Hi,
Currently have a Potterton Suprima HE 60 boiler, with a Honeywell ST6400C controller, and analog room stat.
It's a S-Plan system with 2xHoneywell v4043h1056 two way valves.
Wanting to move the thermostat into the lounge, so looking to get a Honeywell CMT927 for CH timer and...