On 18 Oct 2004 21:05:27 -0700, (andyd) wrote:

ive recently had a new ideal isar he35 fitted, the user instructions
say 'set the boiler thermostat to maximum and switch on' my question
is what would be the most economical way to run this type of boiler? i
presume on the maximum setting the boiler throws the heat out until
the room thermostat switches it off, if however the boiler thermostat
is set to a mid position would the boiler switch itself on and off
until the room thermostat was satisfied? if this is correct which
method would be most economical in terms of gas usage and boiler wear
and tear

thanks in advance

andyd

This is a modulating, condensing boiler and will operate at its
maximum efficiency at lower temperatures. However, if you are
connecting it to an existing set of radiators which were designed for
a conventional boiler temperature of 82 degrees, then in very cold
weather, you may need to have the boiler running at this temperature.

The Isar boiler will automatically set its own temperature and gas
burn rate to match the heat requirement for the house, while trying to
run at the lowest temperature. Therefore it's reasonable to set the
thermostat high and let it do its own thing.




..andy

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