Refrigerants

ASHRAE 34 Flammability and Toxicity Classifications

GWP Tends to Go Up as Flammability Goes Down

• Most existing refrigerants are A1, meaning lower toxicity and no flame propagation
• Many lower GWP refrigerants are class A2L – slightly higher flammability 
  A2Ls are Still Safe
• Require higher energy to ignite than A2 and A3
• Lower burning velocity; flame propagates more slowly

Daikin has selected R-32, R-1234ze, R-513A, R-515B, and R-1233zd(E) to each optimize the unit operation based on the compressor type, operating temperature range and LCCP impact