On Sat, 28 Nov 2020 15:20:39 GMT, Pamela
wrote:

snip

I've measured the overnight consumption of the electric heater,
and it's just under 1KWh at the moment which seems quite
reasonable to me.

Are you sure because 1 kWh seems very little for heating a room
overnight. It equates to a "one bar" fire left on for an hour which
wouldn't heat my room much.

We only have a 1kW oil filled rad in this lounge atm, the current
temperature is 23 DegC and the heater is off most of the time?

Before we were testing the (3,2,1KW in 1KW mode) upright oil filled
rad the 600W long, low slim one also worked perfectly.

Perhaps that room needs only the slightest amount of additional
heating

Victorian cottage here with solid 9" brick walls so not very good
thermally but the oil filled rad in the bedroom (with few other heat
sources, like TV's and computers) can be held at 'comfortable quite
easily as well.

Cheers, T i m