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  1. K

    Upgrading a Horstmann E7BX Unit

    Got this reply from Horstmann: Thank you for your enquiry, the E7bx unit works off 2 inputs one is available 24 hrs a day where the other is only available during economy times set by your energy supplier. Where as the Electronic 7 (Digital display) works with only one power input and the...
  2. K

    Upgrading a Horstmann E7BX Unit

    From what I’ve read, I think the Electronic 7 needs a permanent feed to it.
  3. K

    Upgrading a Horstmann E7BX Unit

    As per the title. I’m looking to get a bit more control over when I want the hot water boosting etc & the Hoffmann Electronic 7 looked to be an ideal solution. However when doing a bit of reading it appears that I can’t use it as a replacement for the E7BX. Is there an alternative that I can use?
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