Gas meter readings ft3 and m3

cmupnorth

Hi

I'm looking at changing my tariff and have been browsing my last bill.
At present they have calculated my meter reading in cubic metres when my gas meter is actually measured in ft3.
Example: Gas usage - 126 (cubic metres) with a calorific value of 39.5 is worked out as 1414 KWH. Anyone get any info this?
Many Thanks

dogshome

Hmmm - On an Imperial ft3 meter where each unit delivers 100 cubic feet of gas, the Bill by a quite complex equation then adjusts it to cubic metres, and converts that to chargeable Kwh
And just to make life difficult, each bills Kwh conversion.is slightly different according to the calorific quality of the gas.
I puzzle over the 39.5 Calorific Quality on your bill, as I've seen a lot of Gas bills in my time and have never seen anythig higher than 32.1 - If you haven't made a typo it would be worth querying ths figure with your supplier.

The quick check is to look at the bill and divide the Units used on the meter, into the Kwh charged
If the answer is close to 31.5 you are being charged for an Imperial meter
If the answer is close to 11.2 you are being charged for a Metric meter

It's very bad financial news if you are being charged on the basis of a Metric meter, when it's actually Imperial

Cardew

A gas unit on an Imperial Meter(i.e. yours) is 100 cubic feet. They divide this by 2.83 in the calculation to bring it down to cubic meters.

So this means that if you have used 126 gas units(of 100 cubic feet) on your meter, you have used approx 4000kWh.

molerat

dogshome wrote: »

I puzzle over the 39.5 Calorific Quality on your bill, as I've seen a lot of Gas bills in my time and have never seen anythig higher than 32.1 -

My bill this week was at 40.0
From http://www.nationalgrid.com/uk/Gas/Data/misc/reports/description/

Gas passing through the National Grid pipeline system has a CV of 37.5 MJ/m3 to 43.0 MJ/m3, with the exception of Stornoway which receives liquid petroleum gas.