1. Why is Your Water Heater Using More Electricity Over Time?
As your water heater ages, you may notice an increase in electricity consumption. This can be attributed to several factors, including:
– Buildup of Sediment Inside the Tank
One of the primary reasons for the increased electricity consumption of your water heater is the buildup of sediment inside the tank. Over time, sediment will form regardless of the water source. As the water heater is used, this sediment gradually accumulates on the internal components.
Specifically, if the heating element of the water heater is covered with sediment, its heating efficiency decreases. Additionally, if sediment builds up inside the tank, its ability to retain heat is compromised. As a result, the water heater takes longer to heat the water, while heat is rapidly lost, leading to continuous operation and higher electricity usage.
– Reduced Heat Retention Efficiency
Another reason for the increased electricity consumption of your water heater is the decline in its heat retention efficiency over time. This is particularly true for large-capacity water heaters, often referred to as indirect water heaters.
These water heaters feature a water storage tank, also known as the inner tank, which is surrounded by an insulating layer. This layer is designed to retain heat and keep the water inside warm.
However, over time, the insulating layer is affected by continuous high temperatures, causing a decrease in heat retention efficiency. Consequently, the temperature of the heated water drops quickly, requiring the water heater to operate continuously to maintain the set temperature.
This not only inconveniences users but also significantly increases electricity consumption.
– Reheating Water Multiple Times
Leaving your water heater on 24/7 can lead to multiple reheating cycles, which is not only inconvenient but also contributes significantly to higher electricity usage.
The main reason for this is that the water inside the tank cools down when the heater is not in use for extended periods. When the water temperature drops below the set level, such as 60°C or 65°C, the water heater automatically restarts to heat the water to the desired temperature. This reheating process is time-consuming and electricity-intensive, impacting your electricity bills.
2. The “Small Switch” Under Your Water Heater Can Help Reduce Electricity Usage
Many water heater users may not be aware of an important component located underneath their unit – the magnesium anode rod.
This rod plays a crucial role in protecting the water heater from corrosion, thereby extending its lifespan. However, not everyone pays attention to inspecting and maintaining the magnesium anode rod during its service life.
For most water heaters, the magnesium anode rod typically lasts for about two years. However, if the water quality is poor, its lifespan may be reduced to just one year. Therefore, experts recommend that users inspect the rod annually, if possible.
This is important to ensure the rod’s effectiveness in reducing sediment buildup inside the water heater. When the magnesium anode rod functions properly, the water heater’s heating efficiency increases, resulting in reduced electricity consumption.
When inspecting the rod, it is essential to follow safety protocols. First, turn off the water and power supplies. Then, use a wrench or specialized tool to open the drain valve before proceeding with the inspection. Adhering to this procedure ensures the user’s safety and minimizes the risk of accidents.
Additionally, when using a water heater, there are two important points to consider. Firstly, for a new water heater, it is acceptable to leave it operating 24/7 during the first 2-3 years without significant consequences. This is because a new unit has efficient heating and heat retention capabilities, and the amount of sediment buildup is still minimal. Even with continuous operation, electricity consumption remains relatively low.
Secondly, for water heaters that have been in use for more than three years, especially those that are five years or older, it is not advisable to keep them running continuously. For these units, it is recommended to turn them off when not in use. When hot water is needed, turn on the heater ahead of time, as this will help save electricity.
Furthermore, regular cleaning of your water heater is essential to ensure its efficient operation. The goal of cleaning is to remove sediment and scale buildup from the tank. For new water heaters, cleaning is recommended after about two to three years of use. For older units that have been in use for many years, it is suggested to perform cleaning maintenance every one to two years.
