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Shuvi McTupya

Original Poster:

17,856 posts

132 months

[news] 
Friday 3rd August 2012 quote quote all
Compared to a regular fan assisted oven?

The reason i am asking is that my mother refuses to use her fan assisted oven because she thinks her microwave oven (in convection mode) is cheaper to run..

I am not so sure as she has to run the convection oven at a higher temperature and for nearly twice as long to get the same results as her fan assisted oven.

Is this what my friday nights have come to?

Somebody please kill me.


bungle.

51 posts

73 months

[news] 
Friday 3rd August 2012 quote quote all
There will be a sticker on the back with a Kw rating on it.

Skodasupercar

655 posts

62 months

[news] 
Friday 3rd August 2012 quote quote all
In convection mode, I assume the microwave uses an electrical resistance heating element.

If so they are both the same 'efficiency' i.e. both use eletric resistance heating which is 100% efficient, i.e. all the energy you put in gets turned to heat. The overall system efficiency will be dependant on the size of the heated space and the heat loss (i.e. insulation and air tightness).

I suspect that there would be little in it, in the real world.

TBSC

61 posts

48 months

[news] 
Friday 3rd August 2012 quote quote all
Yes. what exciting Friday nights we have.
Both are probably about 2kw. The Fan oven will heat up more quickly and cook slightly faster and at a lower temp. If you look on the cooking instructions on most food wraping it will normally have different cooking temps. and times for conventional and fan ovens.

Simpo Two

59,559 posts

150 months

[news] 
Friday 3rd August 2012 quote quote all
How about switching each one on in turn and seeing how fast the meter clocks up in a given time?

I'd expect the microwave version to use less power as there's no heating up time and the power is heating the water molecules in the food, not the air.


Ah - I assumed she was using microwave PLUS convection. That would be best surely. I think she feels that the microave over per se is more efficient (regardless of heating nethod).
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Shuvi McTupya

Original Poster:

17,856 posts

132 months

[news] 
Friday 3rd August 2012 quote quote all
Both units are built in so i can't really get to the back of them to check ratings..

I might do the meter thing one day, it is pissing me off having to wait twice as long for my dinner as i think i should hehe

And besides, the fan oven cooks a better pizza..


vescaegg

3,467 posts

52 months

[news] 
Saturday 4th August 2012 quote quote all
According to my little British gas smart meter, about £1 an hour! yikes

ctdctd

138 posts

83 months

[news] 
Saturday 4th August 2012 quote quote all
vescaegg said:
According to my little British gas smart meter, about £1 an hour! yikes
Then your smart meter may not be very smart or you have an industrial sized oven!

Fan ovens are normaly 2KW rated and I guess microwaves on convection mode are between 1KW and 2KW.

So you would use at most 2 units of 'leccy in one hour. Probably less as the oven cycles on and off when it reaches temperature.

So, if your 'leccy costs 15p a unit, the most it can cost per hour is 30p.

HTH

Shuvi McTupya

Original Poster:

17,856 posts

132 months

[news] 
Saturday 4th August 2012 quote quote all
vescaegg said:
According to my little British gas smart meter, about £1 an hour! yikes
Do you have a fan assisted oven to compare it too?



vescaegg

3,467 posts

52 months

[news] 
Saturday 4th August 2012 quote quote all
ctdctd said:
vescaegg said:
According to my little British gas smart meter, about £1 an hour! yikes
Then your smart meter may not be very smart or you have an industrial sized oven!

Fan ovens are normaly 2KW rated and I guess microwaves on convection mode are between 1KW and 2KW.

So you would use at most 2 units of 'leccy in one hour. Probably less as the oven cycles on and off when it reaches temperature.

So, if your 'leccy costs 15p a unit, the most it can cost per hour is 30p.

HTH
hehe fair enough, not a very 'smart' meter then!

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