REFCOM Elite Certification (REFCOM) Overview
These study notes are designed to prepare candidates for the REFCOM Elite Certification exam, which validates advanced knowledge of F-Gas regulations, refrigerant containment, recovery procedures, installation standards, record keeping, and alternative refrigerants. The notes are based on official sources including UK government F-gas guidance, REFCOM, City & Guilds, ASHRAE, IMC, IECC, ACCA, and BESA Academy. Candidates should verify specific pass marks, eligibility, and administrative details with REFCOM directly.
For Technical Conquer practice planning, this module is tracked as 80 questions over about 120 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.
- F-Gas Regulation and Statutory Compliance
- Refrigerant Containment and Leak Detection Protocols
- Recovery, Recycling, and Reclamation Procedures
- Installation, Commissioning, and Maintenance Standards
- Record Keeping and Logbook Management
- Alternative Refrigerants and Flammability Safety
Exam Snapshot and Readiness Target
Format: 80 questions, 120 minutes, pass mark 70% (practice baseline; verify with REFCOM)
Candidate level: Technician-level for service credentials; suitable for experienced HVAC/R professionals seeking F-Gas certification
Readiness target: Demonstrate comprehensive understanding of F-Gas regulations, safe handling of refrigerants, leak detection, recovery procedures, installation standards, logbook management, and alternative refrigerants including flammability safety.
Most candidates should budget at least 36+ focused study hours, then adjust upward for unfamiliar equipment, code, regulatory, commissioning, controls, or calculation-heavy content.
F-Gas Regulation and Statutory Compliance
Syllabus Focus
- EU F-Gas Regulation (517/2014) and UK implementation
- Phase-down schedules and quota system
- Certification requirements for personnel and companies
- Prohibitions on use of certain refrigerants
- Reporting and labelling obligations
Key Notes
- The F-Gas Regulation aims to reduce emissions of fluorinated greenhouse gases by 79% by 2030 compared to 1990 levels.
- Personnel handling F-gases must hold a valid certificate (e.g., City & Guilds 2079 or equivalent) and be registered with a mandatory scheme like REFCOM.
- Companies must hold a company certificate to purchase and handle F-gases; REFCOM Elite certification is the highest level for companies.
- Phase-down reduces the quantity of HFCs placed on the market via a quota system; quotas are allocated based on historical data and are tradable.
- Prohibitions include use of certain HFCs in specific applications (e.g., R-404A in new commercial refrigeration from 2020) and pre-charged equipment without proper labelling.
- Leak checks are mandatory based on CO2 equivalent charge size: at least every 12 months for 5-50 tonnes CO2 eq, every 6 months for 50-500 tonnes, and every 3 months for >500 tonnes, with leak detection systems for >500 tonnes.
- Records of refrigerant usage, leak checks, and servicing must be kept for at least 5 years and made available to enforcement authorities.
Must Know
- Know the CO2 equivalent thresholds for leak check frequency and mandatory leak detection systems.
- Understand the phase-down schedule: 2024 target 40% of baseline, 2030 target 21%.
- Be able to identify which refrigerants are banned or phased out for specific applications (e.g., R-404A, R-507A).
- Know the certification categories: Category I (full service), II (recovery only), III (recovery of small quantities), IV (leak checking).
Field and Exam Application
- When servicing a supermarket rack system with 200 kg of R-404A (CO2 eq ~3920 tonnes), leak checks must be every 3 months and a fixed leak detection system is required.
- For a small split AC with 3 kg of R-410A (CO2 eq ~6.3 tonnes), leak checks are required every 12 months if the system is hermetically sealed and labelled.
- When purchasing R-32 for a new installation, verify that the company has sufficient quota allocation or has purchased quota from another company.
High-Yield Distinctions
- CO2 equivalent = mass of refrigerant (kg) × GWP. For example, R-404A GWP=3922, so 1 kg = 3.922 tonnes CO2 eq.
- Leak detection systems must be tested annually and records kept.
- Pre-charged equipment must be labelled with the refrigerant type, quantity, and GWP.
- The UK has implemented the F-Gas Regulation via the Fluorinated Greenhouse Gases Regulations 2015 (as amended).
Common Pitfalls
- Confusing CO2 equivalent thresholds with mass thresholds: leak check frequency is based on CO2 eq, not mass.
- Assuming all HFCs are banned: only specific uses are prohibited; many HFCs are still allowed under quota.
- Forgetting that company certification is separate from personnel certification; both are required.
- Overlooking the requirement for leak detection systems on systems >500 tonnes CO2 eq, not just large mass systems.
Review Tasks
- Calculate CO2 equivalent for common refrigerants (R-134a, R-410A, R-404A, R-32) given their GWP.
- List the leak check frequencies for systems with 10 tonnes, 100 tonnes, and 600 tonnes CO2 eq.
- Identify three applications where HFCs are prohibited under the F-Gas Regulation.
- Describe the steps to verify a company's quota allocation before purchasing HFCs.
Refrigerant Containment and Leak Detection Protocols
Syllabus Focus
- Leak detection methods (electronic, ultrasonic, dye, soap bubble)
- Fixed leak detection systems and their maintenance
- Leak testing procedures (pressure test, vacuum test, direct and indirect methods)
- Minimising refrigerant loss during servicing
- Reporting and repairing leaks
Key Notes
- Electronic leak detectors are the most common; they must be calibrated regularly and used according to manufacturer instructions.
- Ultrasonic detectors are useful for detecting leaks in noisy environments but require line-of-sight.
- Dye injection is a last resort as it can contaminate the system; only use approved dyes.
- Soap bubble testing is simple but less sensitive; suitable for accessible joints.
- Fixed leak detection systems (e.g., continuous monitoring) are mandatory for systems >500 tonnes CO2 eq; they must be tested annually.
- Leak testing after repair must be done to ensure the repair is effective; typically a pressure test with nitrogen or a vacuum hold test.
- Refrigerant should be recovered before opening the system; use recovery machines and cylinders rated for the refrigerant type.
Must Know
- Know the sensitivity of different leak detection methods: electronic detectors can detect <5 g/year, soap bubbles ~100 g/year.
- Understand the procedure for pressure testing with nitrogen: never use oxygen or flammable gases; use a pressure regulator and relief valve.
- Know that vacuum testing involves pulling a deep vacuum (e.g., 500 microns) and holding for a specified time.
- Be able to select the appropriate leak detection method based on system type, refrigerant, and accessibility.
Field and Exam Application
- For a chiller with R-134a and a suspected leak, use an electronic leak detector calibrated for R-134a, checking all joints and service valves.
- After replacing a compressor on a supermarket rack, perform a pressure test with nitrogen to 150 psig and hold for 30 minutes, then evacuate to 500 microns.
- For a system with a fixed leak detection system, test the system annually by releasing a test gas or using a simulated alarm.
High-Yield Distinctions
- Electronic leak detectors are sensitive to specific refrigerants; some are universal, others are refrigerant-specific.
- Ultrasonic detectors detect the sound of gas escaping; they are not affected by wind or contaminants.
- Dye leaks can cause false alarms and may require system flushing; use only when other methods fail.
- Fixed leak detection systems must be capable of detecting a leak of 5% of the annual refrigerant charge or less.
Common Pitfalls
- Using a leak detector not calibrated for the refrigerant in use (e.g., using an R-22 detector on R-410A).
- Over-pressurising the system during pressure testing; always use a regulator and stay within design pressure.
- Assuming a vacuum hold test is sufficient without considering temperature changes and moisture.
- Failing to record leak test results in the logbook.
Review Tasks
- List the steps for a pressure test with nitrogen on a medium-temperature refrigeration system.
- Compare the advantages and disadvantages of electronic vs. ultrasonic leak detectors.
- Describe the procedure for testing a fixed leak detection system.
- Explain why dye injection is a last resort and what precautions to take.
Recovery, Recycling, and Reclamation Procedures
Syllabus Focus
- Recovery equipment and techniques
- Refrigerant recycling vs. reclamation
- Handling of recovered refrigerants
- Disposal of refrigerants and cylinders
- Safety procedures during recovery
Key Notes
- Recovery is the removal of refrigerant from a system for storage, recycling, or disposal; it must be done using certified recovery equipment.
- Recycling involves cleaning refrigerant for reuse on-site (e.g., oil separation, moisture removal); it does not restore refrigerant to original purity.
- Reclamation is the reprocessing of refrigerant to AHRI 700 standard; it must be done by a certified reclaimer.
- Recovered refrigerant must be stored in approved cylinders, properly labelled with refrigerant type, quantity, and date.
- Cylinders must not be overfilled; maximum fill is 80% of volume for liquid, and they must be stored upright in a well-ventilated area.
- Safety: wear PPE (gloves, goggles), avoid contact with liquid refrigerant (frostbite), and ensure good ventilation to prevent asphyxiation.
- Disposal of refrigerants must comply with environmental regulations; they cannot be vented to atmosphere.
Must Know
- Know the difference between recovery, recycling, and reclamation, and when each is appropriate.
- Understand the requirements for recovery cylinders: colour coding, pressure rating, and labelling.
- Be able to calculate the maximum fill weight for a recovery cylinder given its water capacity and refrigerant density.
- Know that recovery equipment must be certified to EN 378 or equivalent and maintained regularly.
Field and Exam Application
- When decommissioning a chiller with R-134a, connect a recovery machine to the liquid line, recover liquid first, then vapour, until the system reaches 0 psig.
- For a small split AC with R-410A, use a recovery machine rated for high-pressure refrigerants; recover both liquid and vapour.
- If a cylinder of recovered R-404A is to be sent for reclamation, ensure it is labelled with the refrigerant type, weight, and date, and that the cylinder is within its test date.
High-Yield Distinctions
- Recovery efficiency: for systems with <20 kg charge, recovery must achieve 90% of the charge; for >20 kg, 95%.
- Recycling does not remove all contaminants; reclaimed refrigerant meets AHRI 700 purity standards.
- Cylinder colour codes: R-134a (light blue), R-410A (rose), R-404A (orange), R-32 (light blue with red band).
- Never mix different refrigerants in the same cylinder; cross-contamination can render the refrigerant unusable.
Common Pitfalls
- Overfilling a recovery cylinder: always use a scale and stop at 80% fill.
- Using a recovery machine not rated for the refrigerant's pressure (e.g., using a low-pressure machine on R-410A).
- Venting refrigerant to atmosphere, which is illegal and harmful to the environment.
- Failing to evacuate the system to the required level before opening it.
Review Tasks
- Calculate the maximum fill weight for a 50-litre recovery cylinder for R-410A (density ~1.08 kg/L at 25°C).
- List the steps for recovering refrigerant from a system with a suspected compressor burnout.
- Explain the difference between recycling and reclamation, and give an example of when each is used.
- Describe the safety precautions when handling recovered refrigerant.
Installation, Commissioning, and Maintenance Standards
Syllabus Focus
- Installation best practices (pipework, electrical, ventilation)
- Commissioning procedures (evacuation, charging, performance testing)
- Maintenance schedules and tasks
- Compliance with relevant standards (EN 378, IMC, ACCA)
- Safety during installation and maintenance
Key Notes
- Installation must comply with the manufacturer's instructions and relevant standards (e.g., EN 378, IMC).
- Pipework must be properly sized, supported, and insulated; avoid sharp bends and ensure oil return.
- Electrical connections must follow local codes; use appropriate cable sizes and protection devices.
- Commissioning includes evacuation to remove moisture and non-condensables, charging with correct refrigerant quantity, and performance testing.
- Evacuation should achieve a vacuum of 500 microns or less; hold for 30 minutes to check for leaks.
- Charging should be done with the system off for liquid charging (if using liquid line) or vapour charging for small systems.
- Maintenance schedules include regular leak checks, filter changes, coil cleaning, and component inspections.
Must Know
- Know the evacuation levels required: 500 microns for most systems, 200 microns for systems with POE oils.
- Understand the importance of superheat and subcooling for system performance and troubleshooting.
- Be able to perform a performance test: measure temperatures and pressures, compare to design conditions.
- Know the requirements for ventilation in machinery rooms (e.g., ASHRAE 15, IMC).
Field and Exam Application
- When installing a new condensing unit, ensure the pipework is sloped towards the compressor for oil return, and install a filter drier.
- During commissioning of a VRF system, evacuate to 200 microns and hold for 1 hour; charge with R-410A using a charging scale.
- For a rooftop unit, check airflow (CFM) and compare to design; adjust belts or fan speed if needed.
High-Yield Distinctions
- Evacuation removes moisture and non-condensables; a deep vacuum (200 microns) is critical for systems with POE oils.
- Superheat is the difference between suction line temperature and saturation temperature; subcooling is the difference between saturation temperature and liquid line temperature.
- Liquid charging should be done into the liquid line (high side) with the system off to avoid slugging.
- Vapour charging is done into the suction line with the system running; never charge liquid into the suction line.
Common Pitfalls
- Not evacuating to the required level, leading to moisture and acid formation.
- Overcharging refrigerant, which can cause liquid slugging and compressor damage.
- Ignoring oil return in pipework design, especially in long line sets.
- Failing to perform a performance test after commissioning, leaving the system inefficient.
Review Tasks
- List the steps for evacuating a system with a vacuum pump and micron gauge.
- Calculate the target superheat for a system given outdoor temperature and indoor wet-bulb (use a charging chart).
- Describe the commissioning procedure for a split AC system.
- Identify three common maintenance tasks for a commercial refrigeration system.
Record Keeping and Logbook Management
Syllabus Focus
- Logbook requirements under F-Gas Regulation
- Information to be recorded (refrigerant type, quantity, leak checks, servicing)
- Retention periods and access for enforcement
- Electronic vs. paper logbooks
- Audit trails and compliance
Key Notes
- A logbook must be maintained for each system containing F-gases; it can be paper or electronic.
- The logbook must include: system identification, refrigerant type and quantity, dates and results of leak checks, quantity of refrigerant added or recovered, and servicing details.
- Records must be kept for at least 5 years and made available to enforcement authorities (e.g., Environment Agency) upon request.
- The logbook should be kept on site or accessible remotely; it is a legal requirement.
- Electronic logbooks can facilitate automatic reminders and data backup.
- Audit trails: any changes to the logbook should be traceable to the person making the entry.
Must Know
- Know the minimum information required in a logbook: system ID, refrigerant type, charge size, leak check dates and results, quantities added/removed.
- Understand that the logbook is a legal document and must be accurate and up to date.
- Be able to identify who is responsible for maintaining the logbook (usually the system owner or operator).
- Know that enforcement authorities can issue fines for non-compliance with record-keeping requirements.
Field and Exam Application
- For a supermarket with multiple refrigeration racks, maintain a separate logbook for each rack, recording all leak checks and repairs.
- When adding refrigerant to a chiller, record the date, quantity added, and the reason (e.g., leak repair).
- During an audit, present the logbook for the last 5 years; ensure all entries are legible and signed.
High-Yield Distinctions
- The logbook must include the CO2 equivalent of the charge, not just the mass.
- Leak check results must include the method used and the outcome (pass/fail).
- If a leak is found, the repair must be documented, including the date and method of repair.
- The logbook should also include records of fixed leak detection system tests.
Common Pitfalls
- Failing to record refrigerant additions, leading to inaccurate charge tracking.
- Not keeping the logbook on site or not having it available during inspection.
- Using a generic logbook that does not meet the specific requirements of the F-Gas Regulation.
- Forgetting to record the CO2 equivalent or using incorrect GWP values.
Review Tasks
- Create a sample logbook entry for a leak check on a system with 100 kg of R-134a.
- List the information that must be recorded when refrigerant is recovered from a system.
- Explain the retention period for logbook records and who can request access.
- Describe the advantages of an electronic logbook over a paper one.
Alternative Refrigerants and Flammability Safety
Syllabus Focus
- Low-GWP alternatives (HFOs, natural refrigerants, HFC/HFO blends)
- Flammability classifications (A1, A2L, A2, A3)
- Safety requirements for flammable refrigerants
- Handling and storage of flammable refrigerants
- Retrofit considerations
Key Notes
- Low-GWP alternatives include HFOs (e.g., R-1234yf, R-1234ze), natural refrigerants (CO2, ammonia, propane), and blends (e.g., R-454B, R-32).
- Flammability classifications per ISO 817: A1 (non-flammable), A2L (lower flammability, low burning velocity), A2 (flammable), A3 (highly flammable).
- A2L refrigerants (e.g., R-32, R-454B) have a burning velocity ≤10 cm/s and are allowed in many applications with additional safety measures.
- Safety requirements for flammable refrigerants include: ventilation, leak detection, electrical equipment rated for the refrigerant, and charge limits based on room size.
- Handling: use spark-proof tools, avoid ignition sources, store cylinders in well-ventilated areas, and follow manufacturer guidelines.
- Retrofit to alternative refrigerants requires compatibility checks (oil, seals, components) and may require system modifications.
Must Know
- Know the flammability classes and their characteristics: A1, A2L, A2, A3.
- Understand the charge limits for A2L and A3 refrigerants in occupied spaces (e.g., EN 378, IEC 60335-2-40).
- Be able to identify common alternative refrigerants and their GWP, flammability, and application.
- Know the safety precautions when working with flammable refrigerants: no smoking, use of gas detectors, and proper ventilation.
Field and Exam Application
- When installing a split AC with R-32 (A2L), ensure the room has adequate ventilation and the electrical components are rated for A2L use.
- For a supermarket retrofit from R-404A to R-448A (A1), check oil compatibility and replace filter driers.
- When handling propane (R-290, A3) in a small refrigeration unit, use explosion-proof tools and ensure the area is free of ignition sources.
High-Yield Distinctions
- A2L refrigerants have a lower flammability risk than A2 or A3; they are often used as drop-in replacements for R-410A.
- Natural refrigerants (CO2, ammonia, propane) have zero ODP and very low GWP but may have safety concerns (toxicity, flammability).
- Retrofit to a lower-GWP refrigerant may require system redesign, not just a simple swap.
- Charge limits for A2L refrigerants are based on the lower flammability limit (LFL) and room size.
Common Pitfalls
- Assuming all low-GWP refrigerants are non-flammable; many are A2L or A3.
- Using a non-spark-proof tool when handling flammable refrigerants.
- Overlooking the need for a risk assessment when using flammable refrigerants.
- Failing to check compatibility of materials (e.g., seals, gaskets) with the new refrigerant.
Review Tasks
- List three low-GWP alternatives for R-404A and their flammability class.
- Describe the safety measures required when installing a system with R-32 (A2L).
- Calculate the maximum charge of R-290 (propane) allowed in a room of 20 m² floor area and 2.5 m height, given an LFL of 0.038 kg/m³ and a safety factor of 0.5.
- Explain the steps to retrofit a system from R-410A to R-454B.
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 the F-Gas Regulation phase-down schedule and CO2 equivalent calculations.
- Practice leak detection methods and understand the frequency requirements based on CO2 eq thresholds.
- Master recovery procedures, including cylinder fill limits and safety precautions.
- Understand commissioning steps: evacuation, charging, and performance testing.
- Know the logbook requirements and practice creating sample entries.
- Familiarise yourself with alternative refrigerants, their flammability classes, and safety requirements.
- Verify any administrative details (pass mark, fees, booking) with REFCOM directly.
- Use official sources: REFCOM website, UK government F-gas guidance, City & Guilds, and relevant standards (EN 378, IMC).
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.