This year Honeywell has introduced a system (Honeywell evohome) in which you can control the temperature in every room individually and also send a signal to the heating boiler from every room. (When you open up a radiator-thermostat but the heating boiler is off, the room does not heat up).
For example you can heat up the bathroom only at times the bathroom is used. (Currently it is heated up every time the thermostat in the livingroom calls for heat).
It looks like a good system to reduce energy costs. See: http://www.evohome.info
It is using 868 MHz frequency to cummunicate between all devices.
Does anybody have experience with this? And can you really save a lot of energy with this system? Are there alternatives (from other manufacturers) available?
I read here z-wave.com/modules/iaCM-ZW-PR/readMore. ... =506462208
that Danfoss will be introducing a simular system soon.