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Author Topic: Manifold Calculator  (Read 519 times)


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Manifold Calculator
« on: September 27, 2015, 06:05:05 AM »

Hey, been some time since I posted!

I've been doing some work on hydronics lately and I created a handy manifold calculator that may come in handy if you are looking for flow and Btu numbers from your loops.  This worksheet is based off a constant pressure scenario, a pump such as Grundfos Alpha, running in a constant head setting is how it works.  There are two tabs on the worksheet, one for 1" supply&return ports x 5/8" zone ports, and one for 3/4" supply & return ports x 1/2" zone ports.

The blue cells are manual entry of variables, all the white cells are calculated.  What variables you will need to make full calculations:
  • Distance of header pipe
  • Delta T, intended temperature drop of system
  • Percent of water vs antifreeze, (I used methanol for the built in specific heat calculations)
  • Head pressure maintained by circulator.
  • Distance of pipe for each of the zones/loops.
  • Optional: manual entry of resistance for balancing each of the zones/loops.


Enjoy!   :thumbup:

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