Whether it’s a walk-in chiller for a restaurant or a large industrial freezer store, choosing the right refrigerant for a cold room is key to reliable, efficient, compliant operation.
Match the refrigerant to the temperature
- Medium temperature (chillers, ~0 to 5°C) — R134a, R513A, R449A and similar
- Low temperature (freezers, below ~-18°C) — R448A, R449A, CO2 or hydrocarbons
Factors to weigh
- GWP and compliance — choose low-GWP to future-proof against the phase-down
- System size and type — larger systems may suit CO2; small integral units suit hydrocarbons
- Efficiency — directly affects running costs
- Retrofit vs new — retrofits favour drop-in-class blends
Don’t forget the practicalities
Consider refrigerant availability, engineer familiarity, and the safety class (A1 vs A2L vs A3) which affects charge limits and installation requirements.
FAQ
What refrigerant is best for a freezer cold room? Low-temperature applications commonly use R449A or R448A as R404A replacements, with CO2 and hydrocarbons for new low-GWP installations.
Browse our full refrigerant range in the online shop.