From consumer reports
Actually NO cold air is transferred to the refrigerator side from the freezer. It would be too hard to regulate.
But your idea of cold ?sinks? is true. That is why the bottom freezer is slightly more efficient. When you open it, the ?cold? does not pour on the floor; it just stays in the drawer. So, there is less ?substituted? air to be re-cooled and dehumidified.
The only drawback is that these refrigerators come only in the large size.
The most efficient (non-solar) are smaller, freezer above with two (2) heat pumps.
Solar refrigerator/freezers are the most efficient as they are smaller again, serious insulation and DC motor(s).
Actually NO cold air is transferred to the refrigerator side from the freezer. It would be too hard to regulate.
But your idea of cold ?sinks? is true. That is why the bottom freezer is slightly more efficient. When you open it, the ?cold? does not pour on the floor; it just stays in the drawer. So, there is less ?substituted? air to be re-cooled and dehumidified.
The only drawback is that these refrigerators come only in the large size.
The most efficient (non-solar) are smaller, freezer above with two (2) heat pumps.
Solar refrigerator/freezers are the most efficient as they are smaller again, serious insulation and DC motor(s).