Peak hourly load rates

[Psbjj1]

Hi all, I have a customer who has 2x 37kw boilers and a 7kw hob.

These are supplied from a u6 meter and a 25 metre pipe run in 22mm.

I've told him he needs to upgrade both meter and pipe run. His energy supplier have come back asking for peak hourly load.

Is this a case of adding gas rates or do I need to take into account CV and diversity factors?

All help appreciated. Can't find my viper book for the life of me so I've ordered a corgi one for the meantime.

 

[Aire]

Isn't any installation exceeding 70kw classed as commercial? Are you registered for commercial gas?

 

[Riley]

25 m of pipe for that you have pretty much zero chance of it being in scope. You could obviously work on each boiler individually but without being able to work on the whole caboodle it’s a bit of a waste of time

 

[ShaunCorbs]

i would say around 9m3/h so u16 meter also commercial and under gassed atm hope youve turned them off

 

[king of pipes]

As above a u6 will only pass enough gas for 60kw so a u16 is needed the pipework will need upgrading something you cannot do on a domestic ticket. You should be turning one of those boilers off and go as far as capping the gas to it and attaching a warning notice and complete the relevant paperwork . Kop

 

[firemant]

Isn't any installation exceeding 70kw classed as commercial? Are you registered for commercial gas?

Hi all, I have a customer who has 2x 37kw boilers and a 7kw hob.

These are supplied from a u6 meter and a 25 metre pipe run in 22mm.

I've told him he needs to upgrade both meter and pipe run. His energy supplier have come back asking for peak hourly load.

Is this a case of adding gas rates or do I need to take into account CV and diversity factors?

All help appreciated. Can't find my viper book for the life of me so I've ordered a corgi one for the meantime.

Good point, Craig. But there is no way it is actually consuming 70Kw

 

[bill577]

Really depends on what the boilers are, if they are combis the diversity factor would bring them and the hob back into domestic territory.

 

[robdog6000]

It sounds hugely under-gassed. I would be concerned about the hob going out with both boilers firing.

The commercial/domestic registration thing needs some clarification. I have heard so many differing opinions of the regs. Can anyone enlighten me?

 

[Aire]

It sounds hugely under-gassed. I would be concerned about the hob going out with both boilers firing.

The commercial/domestic registration thing needs some clarification. I have heard so many differing opinions of the regs. Can anyone enlighten me?

The points I remember are
1.Any installation over 70kw is classed as commercial.
2.Any installation where the installation pipe work is greater than 35mm
3.If the total gas volume of the installation goes over a certain amount (can't remember the figure)
4.Any gas meter bigger than a u16
5.And I also think if commercial appliances are used,

 

[robdog6000]

Thanks Craig. Its the 70kw cut-off limit which I wasn't sure of. Does that mean that you can't work on any pipework on a system over 70 kw?

I thought a lot of the regs are based on purge volumes rather then the load of the system.