Sooooooo, a reefer operating at temperatures below the desired temperature of the regular compartment and above the desired temperature of the freezer compartment will not lower the freezer compartment to freezing temperatures. Not a problem if you use a separate freezer. Overall you'll save energy even running both a reefer and freezer when the temperatures don't require the refrigerator to run.
There might be a problem with the stuff in the reefer freezing if the ambient temperature stays low for an extended period of time. Some stuff doesn't survive freezing well so you might ruin a fair amount of food and therefore spend more money on food.
Each time you go out of your interior house to your exterior house to get a beer (assuming you drink beer) you'll be letting cold air into your heated space and it will cost you more in heating costs.
Seems to me it's not worth the effort to save about three bucks a month:http://www.glendalewaterandpower.com/ra ... costs.aspx
Trying it isn't an option here. The lowest my home has ever gotten w/o heat for extended periods is about 50f.
I'd focus my cost cutting efforts where there would be more of a payback.
Hope this helps.
The opinions in this post are my own. My comments are directed to those that might like an alternative approach to those already espoused.There is the right way,the wrong way,the USMC way, your way, my way, and the highway.
"I'm impatient with stupidity. My people have learned to live without it." Klaatu-"The Day the Earth Stood Still"
"You can't handle the truth!"-Jack Nicholson "A Few Good Men"
"Some people spend an entire lifetime wondering if they made a difference in the world. The Marines don't have that problem"-Ronald Reagan