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Okay, thanks for the advice, one and all. It would seem that the OJ stat has a selector that must be set to a specific output and that in turn operates a specific actuator/zone. So a "bog standard" 2-wire stat won't do as it hasn't got that ability. - unless anyone knows different??? The Raditor...

I need to replace a failed thermostat in my living room. I have a simple electric boiler supplying hot water to underfloor heating - this is switched by an OJ Electronics WLM Master Underfloor Heating Controller (now discontinued). As well as the boiler, this controller also switches the pumps...

Hi Can anyone help me on this. I've just had a boiler plumbed in which will supply heat for underfloor heating downstairs and rads up - hot water is a separate deal. The UFH system came with a controller which can either fire up the boiler or open a motorised valve. I've plumbed in two...

Help! I know it's Christmas - and a Happy one to all - but my head's about to explode trying to work out a solution to my problem, viz: I want to run an underfloor heating system of 4 zones with a number of radiators in the upstairs rooms. At the moment I have a 9kW electric boiler (I...

Lunat Thanks for that. As I thought. I'll need to take the 40mm out through the wall and connect to the stack. Does this have to be above the 110mm branch or can I go in at the same point as long as it's not directly opposite? I have a swept tee with a 40mm boss at 90 degrees to the 110...

Hello all This is my first post on this forum so go easy on me....... I'm building (literally, on my own pretty much) a small 3 bed storey-and-a-half (i.e. room in the roof) traditional style house on the west coast of Scotland (I know, different regs. ) and am trying to sort out a way...