The most common change would be to operate the boiler on a lower water temperature during the warmer parts of the heating season. The rads should already be sized for the coolest party of the season so any warmer days would be ok.
The truthful side.
I'm sure they are.
I'm sure it won't be, but, to date, how many people who have had condensing boilers installed have, at the same time, replaced their existing radiators, and possibly pipework to divide the house into zones?
That would certainly be my situation.
One imagines not many. In my case, although the system is already divided into several zones, replacement of radiators and some pipework would be a very major undertaking ....
In my case, I'm not sure that I would put money on that occurring during my lifetime. An issue for future generations to address, perhaps - provided that there is then still some gas left for them to burn in their boilers.
You'd need two somethings (or, at least, two bits of the same something) to test for 240V!
Depends how fat they are.
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