Some are quite large. Bathroom and toilet small ones. I think you are quite right in your assessment. I wish there was a simple formula based on number of radiators and size etc. Seems there is an art to tweaking in just right.
Hi folks,
First post here.
Currently in the process of looking at all energy saving advice and tips. Watched a lot of videos on "Range rating your boiler". Have to admit to being totally confused by the whole thing. Most of the advice comes from plumbers who seem to think us mere mortals...