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R407C and R410A in UK Commercial AC
R407C and R410A are two of the most common refrigerants in the UK commercial air conditioning installed base. While both are A1 non-flammable HFC blends used in similar-looking split and multi-split systems, they have distinct properties that affect how they are charged and serviced.
Key Differences at a Glance
| Property | R407C | R410A |
| GWP | 1774 | 2088 |
| Blend type | Zeotropic | Near-azeotropic |
| Temperature glide | ~7°C | ~0.1°C |
| Operating pressure | Lower | Higher |
| Oil type | POE | POE |
Temperature Glide: The Critical Difference
R407C has a temperature glide of ~7°C — its bubble and dew points differ significantly. This means:
- R407C must always be charged as a liquid to prevent fractionation
- PT charts show separate bubble and dew point pressures
- Never top up R407C with vapour from a low cylinder
R410A has near-zero glide and behaves closer to a single-component refrigerant in practice.
Practical Servicing Notes
R407C operates at lower pressures, making it more forgiving for engineers transitioning from R22 systems. R410A requires high-pressure-rated gauge sets. Browse our full refrigerant range for both gases.
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R407C 10kg Refrigerant Gas
R22 retrofit-compatible R407C. Refillable cylinder, fast UK delivery.
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