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Gasman, as I now understand it, that approach would mean most of the time the condensing boiler was not condensing. I read one has to adjust the system to return a low as possible to the boiler to help with creating the condensing environment within the boiler. This makes a significant...

I really appriciate the inputs made from you both - I think everyone on here is so helpful. Oilman, we be of one mind. The truth is even now I sit here in 3 layers heating 1 room. This is OK for me but not when I am entertaining, the missus is here etc. The house simply will not warm at the...

I am soon to invest in a Worcester Bosch 15ri Condensing boiler. Since before hand, I need to add four rads to the existing 8kw (total) rads and replace 1 rad; it seems sensible to account for the new condensing boiler in the calculations for these new radiators. There was no easy way to get...

Oh yes the entire system uses one electical isolator point so were ok on that point - but thanks for pointing that out and for all the advice so far.

Ah I see - so if the flow stat died it would just carry on heating indeffinately. That's a great point, I had never thought of that :idea: I inherrited the current system with the house (7 years ago) and it's been a total chamber of horrors to get right I must say. The boiler was plumbed...

The current boiler has a thermostat on the flow, but I am not quite sure if that's what you mean and therefore if it has one. Not sure why you ask, but if it's in relation to the noise issue. The noise is only from the fan, when it runs and casing which rattles slightly due to the fan vibration...

This is my first ever post - so please go easy on me. I appologise in advance if I have made some fo pa unwittingly! I am considering installing a new Vaillant 24w Combi boiler in place of the pressurised (converted) Apollo Fanfare unit. This is reliable, but not very efficient, slightly...