My Combi boiler (Worcester Greenstar 37CDi) is located in the attic, my CH programmer (an ancient Honeywell model) is in the ex-airing-cupboard and the CH thermostat is in the downstairs hall. I'd like to have internet control as my work hours are irregular.
I've looked at the Heatmiser PRT-TS WiFi as a replacement controller but it looks like that includes the thermostat so would need to be located in the downstairs hall, however the wiring for that is just a 3-core 240V cable (Earth, Live and switched-Live) and it would be a real pain to get a 4-core cable to include neutral to power the unit and probably breaks some building reg if I leave out earth.
Am I reading it correct? or when they talk about 3-cable connection to boiler does it mean I can just rip out the programmer in the ex-airing-cupboard and use a mains junction box to continue the run down to the thermostat and put the Heatmiser downstairs?
Looking at the cost of the Heatmiser at around £120, then if I need to pay for any extra bits which could cost £40+, it starts to get to the point where it would be easier to pay BG £199 for Hive and then I can sit back and let their engineer do all the work for me.
Can I do what I need with just the Heatmiser, if not can anyone suggest a cheap source for the other parts, or should I just pay BG to do it for me?
I've looked at the Heatmiser PRT-TS WiFi as a replacement controller but it looks like that includes the thermostat so would need to be located in the downstairs hall, however the wiring for that is just a 3-core 240V cable (Earth, Live and switched-Live) and it would be a real pain to get a 4-core cable to include neutral to power the unit and probably breaks some building reg if I leave out earth.
Am I reading it correct? or when they talk about 3-cable connection to boiler does it mean I can just rip out the programmer in the ex-airing-cupboard and use a mains junction box to continue the run down to the thermostat and put the Heatmiser downstairs?
Looking at the cost of the Heatmiser at around £120, then if I need to pay for any extra bits which could cost £40+, it starts to get to the point where it would be easier to pay BG £199 for Hive and then I can sit back and let their engineer do all the work for me.
Can I do what I need with just the Heatmiser, if not can anyone suggest a cheap source for the other parts, or should I just pay BG to do it for me?