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Refrigerant Type Used in Sub-Zero Products


  • What type of refrigerant is used?
  • What kind of freon is used in Sub-Zero products?
  • Is R134a used in 500, 600, 700, Designer (formerly Integrated), UC, and BI models?
  • Is R600a used in PRO models?
  • What kind of refrigerant is used in 500, 600, 700, Designer, UC, and BI models?


  • Before 1994, Sub-Zero models were manufactured with R-12 refrigerant.
  • Starting in 1994, products use R-134a refrigerant, except for the newer PRO series models.
    • PRO 36 and PRO 48 models use R600a refrigerant.
    • 648PRO models use R-134a refrigerant.
  • All new refrigeration products introduced to the market after January 2021 will use R600a Hydrocarbon Refrigerant.
  • To determine when a model was manufactured, refer to Sub-Zero Model Number Timeline.

Contact the Sub-Zero Customer Care Team at [email protected], or call (800) 222-7820, Monday-Friday, 8:00 a.m. - 5:00 p.m. CST.


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