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is the flow rate of cold water entering the water heater = hot water being used?

is the flow rate of cold water entering the water heater = hot water being used?


  #1  
Old 05-01-17, 10:04 PM
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is the flow rate of cold water entering the water heater = hot water being used?

I am trying to size a whole house water filter and need to estimate the flow rate of cold water entering the water heater as hot water is consumed. Are these two rates the same, or is the cold water entering the water heater tank at a slower rate than it is being consumed?
I measured the water that's flowing out of the shower head at 4.5 gpm.

Thank you!
 
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Old 05-01-17, 10:17 PM
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Welcome to the forums.

The flow in equals the flow out. Drop for drop.
 
  #3  
Old 05-02-17, 01:41 AM
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4.5 GPM? Is this some sort of huge body spray, rain head or something. Pretty sure that showers have flow limiters. Sort of like toilet regulations. Of course some are removable, some companies even include instruction on how to do it. With all the requisite warnings and notices of course. 4.5 GPM still sounds like a lot. That would drain a typical water heater down to a luke warm temp in less than 10 minutes, probably more like 5.
 
 

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