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Hot Water - Fixture Units

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#1 sweiter


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Posted 03 December 2012 - 10:52 AM

Is there something special that needs to be done to calculate Hot Water fixture units?  They never seem to calculate back from each fixture point where the fixed unit is applied.  I double checked to make sure the arrows are pointing away from the water heater towards each fixture, as well as making sure the sizing table is all the same.
We live in a 3D world, why draw in 2D?

#2 David Robison

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Posted 03 December 2012 - 11:51 AM

Looking at the project you sent previous, it looks like the initial pipes in your hot water systems are 0-length pipes. They are vertical pipes that start and end at the same elevation. If you adjust that to give them length, the calculation should work.

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