Electricity consumption from electric water heaters represents a significant portion of household budgets, particularly during winter months. Most households keep their units running for excessively long periods or activate them at inappropriate times. By applying simple daily techniques, cost reduction becomes immediately noticeable on the next electricity bill.
Water heater: The ideal operating time for maximum economy
Conventional water heaters with 60 to 80-liter capacity require specific time periods to achieve optimal temperature. For one person, the ideal duration ranges between 10 and 12 minutes, while two consecutive users require approximately 15 to 20 minutes.
When operation exceeds 20 to 25 minutes, the device continues consuming electrical energy without additional benefit. The water has already reached the desired temperature and further operation only leads to repeating the heating process.
Economical operating hours and tariff zones
The traditional nighttime tariff no longer applies uniformly across Greece. Instead, reduced charging periods are implemented, which vary depending on the provider and selected dual-zone program.
In practice, if you have dual-zone time pricing, there are designated hours during the day when the cost per kilowatt-hour is reduced. Usually these periods occur during midday and evening hours. Conversely, single-zone tariffs maintain constant charging throughout the 24-hour period.
Continuous operation or periodic activation
The optimal practice for maximum economy is periodic activation and deactivation of the device. Water heaters operate through electrical resistance that continuously consumes energy while remaining in operating mode.
The effective method involves activating the device exclusively when hot water is needed, maintaining operation for 10 to 20 minutes, and deactivating it before use. Water retains high temperature for considerable time after deactivation.
Signs of excessive energy consumption
Certain symptoms indicate that your water heater consumes more energy than necessary:
• Delayed achievement of desired temperature
• Rapid depletion of hot water
• Acoustic indicators such as boiling sounds or metallic noises
• Unjustified increase in electricity bills
Usually these problems result from salt accumulation on the heating element, thermostat wear, or inadequate insulation. Annual maintenance reduces consumption and enhances operational safety.
Additional energy saving techniques
Installing a timer allows automatic control of activation and deactivation for required minutes. Pipe insulation prevents heat loss during water transport.
Reducing shower duration directly affects heater operating time, as each additional minute of use corresponds to equivalent operation extension. Additionally, avoiding unnecessary faucet operation preserves hot water for longer periods.
Alternative water heating solutions
Depending on home characteristics, different options offer greater economy. Solar water heaters provide the most economical long-term solution, while natural gas boilers are ideal for large families.
Water heat pumps provide high efficiency with lower operating costs. Nevertheless, traditional electric water heaters remain the primary choice for most apartments, with proper usage making the decisive difference.
Implementing appropriate techniques can transform your water heater into an exceptionally economical solution. With limited operating duration, preference for reduced-rate hours, and small practical changes, electricity bill benefits can be impressive and immediately noticeable.
