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DHW heat loss through pumps.

 
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Domestic Hot Water & Cylinders
Last Post by JamesPa 1 hour ago
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 ngillam
(@ngillam)
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Topic starter 19/11/2025 11:29 am  

Posted by: @jamespa
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Posted by: @ngillam
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@jamespa I tried to discuss with kids, I got a couple of eye rolls....and one tutted!

 

Exactly.

It strikes me that grey water recovery might be a simpler and more robust way to 'save' the water.  There is still some heat lost though.  A smart tap that turns the pump on but then only turns the tap on when the water comes through hot is the ultimate solution.  Are we overthinking this problem?

A shower directly next to the HW tank......or a shower head off the tank 😀 

 


This post was modified 1 hour ago by JamesPa

   
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 JamesPa
(@jamespa)
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19/11/2025 11:45 am  

Posted by: @ngillam
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A shower directly next to the HW tank......or a shower head off the tank 😀 

Which is exactly how houses used to be designed (and I suspect mass designed houses still are).  Put all the plumbing as close together as possible.


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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