REFRIGERANT
R-421B
Replaces R-502, R-22, R-507a, R-404A, R-402A & B, R-408a and
One Shot® (Isceon 79) in Multiple Stationary Applications
Save Time and Save Money with a Quick and Easy Conversion to Choice R-421B.

Choice R-421B is non-ozone depleting, non-flammable and non-toxic.
Choice R-421B can replace refrigerant in new and existing equipment.
Choice R-421B has at least a 20% lower global warming potential.
Choice R-421B has a lower compression ratio than R-404A and R-507A.
Choice R-421B can be used with Mineral, AB or POE oils.
Choice R-421B is a long term option for low temperature applications.
Choice R-421B provides adequate oil return and requires no engineering changes.
Choice R-421B can be topped off following repair of a system leak.
Choice R-421B can be used in a wide variety of applications including:

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