On 01/07/2019 10:21, dennis@home wrote:
On 01/07/2019 08:43, Farmer Giles wrote:

it has to be left on all the time. Well, not sure
about 'has to be' but they say it's better to.

They probably leave the CH on all the time because its cheaper than
heating it up again!

The problem as I understand it is the length of time they take to warm
up (many hours).

So if it wasn't left on you wouldn't be having an impromptu dip.