| R290 (propane) | R134a | |
|---|---|---|
| Type | Hydrocarbon, a natural refrigerant. | HFC, a synthetic refrigerant. |
| Global warming potential | Very low, in single digits. | High, in the region of 1,300 to 1,430 times that of carbon dioxide over 100 years, depending on the assessment used. |
| Ozone impact | None. | None. HFCs do not deplete ozone, which is why they replaced older CFCs. |
| Flammability | Highly flammable (safety class A3). Systems use small charges, sealed components and spark-free electrics. | Non-flammable (class A1). Fewer installation and service precautions. |
| Efficiency | Generally good. Well-designed R290 cabinets often use less energy than equivalent R134a designs. | Reasonable, but usually needs more refrigerant and a larger compressor for the same capacity. |
| Charge size | Small. Safety standards cap the amount allowed in each circuit, which limits use in large single systems. | No flammability limit on charge, so it can be used in larger single-circuit systems. |
| Servicing | Technicians need hydrocarbon training, leak detectors, ventilation and safe recovery procedures. Not every local mechanic is equipped. | Widely understood. Parts and gas are easily available across India. |
| Retrofitting | Do not put R290 into a system designed for R134a. Components and electrics are not rated for flammable gas. | Existing R134a systems can keep running and be serviced, but gas availability may tighten over time. |
| Future outlook | Aligned with the HFC phase-down. Increasingly common in new commercial cabinets worldwide. | Supply and cost exposed to the phase-down over coming years. |
| Hot-climate behaviour | Runs at higher pressures than R134a but performs well at high ambients when the system is designed for it. | Lower pressures and capacity, so cabinets need larger compressors and coils to cope with 43 °C rooms. |
Choose r290 (propane) when…
- You are buying new self-contained cabinets and want lower running cost and a future-proof refrigerant.
- Sustainability reporting or your customers' requirements favour low-GWP refrigerants.
- You have access to service technicians trained on hydrocarbon systems.
- The equipment is plug-in with a small sealed circuit, which is where R290 fits best.
Choose r134a when…
- You are maintaining existing R134a equipment that is working well.
- Your site is in an area where trained hydrocarbon service is not available.
- You need a larger single-circuit system where flammable charge limits are a problem.
- You are matching an existing fleet of R134a units for uniform spares and servicing.
The verdict
For new plug-in commercial refrigerators and freezers, R290 is generally the better choice: very low climate impact, good efficiency and alignment with India's HFC phase-down. Its flammability is managed by design, through small charges and sealed electrics, but it does demand trained service. R134a remains reasonable for keeping existing equipment running. Do not retrofit one gas into a system designed for the other, and when buying R290 equipment, ask who will service it in your city before you commit. Also check the nameplate: it tells you the refrigerant and charge, which any technician will need before working on the unit.