On 09/10/2020 12:53, Dave Liquorice wrote:
On 9 Oct 2020 08:15:26 GMT, Roger Hayter wrote:

I am sure your boiler has a way of switching off on demand water
heating, which would save a few quid over a year by stopping short
cycling to keep the water heat exchanger hot if you don't mind not
having hot water immediately available at some hours,

It's a combi, *hours* to heat it's internal heat exchanger or even
built in small buffer store? A decent gas boiler ought to be able to
reheat a whole hot water cylinder in an less than an hour.

When I had a 2 bed flat the HW cylinder would reheat in 20 mins. When
the time switch died, I didn't bother replacing it, just switched the
water on when I needed it. Heating was on a room thermostat and
manual on/off switch. BIG drop in gas bill...

I calculate that at best I spend less than £100 a year heating water for
washing

Compared with £2000 for central heating.

You must have lived in a rabbit hutch to have had your CH bills that
low, that reducing the minimal losses through a hot water tank saved you
anything at all...

I can hear the boiler fire up after I have had a shower. For about 10
minutes. To get the house up to temperature on a cold morning make that
thee hours, and on a really cold morning its more like all morning -
then I switch to 'permanently on', for the CH.

People Who Do Sums can easily prove to themselves how much the heat loss
is from a small lagged tank even at 60°C, which if it is inside the
house is only keeping the house warm, compared with the heat loss from
four walls a roof and a floor in a detached house...
....During my divorce I stayed with a friend who should have known
better, who insisted the kettle never be filled to more than the amount
required for the hot drink.

I spent some time on the calculator and handed him over 50p 'that should
make it up for the next three months'

Even People Who *Can* Do Sums are often too lazy or stupid to *do* them.



--
The theory of Communism may be summed up in one sentence: Abolish all
private property.

Karl Marx