alan_m wrote:

On 23/10/2019 14:24, T i m wrote:

Ignoring the binary / analogue action, what is the (functional /
thermal control) differences between a thermostatic rad valve and a
room stat / room? And we are only talking about the ability to manage
the temperature in the room, nothing else / irreverent thanks.

This should be funny ...

On a cold frosty morning and the TRV is fully open it cannot tell the
boiler and the pump to switch on to provide heat. The room remains cold.

On a cold frosty morning and the temperature is low a room thermostat
can tell the boiler and the pump to switch on.

That is to assume that there is any point in the boiler being off in the
heating season.

--

Roger Hayter