"Rod Speed" > wrote in message
...
> dennis@home wrote
>> Rod Speed > wrote
>>> dennis@home wrote
>>>> Rod Speed > wrote
>>>>> dennis@home wrote:
>>>>>> Rod Speed > wrote
>
>>>>>>>> After seeing the upright models it occurred to me that when
>>>>>>>> a check freezer is full, it's really full because all the crap
>>>>>>>> is a big pile, while a full upright will still have air because
>>>>>>>> the contents are unlikely exactly match the shelf spacing.
>
>>>>>>> Yes, but that air makes no difference to the effeciency of the
>>>>>>> freezer.
>
>>>>>> It does when you open the door, that free air leaks out and is
>>>>>> replaced by nice warm moist air that has to be cooled.
>
>>>>> In practice thats a trivial effect because the specific gravity of the
>>>>> air is so low.
>
>>>> Its that low that it ices up your freezer.
>
>>> Nope, that mostly comes from what is in the freezer and happens in chest
>>> freezers anyway.
>
>> It happens faster in uprights.
>
> Not with the frost free ones it doesnt.

So what, they still use more energy to removing the water vapour that comes
in with the air.

>
>> If it came from the contents they would all suffer from freezer burn big
>> time and freezers would be useless for storing food.
>
> Wrong, as always.
>

Don't say stupid things, it is a statement of fact, if the ice comes from
the food then they dehydrate, this is freezer burn.