ASHRAE
R-508B; A1 Safety Classification

Replaces
R-13, R-23, and R-503

Applications
Very low temperature [below -40°F to -150°F (-40°C to -101°C)]:
medical freezers
environmental chambers

Benefits
Endorsed by many OEMs.
Longer equipment life: Lower discharge temperature than R-23, increases compressor service life.
Increased cooling capacity: 30% greater cooling capacity than R-13.
Best match for R-503.
Lower retrofit cost than R-23.

Phaseout Schedule
Consult the specific regulations in your country or region.

Lubricant Recommendation
POE