High gas usage for boiler.

[Chuck]

185kwh x 365 days is 67525kwh. Is that a normal Amount? Maybe I have unrealistic views? Id checked online and it seemed to suggest around 10-15000 was average to high for a 4 bed house.

My annual gas consumption is 26,000 kW hr (twice the national average), which is for a relatively poorly insulated five bed + three reception rooms house, most of which has to be kept at 21°C 24/7 because a family member is infirm and has to be kept warm.

 

[ShaunCorbs]

Nope sorry to say no smoking gun

 

[stevedurban]

My annual gas consumption is 26,000 kW hr (twice the national average), which is for a relatively poorly insulated five bed + three reception rooms house, most of which has to be kept at 21°C 24/7 because a family member is infirm and has to be kept warm.

So I would say we’re probably similar in setup. 5 bed 3 reception room (open plan) and always at 21

Im not sure if the house would be classed as poorly insulated though? Has full cavity wall insulation - had a loft conversion done to regs with double layer of super foil over the whole thing.

The only part that needs attention is the front door a currently wood - that’s being replaced next week!

But pretty much all of that has been the same for the past 10 years! And only the last 2 has seen the increase.

 

[ShaunCorbs]

I know it might sound weird but is / does it have cavity wall as a few new builds have been reported as having hollow spots etc

 

[stevedurban]

I know it might sound weird but is / does it have cavity wall as a few new builds have been reported as having hollow spots etc

It’s an older house - 1960’s and had insualtion blown in about 10 years ago before we moved in.

 

[John.g]

Would you mind just recapping briefly
What exactly has changed apart from energy consumption in the past few years re your control system.

 

[stevedurban]

Would you mind just recapping briefly
What exactly has changed apart from energy consumption in the past few years re your control system.

The only thing I can remember being changed was the meter. I don’t remember the change in the bills happening straight away though. The smart meter always used to show £3-4 a day total for gas and electricity.

Tado has always been in since we moved in. I added digital TRV’s after the issue to try and help.

 

[John.g]

The meter seemed to check out OK from all our calculations, I still think the key to the answer might be hidden somewhere here IF CH usage can be reasonably ruled out?

Somethings not adding up now anyway Steve. (maybe good)
You used 1257kwh of gas, apparently for HW heating. This equates to 43.4kwh/day for that 29day billing period. This equals to 36.9kwh/day at a boiler efficiency of 85%.
Assuming cold water at 12C heated to 60C, Litres of hot water = 36.9*860/(60-12), 661Litres.
This would equate to 1133 LPD at 40C.
Your actual water usage for both May and June was 460LPD for each month so ????.

Don't know how they came up with a estimated gas usage of 60550kwh/annum

 

[stevedurban]

The meter seemed to check out OK from all our calculations, I still think the key to the answer might be hidden somewhere here IF CH usage can be reasonably ruled out?

I thought hot water has been ruled now out on the basis it’s now only one 2 hours a day?

 

[John.g]

That's why I posted this again, its pretty obvious that DHW usage couldn't account for the difference and as I said IF CH can reasonably be ruled out then ???. If one assumed DHW @ 200 litres/day at 60C = 12kwh so 31kwh unaccounted for. I still have a suspicion that the boiler was enabled and firing on its own stat which wouldn't take long to dissipate that 31kwh especially if that ABV was/is passing.