NU-22B is successfully being used in system applications ranging from residential to industrial. However, to use it safely, you must be knowledgeable in HVAC equipment refrigeration conversion to R-22 alternative refrigerant products. NU-22B Has: ASHRAE Safety Classification, A1 (Nontoxic/Nonflammable) Greater Capacity than Its Predecessor (R-417A) Operating Pressures Closer to R-22 than Any Other R-22 Replacement
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