In article , Roger Mills
writes

For balancing, quickly go round all the rads with your IR thermometer, and
note the flow and return temperature of each one. Then start turning the
lockshields down on the rads with the smallest temperature *drop*. Remember,
you're aiming to get the same drop on all of them - and you do this by
restricting the flow through the rads with too low a drop.

A good summary, I may borrow that ;-)

Although I do use the British Standard hand for the first pass.
--
fred
Plusnet - I hope you like vanilla