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Hi All, I need some advise on which option to choose during a guided setup please. System details: Home Install No HR92’s (yet) S-Plan with two Honeywell control valves for CH and HW Unvented pressurised hot water tank Worcester boiler I've based the instructions on those found here, except...

My current CH setup is a pressured sealed-system with a hot water tank and Worcester boiler. It has a Honeywell ST9400C programmer and a wireless Honeywell thermostat. Unfortunately the programmer is starting to fail (it keeps powercycling) so I'm looking to install the new Hive instead. This...