>A fridge that takes only 0.1 kWh a day

The author states that when you open the door on a vertical refrigerator, 
you lose all the cold air.

And my question is, what is the significance of this volume of air?  It 
seems that the heat content of air is quite a bit lower than the heat 
content of the objects inside.  Anybody want to do an estimation on how 
much heat energy this is?  Maybe as a fraction compared to the 
contents.  I've been suspicious about this one for years.   A manual once 
stated that the fridge would work more efficiently if you kept it full of 
stuff.  That got me thinking.

Barry

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