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New system help

I'm installing a new rad floor staple up system in my son's 1500 sq ft single story house. We will be using 1/2 pex with 2 lines in each joist cavity.  I have used a watts mixing valve with success in other systems I've installed,but I'm wondering if there may be a more efficient piping scheme.  He is on a minimal budget so mixing blocks are out of the question.  We will have 3 zones, 2BR zones and a LR/ KIt zone.  We have 007 pumps (used but in good cond) available to use and are hooking to a Weil Mclaine CG-4. . The house was built in the 40's with little insulation.  As he can afford to tear out the plaster he insulates the outside walls, and there is 9" of glass n the ceiling. I'm open to thoughts opinions and drawings
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Comments

  • SWEISWEI Posts: 4,932Member ✭✭✭✭
    spend a few bucks more

    and get a Taco iSeries-R mixing valve.  The increase in comfort and efficiency is significant, and it also takes care of boiler return water protection.
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