Gas Formula

notahappybunny_2

Just received my gas bill from Eon.
On checking it carefully, I notice that the calorific value used when
converting the units to kilowatt hours is a different amount to my last bill!
How can this be.

Have just checked my bills from last year and this calorific value was different for each bill - sometimes 39.1 sometimes 39.2 and also 39.3.
Why does this figure change if it's a formula?

Can anyone enlighten me please - it makes quite a difference to the bill.

Apparently all gas suppliers use this formula but why does it vary?

savemoney

I asked thsi question a while back. Its seems there is a tolerance that allows it to change. My bill does exactly same changes almost monthly

stewie_griffin

Calorific value isn't a constant which is one of the reasons that the calculation is needed in the first place. See the link below for more information

http://www.nationalgrid.com/ui/Sites/NationalGrid/UK/Templates/FeaturePage.aspx?NRMODE=Published&NRNODEGUID={13F1227E-E0C6-4BD8-9C15-D67D971975CB}&NRORIGINALURL=%2Fuk%2FGas%2FData%2Fmisc%2Freports%2Fdescription%2F&NRCACHEHINT=Guest

Gman0365

Its chnages as the composition of the gas changes. It fluctuates at different times of the year and in different parts of the country. It's typically always around the 38/39 MJ/m3 figure.

More info can be found here: http://www.nationalgrid.com/NR/exeres/32E65ED1-1FB7-4CF9-BAEB-EB8BDB7774C5.htm

Cardew

notahappybunny wrote: »

Have just checked my bills from last year and this calorific value was different for each bill - sometimes 39.1 sometimes 39.2 and also 39.3.
Why does this figure change if it's a formula?

Can anyone enlighten me please - it makes quite a difference to the bill.

Apparently all gas suppliers use this formula but why does it vary?

Explanations are above, but surely it hardly makes much difference to the bill.

For instance take a slightly above average quarterly bill of 500 metric gas units.

With a calorific value of 39.1 it equates to 5553.5 kWh

With a calorific value of 39.2 it equates to 5567.7 kWh a difference of 00.2% or 40pence

MikeR71

I had a similar problem with EON. I did some searching and found that they are extortionately expensive compared to a few other companies. So I switched and my bill has been reduced greatly.

EON are on my blacklist.

KimYeovil

The fact that it varies is the reason why the whole formula has to be spelt out in the first place - if it didn't they could avoid lots of (apparent) complication through just quoting a single final conversion constant.

And, MikeR, E-on's cheapest tariffs are not 'extortionate' compared to other companies. Indeed their Save Online 5 tariff is the cheapest for average consumption in many regions. Don't post such bilge.

MikeR71

Kim, each one of us here can only report his/her experiences.
All I did was report mine. That's all.