As energy efficiency becomes an everyday concern, small habits can make a real difference. The refrigerator is one of the most energy-consuming appliances in any household — but here’s a surprisingly simple trick to help it run more efficiently: placing a bowl of water inside. Here’s how it works.
Every time you open your fridge door, warm air rushes in, and the appliance has to work harder to cool down again. Placing a bowl of cold water on a stable shelf (typically lower or central) helps to maintain a more consistent internal temperature, reducing the need for frequent cooling cycles.
Water has a high heat capacity, meaning it can absorb and hold cold longer. Acting as a thermal buffer, the bowl helps minimize temperature fluctuations — particularly useful in partially empty refrigerators where cold air moves more freely.
Opt for a glass or ceramic bowl, which retains cold better than plastic. These materials also avoid chemical interactions with food or odors.
Position the bowl in a central or lower shelf, where the temperature tends to be the most stable. Avoid placing it against the back wall or in front of air vents.
Change the water every two weeks to keep it fresh and effective. This maintains the cold-retention capacity and avoids odors or mineral deposits.
A well-stocked fridge uses less energy than an empty one. That’s because food items retain cold more effectively than air. If your fridge is underfilled, use extra water-filled bottles or containers to help maintain a consistent cool environment.
In summary, placing a bowl of water in your fridge is a simple yet effective way to stabilize its internal temperature and reduce electricity usage. It’s an easy eco-friendly habit that can lower your energy bill while extending your appliance’s lifespan. Sometimes, small steps can lead to big savings.
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