# How many Gas units for the pilot flame?

Discussion in 'Plumbing and Central Heating' started by kapuka53, 18 Aug 2009.

1. ### kapuka53

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I have been away on holiday for just 05 days. I checked the gas meter & found that it has used 1.7 gas units for 05 days for the pilot flame on my back boiler (I had both HW & CH off).

Does anyone know?

Sorry if it is a silly question. many thanks in advance.

K

3. ### D_Hailsham

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What do you mean by a gas unit?

4. ### kapuka53

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1.7 Units on the meter. I cant remember the unit type stated on the meter, sorry.

5. ### doitall

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Someone worked it out, that the pilot could cost £30.00 a year.

6. ### D_Hailsham

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That's unfortunate.

Some meters measure consumption in cubic metres; others in hundreds of cubic feet. There are 2.83 cubic metres in a hundred cubic feet.

So you have used either 1.7 cubic metres or 4.81 cubic metres. That's either 18.5kWh or 52.4kWh.

7. ### namsag

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Back in the old days of 38p a therm it was £10 a year don`t` know what it is now as to be honest have not got a clue how much gas is now.

Thing is it is not completly wasted energy as it does keep a bit off heat in system.

8. ### D_Hailsham

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The formula used to calculate the Sedbuk rating of a boiler reduces the efficiency of a boiler by 4% if it has a pilot light.

9. ### Agile

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Its about £30-£40 per annum but that is not totally wasted while heating the CH or HW.

Tony

11. ### mickyg

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surely it depends on the pilot? If its £30 on a normal boiler, whats it on a wau?
There always quite high for eyebrow protection

12. ### kapuka53

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Hi,
Sorry for the delayed reply D_Hailsham.

It's cubic metres.

So my question is 1.7 cubic metres of Gas over 03 days for a pilot light, does it sound OK?

Do you all know?

Thanks
K

13. ### D_Hailsham

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1.7cu.m is approx 18 kWh. Over 3 days (72 hours) that is equivalent to running a 250w light continuously, which does not sound right. Are you sure you read the meter correctly?

There are four black numbers and two red numbers (one may be a dial). The right hand black number is the units, i.e:
765432 = 7,654.32 cubic metres.

14. ### doitall

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It was 5 days when the original question was posted.

15. ### bengasman

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Could be of course that it was 1.7 cubic foot, which is really not worth talking about.
If you would have an open flue boiler, the amount of heat lost by the continuous draft coming in from the vent and out through the chimney would cost a lot more.

16. ### D_Hailsham

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The OP says it is a metric meter.

17. ### bengasman

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Guess I missed that one

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