When most people open their electricity bills, they blame obvious culprits like air conditioners, televisions, or kitchen appliances. But one of the biggest energy users is often hidden in plain sight: the electric water heater. Tucked away in a utility closet or basement, it works quietly yet consumes large amounts of power in short, intense bursts. Unlike devices that draw small amounts of electricity steadily, a water heater typically uses between 3,000 and 4,500 watts when heating—more than many everyday electronics combined.

What makes it costly is not just hot showers or dishwashing. The unit cycles on and off throughout the day to maintain water temperature, even when no one is home. In larger households, frequent use increases the workload significantly. Over time, sediment buildup inside older tanks forces the system to work harder and less efficiently. Without regular maintenance or energy-efficient upgrades, this overlooked appliance can steadily inflate monthly electricity costs.