heat exchanger

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  1. A

    Splitting and rejoining water supply lines

    I am making a heat exchanger for my shower trap arm. I have a 2" section of copper drain pipe that I want to coil the incoming water supply line around, before the supply feeds into the 3/4" inlet of my on-demand water heater. I already tried and failed at coiling 3/4" soft copper tubing around...
  2. L

    Circuit for heat exchanger water heaters

    Hi, I'm a bit stuck on a hot water circuit that I'm trying to come up with for a small guest house. I have 6 water heaters with built-in heat exchangers that I'm planning to connect to a loop, itself fed by a solar water heater and/or a heat pump. I came up with 3 options (see drawings), but...
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