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<edited, can't be bothered with negativity>

Norcon, I totally agree! Whilst they mention the heat leak radiator in the text, I think it's madness that it is only a "should" be fitted if the primary pipes flow/return pipes are <7M. :roll: This is why I seek advice from those who are experienced and not rely upon their destructions...

Hi Richardthe3rd, the output to water is 5KW. It is designed such that it can be used solely for DHW or both DHW and CH, in both situations there must be a gravity-fed heatsink radiator. Are you able to share any of this "dark art" or your expertise? Norton, the cylinder thermostat will be...

Hello and thank you for taking the time to reply, it is greatly appreciated. Just for clarification, an injector T is only required for a pumped heating system, which would require the Hi-Lo stats and electricity, you would then only get heating from the heat sink radiator should the power...

Hello, Currently installing the DHW parts for a Rayburn 216SFW boiler (Solid Fuel). Using the installation manuals and Document G / Document J of the building regulations I still cannot find answers to some queries I have. It is a gravity system on 28mm, <6M flow & return lengths. 210L...