This is an example of how to get different temperatures from a set temperature heat source.
This is an example of how to use a Gas Boiler to produce different water temperatures for 4 zones
(High / Low Temperatures)..
You will notice that in this example there are 3 possible water temperatures for the
heating zones. There is 1 zone for high temperature that
can feed radiators or baseboard convectors at whatever the boiler temperatures is set to.
There are 2 zones for a set temperature that could be used for pex radiant heat zones at
2 different water temperatures.
This is only an example.
Actual layouts vary from job to job.
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