A simple, low-cost trick to reduce freezer burn and lower energy costs has gained traction online: filling empty freezer space with everyday items like pool noodles and closed containers. The idea, passed down through home efficiency tips, is backed by appliance manufacturers and now, anecdotal evidence from those who’ve tried it.
The Science Behind the Hack
Freezers work most efficiently when they’re relatively full. An empty freezer struggles to maintain consistent temperatures, forcing the compressor to work harder to circulate cold air. This inefficiency leads to higher energy bills and, more noticeably, freezer burn—those unsightly and unappetizing grayish-brown spots on food caused by dehydration.
The solution is surprisingly straightforward: filling unused space with items that displace air. Pool noodles, empty food containers (with lids sealed), or even cardboard boxes from frozen meals can act as thermal mass, helping maintain a stable temperature. The goal isn’t to pack the freezer solid, but to reach around 75-80% capacity.
Why This Works, According to Experts
Whirlpool, a major appliance manufacturer, confirms the principle: “Keeping your freezer around 75% to 80% full helps retain cold air. If the freezer is fully filled, food may block the internal air vents, making it harder to distribute cold air throughout the freezer.” The thermal mass of frozen items—or even a pool noodle—reduces temperature fluctuations each time the door opens, minimizing warm air intake.
Testing the Method: Real-World Results
One individual put the hack to the test by adding a pool noodle and empty containers to their nearly empty freezer. The results were noticeable: freezer burn was eliminated on meat and seafood, and the monthly electricity bill decreased by several dollars.
The key takeaway: This isn’t just a quirky tip; it’s a practical application of thermal dynamics that can save both food and money.
The method is easy to implement, requires minimal effort, and leverages readily available materials. By keeping your freezer fuller, you improve efficiency, reduce waste, and potentially lower your energy consumption.
