IMM wrote:

Depends on the boiler. Most condensing boiler "modulate" on marinating a
setpoint flow temp.

"Adam" had a good run and so, now, has "IMM". You should change your
name to Mr. Malaprop next. Oh, and try looking up the meaning of
"mentalist" some time.

Only the up market boilers modulate on load compensation.

Serious question: please explain in a concise but rigorous manner
/exactly/ what "load compensation" means in this context.

--
Andy