IE F-Gas Category III key terms

A synthetic gas containing fluorine that traps heat in the atmosphere, including HFCs, PFCs, sulphur hexafluoride and, in some contexts, HFOs. Stationary refrigeration and air-conditioning equipment commonly uses these substances.

A substance capable of breaking down stratospheric ozone, chiefly chlorofluorocarbons, halons, carbon tetrachloride, methyl bromide and hydrochlorofluorocarbons. Their production and use are phased out or tightly restricted.

A number expressing how much heat one kilogram of a gas traps over a set period compared with the same mass of carbon dioxide, which is fixed at 1. Used to compare refrigerant climate impact.

A relative score showing how strongly a substance destroys stratospheric ozone compared with CFC-11, which is set at 1.0. Values below one indicate a weaker effect on the ozone layer.

The mass of carbon dioxide that would produce the same warming effect as a given quantity of another greenhouse gas. Calculated by multiplying the gas mass by its GWP.

The quantity of refrigerant escaping from a system over a period, usually expressed as a percentage of the charge per year. It determines how often leak checks are legally required.

A structured inspection of a refrigeration or air-conditioning system using appropriate methods to find escaping refrigerant. Its frequency depends on the charge size and gas type.

A technique that senses refrigerant physically at the equipment, such as an electronic sniffer, UV dye, soap solution or pressure test. Contrasts with indirect methods that infer loss from performance data.

A check that infers refrigerant loss without sensing the gas itself, for example by reviewing pressure, temperature, energy consumption or visual signs such as oil traces and corrosion.

The total mass of refrigerant contained in a system or circuit. It is the key figure used to decide leak-check intervals, record-keeping duties and recovery requirements.

Equipment in which all refrigerant-containing parts are joined by welding, brazing or a permanent seal and cannot be opened without destroying the joint. Such systems often face lighter inspection obligations.

Collecting refrigerant from a system into a suitable container so it can be reused, reclaimed or destroyed rather than released to the atmosphere.

Cleaning recovered refrigerant on site by removing oil, moisture and particulates so it can be charged back into the same or similar equipment. It does not restore the gas to product specification.

Reprocessing recovered refrigerant in a dedicated facility to bring it back to a defined specification, verified by laboratory analysis. Reclaimed gas may be used in equipment belonging to others.

A pressure vessel designed and marked for holding recovered refrigerant, fitted with a suitable valve and never filled above its rated capacity. It must be clearly labelled with the gas identity.

Air or another gas that will not liquefy at normal condenser conditions and builds up in a system, raising discharge pressure and reducing efficiency. It is removed by a purging procedure.

A procedure that removes refrigerant from a circuit into a receiver or the high side of the system before service work, reducing the amount that must be recovered separately.

A valve used to close off a section of pipework so refrigerant can be confined to one part of the system during maintenance or leak repair.

A gas or volatile liquid used to expand foam insulation. Some older foams contain ODS or F-gas blowing agents that are released when the material is cut or disposed of.

A written or electronic log recording refrigerant quantities, equipment details, leak checks, repairs and recovery actions. It provides the audit trail required by F-gas rules.

The minimum time that F-gas records must be kept available for inspection, commonly five years. It applies to leak-check records, service logs and recovery documentation.

An organisation approved to assess and certify personnel and companies that handle fluorinated gases, confirming they meet the competence requirements set by regulation.

A document issued to a person who has passed the required assessment for the category of work they perform, such as installation, maintenance, leak checking or recovery.

A personnel certification category covering recovery of refrigerant from stationary refrigeration, air-conditioning and heat-pump equipment, and certain related service tasks, without full installation competence.

Refrigeration or air-conditioning machinery that is fixed in place rather than mounted on a vehicle or vessel. It is the main equipment type covered by F-gas containment duties.

The danger that leaking refrigerant displaces oxygen in an enclosed space, causing dizziness, unconsciousness or death. Risk rises in basements, plant rooms and small unventilated areas.

A structured review of the hazards and controls for a task before work begins, covering gas exposure, pressure, electricity, fire and access. It identifies the precautions needed on site.

Items worn to protect the worker from harm, such as gloves, eye protection, safety footwear and, where oxygen levels may fall, suitable respiratory protection.

Tissue injury caused by contact with extremely cold liquid refrigerant or cold metal parts. It requires immediate first aid and medical attention.

Refrigerant in its condensed liquid state, which can cause severe cold burns and rapid pressure build-up if trapped between closed valves. It must be handled with care during transfer.

A dangerous pressure surge caused by liquid refrigerant trapped in a closed section of pipe or a container that is then warmed. It can burst components, so trapped liquid must be avoided.

The supply and removal of air to keep refrigerant concentrations below harmful levels in a work area. It is a key control in plant rooms, basements and during recovery operations.

A refrigerant classified by its tendency to ignite, such as certain hydrocarbons and mildly flammable HFOs. Its use demands ignition-source control, ventilation and specific handling rules.

A safety component that opens to release pressure before a vessel or system is damaged. It must never be blocked or capped, and its discharge route must be safe.

The band of stratospheric ozone that absorbs most harmful ultraviolet radiation from the sun. Its thinning raises risks of skin cancer, eye damage and harm to ecosystems.

High-energy light from the sun that is largely filtered by stratospheric ozone. Increased exposure at ground level harms human health, crops and marine life.

The set of measures that keep refrigerant inside equipment, including sound design, tight joints, regular leak checks, prompt repair and careful handling during service.

Converting an existing system to run on a different refrigerant, often a lower-GWP alternative. It requires compatible lubricant, seals and components, plus updated labelling and records.

The controlled removal of a system from service, including recovery of all refrigerant and safe disposal of the equipment and any insulating foam.