Intergas combi boilers

[Dan Robinson]

My system is a ridiculous experiment..,. But it is based on a system boiler, slightly oversized rads, weather sensing, internal sensing and a carefully De-configured thermal store (for your purpose it is a good quality 150 litre unvented cylinder). Underfloor heating on the ground floor .

But some of it is a relatively new addition and the true efficiency is something I don't want to judge for a while. But that is largely due to the floor construct I have. (Solid with no insulation ).


My point is sizing for hot water is a dodgy path. Have you tried your shower at 9 litres?

Originally my thermal store was to do both heating and hot water, but a basic oversight on my part led me to disconnect the heating and try something else. I will return to the original experiment later.

Remember though that I do this for a living and as long as my wife is warm can do what I like. All it costs me is time. You are (hopefully) paying someone t o do the work as well as materials .

 

[hazetimesfive]

what was the oversight

 

[Dan Robinson]

Didn't realise that the DHW flow switch was jammed on effectively destratifying the store when in fact I was trying to work out the effectiveness (or not) of a dual zone thermals store making the most of wasted heat through the OT protocol.

Has since added a "pump on" neon indicator and have the circlip pliers to take the switch to pieces.

Found a tiny sliver of Grey PBEX pipe. Fook knows where it came from as there was none in that part of the system at that stage of the build.

I didn't realise the pump was running until doing some ancillary work nearby and heard the hum.