Hey,

I have one of this mural central heaters burning methane gas, namely Vaillant aquaPLUS VUI 282-7. Here is a spec sheet of its larger sister file:///tmp/mozilla_kellogs0/aquaplus-installation-manual-261438.pdf, but otherwise very similar if not the same. Cost wise, in order to achieve the same room temperature, would it be better to:

a) have more frequent fires at lower radiators temperature

or

b) have less frequent fires at higher radiators temperature

Thanks!