Had a quote for complete new CH system including Worcester Greenstar 28i Junior.
Not sure I totally understand this, hence asking here: I was pretty surprised at how small the rads spec'd were as I thought condensing boilers needed as low a return temp as possible? The installer (WB accredited) is telling me that once the boiler gets going there will be hardly any difference between flow and return temp, and the rads are rated assuming flow temp of 75C.
Am I mis-understanding or does this seems far too high? Indeed the boiler's user guide suggests running the CH at between 1 & 2 on the dial - around 50C - and it also says "the radiators may need upgrading", which I assumes means "replaced with bigger ones!".
Not sure I totally understand this, hence asking here: I was pretty surprised at how small the rads spec'd were as I thought condensing boilers needed as low a return temp as possible? The installer (WB accredited) is telling me that once the boiler gets going there will be hardly any difference between flow and return temp, and the rads are rated assuming flow temp of 75C.
Am I mis-understanding or does this seems far too high? Indeed the boiler's user guide suggests running the CH at between 1 & 2 on the dial - around 50C - and it also says "the radiators may need upgrading", which I assumes means "replaced with bigger ones!".