Are there any high flow TRV valve bases that would be sufficient for
about 2.1kW at delta-T=30K (so flow = 50-something) which is what the
unit can put out on max fan speed?


Got the plumbers coming to slap in CH in 2 weeks.

The conservatory is getting a Myson LoLine RC 14-10
http://www.myson.co.uk/products/lo_line_rc.htm#tab-2

fan convector for fast heatup. I'm tossing up between radio (ZWave) rad
valve or full zone valve.


A zone valve is harder to setup as I'd need to actually wire it in - but
we can fall back to this later if necessary. So I'd like to give a rad
valve a try first - but it would be sensible to look for a valve that
would suit a big radiator (to be fair I have a few rads with 2kW outputs
too)

Valve needs to have a Danfoss RA head fitting OR a Drayton screw thread
(radio head has adaptors for both).

Cheers

Tim