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What type of antifreeze should.....

Howard_7 Member Posts: 11
What type of antifreeze should I use in the radiant floor?  It needs to be protected to +10*F.  Thanks in advance!


  • furnacefigher15
    furnacefigher15 Member Posts: 514
    propylene glycol

    You should use propylne glycol.
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,853
    edited December 2011
    Not just propylene glycol....

    but it should also be corrosion inhibited propylene glycol.

    And don't "guess" at how many gallons its going to take. Do the math and figure out how many gallons said tubes will hold, and then premix the glycol (30% minimum for corrosion inhibition) and pump that mixture in until said system is completely full.

    Don't forget to turn the makeup off and put a low water/low pressure cut off in.

    Don't use the RV type of non toxic propylene glycol antifreeze. It has NO inhibitors in it.

    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
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