Bob Mannix wrote:
"Tracy" wrote in message
. uk...
"John Stumbles" wrote in message
news
On Thu, 19 Apr 2007 09:50:45 +0000, Tracy wrote:

.I assume you mean 22kw hours i.e. the equivalent of 22kw for one hour
each day. where did I say that?

It is perfectly clear that I mean I used 22.88039 KW of gas in a day. That
is what I said.

use approx 22KW of gas per day or to make it easier I used 2 cubic
meters of gas but the gas company converts it to KW and charges that way.

No, it converts it to kWh (kilowatt hours) as the other poster said. kW is a
*power* unit (ie when on at full tilt you boiler is running at xkW, if you
leave it running like that for 2 hours you have used 2xkWh of energy). If
you use a certain amount of power for a certain time, you can calculate the
energy used, which is what you are charged for. As the other post (quite
correctly) said, an energy consumption of 22kWh over one day is equivalent
to a usage of just under 1kW per hour continuously OR, using 22kW for one
hour.
All I want to know is if that is the quantity of gas in cubic meters or
kilowatts that other people use with a similar set up to mine.

He was trying to help you by estimating what such a usage could be caused by
(more or less correctly as far as I could see). He also probably felt that
misunderstanding the usage units led to more confusion and was trying to
lessen such confusion.

22kWh is therefore perhaps a bit high, as (as he says) a standard combi will
run at about 22kW if it was flat out (say heating and running a shower). No,
you don't have a combi but the same amount of energy would be required to
replace the hot water you use. Less actually, as you'll use more water in
the power shower. Assuming the meter is correct, the only real ways to save
gas a

Have showers not baths and make them short if a power shower
Turn down the heating thermostat
Make sure the hot water tank is lagged
Fit thermostatic valves to radiators and make bedrooms/little used rooms
colder.


Well my boiler is rated at about 15KW and it refills a 250liter tank
pretty quickly in terms of hot water.

We PROBABLY (2 of us) use a bit less than that in a day.


Assuming a 50C rise, (10C-60c) it takes 1.25 megacalories to heat that
tank.

That's about 14KWh

With a boiler efficiency of say 70% that is about 21KWh.

So what is being said (if we are correct that he means 22KWh is that he
is probably using around a tankful (250l) of hot water a day

My wife can do that just by leaving the hot tap running in the sink, or
a large shower and a bath for me.

Plus things like dishwashers and washing machines MAY be using it as well.

I would say its about par for a family of three or four, and a bit high
for two.. Heck its only around £2.20 a day. Less if econo 7 is used ,
and about what? 60-70p a day for gas?

Short answer is don't wash.