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The "Wall/air" stat and "Pipe" stat contistute double protection in order to conform to Part L building regulations and MUST be wired in series from a permenant live and must override time controls in the event of freezing. This means that BOTH stats must call for a demand before the boiler...

With all due respect, this is not the case these days. The old style universal compensators were complicated and unfortunately creates this sigma that continues to today. A little like the old opinions of condensing boilers and solar hot water. Companies now days go to great lengths to make them...

There are many various options you could go for but the manufacturers own controller will always do the best job as they are designed to communicate better with your boiler. It's a little like buying a "universal" remote for your TV. It'll do the job, but not as good as the proper one. On the...