T4M versus T4R

[Chris Bailey]

Hi, I have used a T4M (directly wired, opentherm modulating) very succesfully with Opentherm on an Intergas combi. Just had to enable the Room Compensation parameter on the T4M.
I'm looking getting a T4R (wireless) for use with another Intergas combi install. Honeywell say it is Opentherm compatible but there is no info on the Opentherm parameters.
I phoned Honeywell tech support... they didnt know They said phone Intergas. And then Intergas said phone Honeywell
So... Can a T4R modulate the boiler flow temp via Opentherm?

[Richard]

T4R is an ErP Class V thermostat, so yes will modulate the flow temperature of compatible OpenTherm boilers...