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Again, many thanks for your reply, I owe you a pint!! I was under the impression that with the CM927 being able to control 4 zones, one zone could be downstairs and the other could be upstairs, however this doesn't seem to be the case. Would i be better going for two of the Y6630B's (one...

Many thanks for your advice guys. Would this work - Honeywell CM 927 connected to three receivers, one each for up and down and a third for hot water. CM 927 would act as the downstairs thermostat and I was thinking of the Y6630 to act as the upstairs wireless thermostat. ? The valves...

As far as I am aware, there are two seperate zones (up and down) seperated by valves. The boiler is for Central Heating. Hot water is via a cylinder (which apparently is also heated by boiler?) I'm thinking along the lines of the Honeywell wireless thermostats, one for each zone. Is there...

Installer is being a nightmare. Been pestering him for weeks over what I need for thermostats, now that house is plastered I have no choice but to go with wireless and he still not returning my calls!!

The only thing I can think of with two programmable thermostats is having to change both when you want to adjust the heating. Is this hard to do? Could I use one of the CM927s to control the entire system and as the downstairs thermostat and use a single wireless thermostat for upstairs?

I am having a CH system installed and need two wireless thermostats, one for downstairs and one for upstairs. Can anybody advise as to what ones to get that will work without interfering with each other?