Refrigerators are one of the few household appliances that run 24 hours a day, every day. Because they operate continuously to keep food fresh and safe, they also consume a significant amount of electricity over time. For many households, the refrigerator is one of the largest contributors to monthly energy bills.

While modern refrigerators are designed to be more energy-efficient, there are still simple ways to improve their performance and reduce electricity consumption. One surprisingly effective method involves something very simple: placing a bowl of water inside the refrigerator or freezer.

At first glance, this idea may seem unusual. However, this small trick can help improve the refrigerator’s efficiency by stabilizing the internal temperature and reducing the amount of work the appliance must do.

Why Refrigerators Use So Much Energy

To understand how this trick works, it helps to know how refrigerators operate.

A refrigerator works by removing heat from inside the appliance and releasing it outside. This process is performed by the compressor and cooling system. When the internal temperature rises above the set level, the compressor turns on to cool the interior again.

Every time the refrigerator door is opened, warm air from the room enters the appliance. The refrigerator must then work harder to bring the temperature back down to the desired level.

Frequent door openings, empty space inside the refrigerator, and unstable internal temperatures can cause the compressor to run more often, which increases energy consumption.

How a Bowl of Water Helps

Placing a bowl of water in the refrigerator helps create thermal stability inside the appliance.

Water has a high capacity for storing heat, which means it can absorb and release temperature changes slowly. When a bowl of water is placed inside the refrigerator, it acts as a temperature buffer.

This means that when the door is opened and warm air enters, the water helps maintain a stable temperature inside the refrigerator. As a result, the compressor does not need to work as hard or as frequently to restore the cooling level.

Over time, this can contribute to more efficient operation and slightly reduced electricity use.

Especially Useful for Empty Refrigerators

This trick is particularly helpful if the refrigerator is not completely full.

An empty refrigerator contains a lot of air. Air changes temperature quickly when warm air enters from outside. As a result, the appliance must run more frequently to maintain the desired temperature.

When containers of water are added, they help fill some of the empty space with material that retains cold temperatures more effectively than air.

This helps stabilize the internal environment and reduces temperature fluctuations.

Using Water in the Freezer

A similar trick can also be applied to the freezer compartment.

If the freezer has empty space, placing bottles or containers of water inside can help maintain a more stable cold environment. Once the water freezes, it becomes ice, which holds cold temperatures even longer.

When the freezer door is opened, the ice helps prevent the temperature from rising quickly.

However, it is important not to block air vents or overcrowd the freezer, as proper airflow is still necessary for efficient cooling.

Additional Benefits of the Water Trick

Besides helping maintain stable temperatures, the bowl-of-water trick can provide a few additional benefits.

First, it can help the refrigerator recover its temperature faster after the door has been opened. Because the water remains cold, it helps cool the surrounding air more quickly.

Second, containers of water can act as a simple backup source of cold during short power outages. The stored cold energy in the water or ice may help keep food cooler for a longer period.

While this does not replace proper food safety precautions, it can slow temperature increases during brief interruptions in power.

Other Simple Ways to Reduce Refrigerator Energy Use

Although the bowl-of-water trick can help improve efficiency, it works best when combined with other good refrigerator habits.

Here are several additional ways to reduce electricity consumption:

Keep the Door Closed as Much as Possible

Opening the refrigerator frequently allows warm air to enter, forcing the appliance to work harder to restore the temperature. Planning what you need before opening the door can help reduce unnecessary cooling cycles.

Set the Correct Temperature

The recommended refrigerator temperature is typically around 3–4°C (37–40°F), while the freezer should be around –18°C (0°F). Setting temperatures lower than necessary can increase energy consumption without providing additional benefits.

Allow Hot Food to Cool First

Placing hot food directly into the refrigerator introduces extra heat. Allowing food to cool slightly before storing it helps maintain a stable internal temperature.

Keep the Refrigerator Clean

Dust and dirt can accumulate on the condenser coils located at the back or bottom of the refrigerator. Cleaning these coils periodically allows the appliance to release heat more efficiently.

Ensure Proper Airflow

Avoid overcrowding the refrigerator, as this can block air circulation. Good airflow helps maintain even cooling throughout the appliance.

Final Thoughts

Saving electricity does not always require expensive equipment or complicated changes. Sometimes, simple household tricks can make a noticeable difference.

Placing a bowl of water inside the refrigerator helps stabilize internal temperatures and reduce the workload on the compressor. This small adjustment can improve cooling efficiency, especially in refrigerators that are not fully stocked.

When combined with proper maintenance and smart usage habits, this simple method can contribute to lower energy consumption and better appliance performance.

Small steps like this may seem minor, but over time they can help create a more energy-efficient home while keeping food fresh and properly stored.