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In many systems, it is possible to remove all of the existing HCFC refrigerant and replace it with a "retrofit" HFC gas.
Often, we can offer retrofit gases that are a "drop in" replacement that require minimal system changes, such as adjustment to expansion valves, and often require no oil changes.
These diagrams illustrate how HCFC gases may be replaced in refrigeration and air conditioning systems.
NB: Natural refrigerants such as R717 (Ammonia), R744 (Carbon dioxide) and hydrocarbons are excellent refrigerant gases, however due to their physical properties (e.g., pressure, flammability, toxicity) they are not suitable for use as a retrofit gas in existing installations.