R290, R410A or R32: choosing a refrigerant for portable air conditioners
Refrigerant choice affects efficiency, service practice, safety documentation and how a product is received in different markets. Here is the trade-off in plain terms.
Why the choice is not purely technical
Refrigerants are compared on efficiency, pressure, flammability class and global warming potential. The lower the global warming potential, the more attractive the refrigerant looks under tightening regulation, but the same molecule may also carry a flammability class that changes how the product must be designed, documented and serviced.
R290: low global warming potential, extra safety work
R290 is propane, with a global warming potential of about 3 and an A3 flammability classification. It is widely used in low-charge portable and small sealed systems, and the charge is limited by the applicable safety standard. Because it is flammable, the design, the leak-testing routine, the warning labels and the service instructions all carry extra requirements.
Where a market accepts R290 for portable equipment, the combination of good efficiency and a very low warming potential is attractive. The cost shows up in documentation and factory controls rather than in the refrigerant itself.
R410A and R32: familiar service, different trade-offs
R410A is non-flammable and familiar to service networks, but its global warming potential of about 2,088 makes it a target under phase-down schedules in several regions. R32 sits in between, with a global warming potential of about 675 and a mildly flammable A2L classification that also carries design and labelling obligations.
For export programmes, the practical question is which refrigerant the destination market will accept for portable equipment, and whether the local service network can handle the safety class.
How to decide for a programme
Most buyers settle on one or two refrigerants per platform and then keep them stable across the range, because changing refrigerant means re-testing efficiency and re-issuing labels.
- Confirm which refrigerants the destination market accepts for portable units
- Check the maximum charge the safety standard allows for the product type
- Plan the safety documentation set alongside the efficiency test
- Keep spare parts and service training aligned with the chosen refrigerant
