howard firstname.lastname@example.org (Stacey Higginbotham) writes:
It's probably a question of how much of the heat it produces
goes into heating the food, verses how much goes into heating
the kitchen, and how much is wasted in heating the internal
metalwork and then lost when the oven is switched off.
This latter part might effect how long it takes to heat up
and therefore how long in advance you need to switch it on.
Mine, which is probably about 5 years old, takes about 5
minutes to get to max temperature, whereas one I recall my
parents having one some 20 years ago of about the same power
rating took probably over half an our to get to max temperature.
That would result in vastly different energy consumption if you
wanted to, say, cook a pizza for 10 mintues in a hot oven.
I've no idea which aspects of the efficiency the letters you've
seen refer to though.
email@example.com (Andrew Gabriel) wrote in message
Thanks for the replies! I've not got a newsreader, so I've got to post
through Google so I only get one shot per day at this...
I see what's going on now: The oven that is rated A/B has a main oven
capacity of 47 (A rating) and a secondary oven of 35 (B Rating). The
C/C oven has a 65/32 split. To a layman like myself this seems
ridiculous - the energy efficiency ratings don't seem to be done on
energy efficiency at all, the 32 litre oven will, 99% of the time, be
using less energy than the 35 litre one yet it gets a worse rating! If
the ratings start becoming more widely used it will mean that the
manufacturers just have to fiddle their ovens round the size
limitations (ie increase the capacity by 3 litres in the secondary
oven and 1(!) litre in the main oven and bingo - you've created an A/A
rated oven - that is less energy efficient than it used to be!
Thanks again for the replies.
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