posted on another thread when I should really have started a new one so here goes.
An ECO4 installer has fitted Honeywell (OpenTherm) controls to a Valliant Open Vent Boiler with remote Cylinder. Based on room size and radiator size calculators I believe the radiatiors have been specced to...
The drivers behind my research is a Vaillant open vent boiler has been fitted under EC04, (PASS 2035 demands smart controls and a fully integrated systems) but they have fitted Openthem controls.
I am trying to get them to swap out the Opentherm controls for Valliant eBUS but its hard going...
I have spent ages trying to understand Vaillant controls and havent made much progress - Vaillant VR921 sesnoNET internet gateway as an alternative to a VR92. ?