On Sat, 26 Oct 2019 09:18:09 +0100, "dennis@home"
wrote:

On 25/10/2019 23:14, T i m wrote:
On Fri, 25 Oct 2019 09:17:52 +0100, 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.

Nope, because as soon as the timer calls for central heating the
boiler and pump are turned on?

Then the water in the pipes/bypass gets hot the boiler switches off,
then the pipes/bypass cool down and the boiler switches on.

Yup.

Repeat wasting fuel and wearing the system out.

So, they aren't asking you to pay for it and it's been pretty trouble
free for 40+ years so ... ?

Do this on warm days when no heat is needed too.

Except the chances are the duty cycle will be very long and hot water
is needed on warm days in any case.

Cheers, T i m