OTGW to monitor Rehau UFH System

[Rincewind]

Hello, looking for some advice pls on monitoring my home UFH system pls.

1st question is, does anyone know if Rehau (OJ Electronics hardware I think) uses OpenTherm protocol?!

If so, I see the gateway looks like it sits between the thermostat and the boiler, but is it possible to use it to read all the messages for an UFH manifold controller with multiple room thermostats on up to 8 channels?

Was planning on creating a dashboard of total times each room thermostat is calling for heat to spot problems early like failed zone actuators, or rooms using excessive boiler ON time to heat due to bad insulation/drafts etc.

Appreciate any help thanks!

[Rincewind]

Anyone?!