Working out average annual and hourly and gas consumption for a property

[Matt0029]

Hi, can anyone help me work out the average annual and hourly gas consumption for a property, in this case a bungalow. With a 24kw boiler and 7.9kw gas hob. I know how to work out the hourly gas consumption with the appliances on max. But not in the scenario above. Thanks for any help.

 

[Matt0029]

I can't find a formula for an average gas consumption. I'd presume there'd be too many variables. Anyone been asked for this before?