Antifreeze, other know as “Glycol” has different heat transfer properties depending on whether it is Propylene or Ethylene glycol.  Choosing which type depends on your application.  Most importantly, do not use automotive antifreeze because it will break down much sooner than an industrial antifreeze “Glycol”

Chiller Antifreeze Freezepoints & Mixtures

 

Dowtherm SR1- Freezepoint

+26F for 10% Mix

+16F for 20% Mix

+10F for 25% Mix

+4F for 30% Mix

-4F for 35% Mix

-12 F for 40% Mix

-34F for 50% Mix

Dowfrost HD-Freezepoint

+27F for 10% Mix

+19F for 20% Mix

+14F for 25% Mix

+8F for 30% Mix

+1F for 35% Mix

-7F for 40% Mix

-28F for 50% Mix

60%

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