4kw gas fire cost to run?

[worcesterman47]

Hi guys this may(or may not) be a stupid question...I have a 4kw gas fire (88% efficient) and glass front...I pay currently just under 6p per kilowatt per hour..so if I were to have the fire on for say 5hrs @ 4kw per hour that roughly works out to approx cost of £1.20p for gas used...BUT is that what my supplier will be charging me ?( not including standing charge & VAT)..or is it worked out by my supplier a different way costing me actually more per Kwh ? Thanks

 

[cross thread]

Correct if it’s 4 kw input

 

[worcesterman47]

Thank you for your reply...so then in a nutshell if I were to use 200Kwh of gas exactly over 1 month my total Gas Bill from my supplier would be @ 6p per Kwh = £12.00 ( Not including Standing Charge or VAT)?

 

[RandomGrinch]

£1.20p for gas used

£1.36, allowing for the 88% efficiency.
The 4kW refers to the heaters output power.

 

[JohnD]

4kW is quite a lot.

More likely it will be used way below max most of the time.