Which refrigerant is covered by the requirements of EC Regulations 517/2014?

The correct answer, R404A, is covered by EC Regulations 517/2014, which is part of the European Union's legislation aimed at controlling the use of fluorinated gases, including specific refrigerants known for their high global warming potential (GWP). R404A is a blend of hydrofluorocarbons (HFCs) and has a significant GWP, making it subject to the regulations intended to reduce emissions and phase down the use of these harmful substances.

These regulations provide frameworks for the production, distribution, and use of fluorinated gases, setting limits and controls on refrigerants based on their environmental impact. R404A, due to its GWP, falls under specific provisions that include bans on its use in new equipment and restrictions on its refill and maintenance in existing systems.

The other refrigerants listed are also relevant in the context of F-Gas regulations, but their regulatory status may differ. R134A, R410A, and R22, while they may be subject to various regulations, do not have the same level of restriction or phase-down timelines as R404A under the current EC Regulations 517/2014, particularly when considering their impact on global warming and their phase-out statuses.