An electric geyser or electric water heater is essential in modern homes, providing hot water for tasks like bathing and cleaning. It works by using electric heating elements, a thermostat, and safety features like a pressure relief valve, ensuring both efficiency and safety.
An electric geyser, sometimes referred to as an electric water heater or electric hot water tank, is a household appliance designed to provide a continuous flow of hot water for various uses, with bathrooms being one of the most common locations. In modern homes, this appliance is essential for providing hot water for bathing, washing dishes, and other household tasks. Below is an explanation of how a bathroom electric geyser functions:
The tank is a key part of the geyser, typically cylindrical and coated with glass or enamel to prevent corrosion. It is built from materials capable of withstanding high temperatures and is surrounded by insulation to retain heat. Inside the tank, there are one or more electric heating elements, often made from a high-resistance material like nickel-chromium alloy. These elements are responsible for heating the water. See our electric rod water heater guide for more detail on this component.
A thermostat is attached to the heating elements and regulates the temperature of the water. When the water reaches the desired temperature, the thermostat switches off the heating element to maintain the set temperature. Additionally, a pressure relief valve is fitted to release excess pressure, preventing dangerous situations caused by overpressurization.
When you turn on the electric geyser, electricity flows to the heating elements. These elements heat the cold water inside the tank by producing heat through electrical resistance. As the water heats up, it rises to the top of the tank, allowing cold water to flow into the bottom to be heated while hot water is drawn from the top. The thermostat continually monitors the water temperature, activating or deactivating the heating elements as needed to ensure a steady supply of hot water.
Safety features like the thermostat and pressure relief valve prevent overheating and excessive pressure. If the temperature gets too high, the thermostat shuts off the heating elements, while the pressure relief valve releases water if the pressure inside the tank exceeds safe levels.
To enhance energy efficiency, many electric geysers are insulated to reduce heat loss. Modern models may also feature timers and digital controls, allowing users to set specific heating schedules to conserve electricity. See our WiFi switch and timer guide for smart scheduling options.
Frequently Asked Questions
What is the price of an electric geyser for a bathroom in Pakistan?
A small-to-medium electric geyser suited for a single bathroom (typically 15-25 litres) starts around Rs. 18,000, with mid-range options extending to about Rs. 28,000 as of 2026.
What size electric geyser is right for one bathroom?
A 15-25 litre tank is generally sufficient for a single bathroom's daily hot water needs, while larger households sharing one bathroom may prefer 35 litres or more.
Do electric geysers need special bathroom wiring?
Yes — electric geysers should be installed with a dedicated circuit and proper earthing (ELCB protection) by a qualified electrician, since they draw significant power and operate in a wet environment.