Which Size of Top-Freezer Refrigerator Is Most Efficient?

Size

• When it comes to optimizing the efficiency and utility of your refrigerator, a 16 to 20 cubic foot model tends to be the best choice. Larger refrigerators require more energy to stay cool and take up more space, so they should be avoided. Smaller refrigerators can be more efficient but may not contain a true freezer or be large enough capacity for a household.

Defrost Systems

• Many refrigerator models today incorporate an automatic defrosting mechanism and are called “frost-free” refrigerators. These types of refrigerators are much less efficient compared with manual defrost models, which consume 35 to 40 percent less energy. But that level of energy efficiency is only true if you are diligent in defrosting your freezer. When too much ice builds up, the freezer works less efficiently. The best approach for efficiency is to use a manual defrost freezer and defrost it when the frost reaches 2 inches in thickness. This may require you to remove items and let the frost melt about once a year.

Design and Features

• Generally, top-mount freezers consume less energy than those with the freezer on bottom, and side-by-side models. But ice-makers and water dispensers can increase energy demands by 14 to 20 percent. These features also make a refrigerator more expensive, so if its economic efficiency you’re looking for, simple models are best. The condition and maintenance of your appliance is also important. Poor seals on door gaskets can allow warm air to leak in, forcing the cooling system to work harder.

Location

• An efficient refrigerator placed in a poor location can create a huge energy drain. Ideally, it should be placed away from sunlight and heat, where there is plenty of air circulation. It's best to keep refrigerators away from stoves or heating vents. The compressor and condensing coil need ventilation to work efficiently, and should be placed a few inches away from the wall, particularly if the coils are exposed. This allows space for heat to be released.