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[mantagte]

excuse my ignorance but i was never any good with maths or physics
if you have a click link
http://www.plumbnation.co.uk/site/amptec-c900-9kw-electric-flow-boiler/
rated at 9kw and your electricity rate is 31 pence per kw how much would it cost to have on three hours is it £2.79p or is that too simple an equation
will it cost less once the room is warm the room has a thermostat

[Kevin Wood]

Your maths is correct but leccy is not 31 pence per KWH. Nearer 10, I would say, although I haven't checked what I'm paying recently .

Also, it will only consume what your radiators can radiate as presumably it has a thermostat to limit the water temperature, as a boiler does. Once the house gets up to temperature the thermostat will reduce its' duty cycle further so calculating the actual costs is not straighforward. It will certainly be a good bit more expensive than fossil fuel. It has the added disadvantage that you can't use cheap rate electricity, of course.

Kevin

[mantagte]

cheers for that kevin
im with EON  31p kwh for the first 1000kw
the 14.65p kwh therafter
5.56p kwh night time
wish it was 10p kwh

[Kevin Wood]

I don't think you'll have much of a problem getting through the first 1000 kwh into the "cheap" rate.  

Your day rate is high because you've got economy 7, I guess.

Some form of storage would be the best electric option if you need economy 7. Failing that ditch it if you're going to be using electric heating in the peak hours.

Kevin

[mantagte]

never realised how expensive electric heating was til now
will have to investigate uswitch to see what my options are
may have to get gas instead

[Marks DTM Calib]

Gas is, at the minute, considerably cheaper than electric for heating unless you can run solely on economy 7......maybe a thermal store would be ideal?

[mantagte]

Gas is, at the minute, considerably cheaper than electric for heating unless you can run solely on economy 7......maybe a thermal store would be ideal?

a what?

[TheBoy]

Gas is, at the minute, considerably cheaper than electric for heating unless you can run solely on economy 7......maybe a thermal store would be ideal?

My mum, living out in the sticks, heats by leccy.  A rather great 3 phase leccy boiler (makes the streetlights dim at 2am when it kicks in).  A kinda overgrown storage heater in effect.

Her leccy bill is still cheaper than mine, and I don't even heat with electric  

[Marks DTM Calib]

A thermal store.....it works by heating a body of water upto a high temp.....your water and heating is then achieved by running heating coils through the body of water.

So effectively you have a heat store (hence thermal store) in the form of a large vessel a bit like a traditional hot water tank

I have often thought this would be the ideal to compliment solar heating

[Ken T]

Gas is, at the minute, considerably cheaper than electric for heating unless you can run solely on economy 7......maybe a thermal store would be ideal?

My mum, living out in the sticks, heats by leccy.  A rather great 3 phase leccy boiler (makes the streetlights dim at 2am when it kicks in).  A kinda overgrown storage heater in effect.

Her leccy bill is still cheaper than mine, and I don't even heat with electric  

Ah but you are, indirectly. All those PC's you are running are prob taking about 400W each, a lot of which is given off in heat.

Ken

[TheBoy]

Gas is, at the minute, considerably cheaper than electric for heating unless you can run solely on economy 7......maybe a thermal store would be ideal?

My mum, living out in the sticks, heats by leccy.  A rather great 3 phase leccy boiler (makes the streetlights dim at 2am when it kicks in).  A kinda overgrown storage heater in effect.

Her leccy bill is still cheaper than mine, and I don't even heat with electric  

Ah but you are, indirectly. All those PC's you are running are prob taking about 400W each, a lot of which is given off in heat.

Ken

you mean all those low power PCs pulling less than 200w each (inc monitor)

Except the quad core, thats about 250w