Worcester Bosch Greenstar 4000 System GR4700iW 12 S NG system 12kw


I am planning on purchasing a new system boiler, Worcester Bosch Greenstar 4000 series 12kW its got some very good green features of being able to modulates down to 1.9kW central heating output. I also plan to have a 250L unvented tank.


The Worcester Bosch controls are able to modulate and control the boiler well, Will the Tado product be able to modulate the boiler? I know Tado have had a few changes and removed features like opentherm from UK products but I want to know about opentherm support for system boilers with s-plan etc from my understand Tado doesn't support modulation on system boilers?

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