Anyone know how much leccie a convection microwave uses?
Discussion
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.
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.
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.
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.
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.
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.
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).
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).
vescaegg said:
According to my little British gas smart meter, about £1 an hour! 
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
ctdctd said:
vescaegg said:
According to my little British gas smart meter, about £1 an hour!
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
fair enough, not a very 'smart' meter then!Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff