Solstice N15 R515B

Solstice® N15 (refrigerant designation R-515B) is an azeotropic HFO-HFC refrigerant blend developed by Honeywell to provide an environmentally friendly alternative to R-134a. It features a significantly lower Global Warming Potential (GWP of approximately 293–299, AR4/AR5) and zero ozone depletion potential (ODP = 0).

This blend is classified as non-flammable (ASHRAE A1) and maintains thermodynamic and efficiency performance comparable to R-134a, enabling smooth transitions toward lower-GWP technologies and compliance with the latest F-Gas regulations. Furthermore, Solstice® N15 can offer advantages such as lower discharge temperatures and an operating envelope similar to that of HFO-1234ze.

It is miscible with POE (polyolester) lubricants recommended for use in modern HVACR systems designed for medium-temperature applications, air conditioners, chillers, and heat pumps.

Refrigerant Code: R-515B

Trade Name: Solstice® N15

Flammability Class: ASHRAE A1 (non-flammable)

Blend Type: Azeotropic HFO-HFC

Composition: R-1234ze / R-227ea (≈91.1% / ≈8.9%)

GWP (IPCC AR4/AR5): Approximately 293–299 (≈77% lower than R-134a)

ODP: 0 (non-ozone depleting)

Lubricant Compatibility: Miscible with POE

Zero Temperature Glide: Yes

Performance: Efficiency and capacity similar to R-134a

Available Formats:

• 13 L Returnable Cylinder – 12 kg

• 40 L Returnable Cylinder – 40 kg

• 920 L Returnable Drum – 900 kg

• Medium-temperature (MT) commercial refrigeration (supermarkets, cold rooms, and standalone units)

• Air conditioning and HVACR systems for positive-temperature applications

• Remote condensing units and multi-plex (rack) systems

• Cascade systems (medium-temperature stage)

• Flooded systems and various industrial applications