On Aug 14, 2012, at 1:09 AM, Karl Wolz <wolzphoto@Q.COM> wrote:

Don't know about more efficient, but I've been told chest type freezers are
better because all the cold doesn't spill out when you open the door and
stand there making up your mind what you want.

That's the efficiency ... doesn't take as much energy to recharge the cold
environment inside because not as much is lost due to use/opening.
Opening the door of a front loading fridge, spills ALL the warmer and
cold air out that front doorway. Top loaders "dump" the rising, warmer air out
the top, while the colder air sits more stable at the bottom of the case.

bob