Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

DHW Hot Water Recirculation with Indirect Heater

Options
Hi I'm using a boiler for space heating and an indirect hot water heater for DHW, are there any issues with using hot water recirculation with this set up? I can't imagine there would be since the source of the heat for the DHW shouldn't matter, right? Thanks for your time and consideration.

Welcome

It looks like you're new here. Sign in or register to get started.

Comments

  • heathead
    heathead Member Posts: 239
    Some Indirect water heater have a special place for the return line.
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,897
    Hi @joodokick , Although your indirect should be able to keep up easily with any heat loss from a recirc line, I'd do what's possible to keep the recirc function efficient. I prefer "on demand" pumping as it prevents over 90% of the heat loss from a recirc line. I've dealt with recirc lines that triple the water heating bill. :# 24 hour pumping can cause erosion damage to any copper piping also. I'd also install valves so you can flush the line or tank individually along with a good, quiet spring check valve.

    Yours, Larry
    kcopp
  • joodokick
    joodokick Member Posts: 15
    heathead said:

    Some Indirect water heater have a special place for the return line.

    Thanks, I have been having trouble finding one, hence the question.
  • joodokick
    joodokick Member Posts: 15

    Hi @joodokick , Although your indirect should be able to keep up easily with any heat loss from a recirc line, I'd do what's possible to keep the recirc function efficient. I prefer "on demand" pumping as it prevents over 90% of the heat loss from a recirc line. I've dealt with recirc lines that triple the water heating bill. :# 24 hour pumping can cause erosion damage to any copper piping also. I'd also install valves so you can flush the line or tank individually along with a good, quiet spring check valve.

    Yours, Larry

    Thank you, we were planning to go with a temperature controlled system, insulated pex lines (all within conditioned space) and all the appurtenances you recommend.

Welcome

It looks like you're new here. Sign in or register to get started.

Welcome

It looks like you're new here. Sign in or register to get started.