"IMM" wrote in message
...

"John Aston" wrote in message
.. .


Thank you for taking the time to compose this reply, I appreciate your
thoughts. I believe that I understand the principle of the heat store
and
the principle of a modulating boiler. They both have their advantages.
I'll get some prices together and put my best foot forward.

In your case with having three differing functions of different
temperatures
a heat bank is the ideal way to supply those temperatures promoting
maximum
efficiency from the boiler.

The most efficient, and easiest, is having two boilers as described above.


IMM, leaving my particular case to one side, may I ask in what application
would you recommend the use of a weather-compensated modulating boiler?