Transitioning to low-GWP refrigerants
A low-GWP refrigerant transition is the planned replacement of high global-warming-potential refrigerants in process cooling and refrigeration with lower-impact alternatives, driven by regulation and emissions goals. It addresses both the direct emissions from refrigerant leakage and the longer-term availability and cost of phased-down refrigerants.
What it is
Refrigerants vary enormously in global warming potential, and phase-down regulations are progressively restricting the high-GWP fluids. A transition is the deliberate move to lower-GWP alternatives — through retrofitting existing plant where compatible, or replacing it with systems designed for natural or low-GWP refrigerants. It covers the engineering, safety and operational changes the new fluids require, not just swapping the gas.
Why it is done
Refrigerant leakage is a direct greenhouse-gas emission, and high-GWP fluids contribute heavily per kilogram lost. Regulatory phase-downs are also tightening supply and raising the price of these refrigerants, creating a business risk for plant that depends on them. Transitioning reduces direct emissions, removes the exposure to refrigerant scarcity, and future-proofs cooling assets against further restriction.
How it is done
The refrigerant inventory and leakage record across the site's systems are reviewed against the regulatory phase-down timetable to prioritise the highest-GWP and leakiest plant. For each system, the options — drop-in or retrofit alternative versus full replacement with a system designed for a natural or low-GWP refrigerant — are assessed for efficiency, safety and cost. Where the new fluid is flammable or toxic, the necessary safety measures are engineered in, and the change is implemented with leak-tightness verified and operators trained.
- Inventory refrigerants
- Map phase-down timetable
- Prioritise high-GWP plant
- Assess retrofit vs replace
- Engineer safety measures
- Implement and verify
What to watch for
Ignoring the flammability or toxicity of some low-GWP alternatives, which demand different safety engineering, is a serious hazard. Retrofitting a refrigerant a system was not designed for can cut efficiency or reliability, and leaving the leakiest plant until last wastes the largest emission reductions.
Related practices
Switching a boiler from fossil fuel to biomass
Integrating an industrial heat pump
Electrifying process heat
Related topics
Carbon Footprint · Carbon Intensity · Net Zero
Common in: Food Processing · Dairy · Brewing & Beverage · Chemicals · Pharmaceuticals