If you are looking for a clever hack to keep your home running efficiently, you may have seen the suggestion to place balls of aluminum foil in your freezer. Proponents claim this simple prehistoric-era material can save you significant money, but does the science behind it actually hold up to an observant eye?
The “Ingredients” for the Trick
This method is incredibly simple and requires only:
- Standard Aluminum Foil: Crinkled into loose balls or used as flat sheets.
- An Empty or Sparse Freezer: The trick is most often recommended for freezers with a lot of open “breathing room”.
Technical Breakdown: How It “Works”
1. Improving Thermal Mass
An empty freezer has to work much harder to maintain its “defrost” cycle because air loses temperature quickly every time the door is opened. By filling empty space with aluminum foil balls, you increase the thermal mass. This act is a kind gesture to your appliance, as it prevents the “sh0ck” of rapid temperature rises.
