R515B Solstice® N15

R-515B (Solstice® N15)

Very low GWP (293) A1 safety class, energy-efficient alternative to traditional refrigerants for air-cooled and water-cooled chillers in a range of applications including supermarkets, commercial buildings and crane cab air conditioning.

Features and Benefits

  • Very Low GWP – Long term sustainable and compliant with F-Gas legislation
  • Azeotropic refrigerant blend – can be used in direct expansion and flooded systems. Negligible temperature glide.
  • Comparable energy efficiency to R-134a – Lower indirect emissions and lower operating costs.
  • Approved by equipment manufacturers –New equipment available.
  • A1 (non-flammable) safety class – Ideal retrofit candidate for R-227ea.

Packaging and Supply

  • Climalife supply R-515B in 12.5kg and 60kg returnable cylinders.
  • Conforms to AHRI 700-2016 specifications.

Why Choose Climalife?

Climalife are a key player in the distribution of refrigerants and other climate control products, with a nationwide distribution network and product knowledge that is second to none.

How does R-515B compare to R-134a?

R-515B has a lower cooling performance compared to R-134a but good energy efficiency making it an ideal very low GWP alternative to R‑134a in new equipment.

Full theoretical performance comparisons at customer specified conditions are available from Climalife on request.




HFO-1234ze(E)/HFC-227ea - 91.1/8.9% by mass

Chemical Formula



Molecular Mass


Boiling Point (at 1 Atmosphere)


Dew Point (at 1 Atmosphere)


Saturated Liquid Density at 25°C

1180.9 kg/m³

Saturated Vapour Density at 1.013bar

5.875 kg/m³

Saturated Liquid Pressure at 25°C

4.954 bar

Saturated Liquid Pressure at 50°C

9.914 bar

Latent Heat of vapourisation at 1.013bar

190.0 kJ/kg

Thermal Conductivity of Liquid at 25°C

73.2 mW/(m.K)

Thermal Conductivity of Vapour at 25°C & 1.013bar

13.8 mW/(m.K)

Surface tension at 25°C

8.76 mN/m

Viscosity of Liquid at 25°C

0.193 mPa.s

Viscosity of Vapour at 25°C & 1.013bar

0.012 mPa.s

Specific heat of liquid at 25°C

1.367 kJ/(kg.K)

Specific heat of vapour at 25°C and 1.013bar

0.8822 kJ/(kg.K)

Cp/Cv ratio at 25° and 1.013 bar


Lower Fammability Limit (LFL) in air (EN 378)


Flash Point


ISO 817 / ASHRAE 34 Safety Classification


PED Fluid Group


Ozone Depletion Potential (ODP)


Global Warming Potential (GWP) IPCC AR4/IPCC AR5


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