"Doctor Drivel" wrote in
reenews.net:

... The DHW cylinder sensor (not
sure of price) and the Opentherm standard room temp
controller/programmer/optimiser fitted (Keston use the Honeywell
Chronotherm, which can be bought a lot cheaper elsewhere rather
than the £133 Keston ask for it)...

Err... The programmer badged by Keston is the Theben Ramses 850 OT.
See:
http://www.theben-ag.com/fileadmin/d...ES%20850%20OT%
20neutral_2007_01_309%20872_GB.pdf

The reference to OpenTherm has nothing to do with the Honeywell
Chronotherm, but to the OpenTherm protocol used for data communication
between the boiler and the controller. See:
http://www.opentherm.org/

Kind regards

--
Richard Perkin
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