note that an older renewal form valid only for 2023 should not be used as current authority; rely on the 2026 handbook requirements above.
A Domain-Ordered Study Sequence
Because Domain 3 carries 50 questions and Domain 1 supplies the vocabulary everything else depends on, sequence matters more than hours logged. Here is one way to order a six-week plan around the blueprint.
Domain 1 foundations
- Review components, cycle behavior and performance measurement
- Read the Ammonia SDS section and PSM/RM concepts
Domain 3: the 50-question block
- Instrumentation, calibration, controls, sizing, defrost and load behavior
- Work through the Sample System Screen and early CRES Screens
Domain 2 calculations
- Drill formulas and conversions using the Formulas and CRES References Sheet sections
- Practice with the property tables
Domains 4 and 5
- Lighting, compressed air and pumps, with Lighting studied from memory since it is not on screen
- KPIs, measurement and incentive concepts
Integration
- Run through all 24 CRES Screens under a three-hour mindset
- Take timed practice tests and revisit weak domains
Adjust the order to your background. A technician who lives in the engine room daily may compress Week 1 and spend longer on Domains 2 and 5; an energy manager from the office side may need the reverse.
Frequently Asked Questions
The written exam has 135 English-language multiple-choice questions to complete in three hours, including individual questions and scenarios built on generic refrigeration operating screens.
Domain 3, Refrigeration Best Practices, with 50 questions. The other allocations are 29 for Domain 1, 20 for Domain 2, 14 for Domain 4 and 22 for Domain 5. The issuer provides counts rather than percentage weights.
The application fee is US$550 for RETA members and US$855 for non-members. A first discounted retest within one year costs US$370 and US$575 respectively. A third attempt requires the full fee. The cost breakdown covers the details, and whether the investment pays off is examined in Is the CRES Certification Worth It?
Yes. After passing, you must have three documented energy-efficiency activities approved, at least two producing direct savings, submitted through the RETA Certification Database within one year. Low- or no-cost operational improvements can qualify.
No. Personal study guides are prohibited. You may use a simple nonprinting calculator after clearing its memory in front of the proctor, and selected electronic references are provided on screen. To rehearse under realistic conditions, try the CRES practice tests.
Keep this sheet beside your study plan, confirm any deadline-sensitive detail directly with RETA, and use the linked guides to go deeper where your own gaps are widest.