How much electricity does an immersion heater use in the UK?

Dear paddy1929-ga,

The standard Immersion Heater requires 3 kilowatts, or put another
way, 1 hour?s use for 3 units of electricity. You can also get 1kw and
2kw heaters.

To calculate the cost of running the appliance you can use this formula:

"Cost of Running Appliances: Electrical appliances use up energy which
is measured in units. A unit of electricity is a kilowatt-hour (kwh).
You can work out how much it costs to run something by looking at its
wattage plate. This tells you its power in watts or kilowatts. A
kilowatt is a thousand watts. To work out how many units of
electricity you have used, multiply the wattage of the appliance by
the number of hours used.
Power (Kilowatts) x Time (hours) = Energy used (Kilowatt hours)"

"a 3kw immersion heater used on the normal tariff and left on, for 10
hours costs 30 x 6.Op = £1.80p. But you can reduce it if your tank is
well lagged and the water is heated up at night on the cheap rate.
Don't use an immersion heater for more than you need - it's
expensive."
http://www.consumereducation.org.uk/environment/english/energy/03.htm

This site has a guide as to how much electricity is used by various
electrical items in the home.
http://www.npower.com/yourhome/green/homeenergyguide/

Additional source of information
http://www.readersdigest.co.uk/diy/webpages/339.htm

I hope this answers your question. If it does not, or the answer is
unclear, then please ask for clarification of this research before
rating the answer. I shall respond to the clarification request as
soon as I receive it.
Thank you
answerfinder

"immersion heater" consumption
://www.google.com/search?q=%22immersion+heater%22+consumption&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=0&sa=N

Really helpful, wwith good links to further info.