An electric geyser functions by conducting electricity to a heating component and transforming it into heat that then heats up the water surrounding it. The thermostat regulates the heat by switching on and off the heating component. The insulated tank maintains the heat in the water until the need arises for its use. This is the working principle of an electric geyser and all other electric water heaters. Below is a description of how an electric geyser operates.
How an Electric Geyser Heats Water
Here is how an electric geyser heats water, step by step:
- Power on: Once you turn on the geyser, there will be a flow of electricity to the heater.
- Generation of heat: There is resistance to the flow of electricity and thus generation of heat through the process of resistance.
- Heat transfer: The heat is transferred from the heater to the water around it.
- Circulation: Hot water floats at the top of the tank, while the cold water is at the bottom where the heat reaches it next.
- Monitoring and regulation: This is done by the thermostat.
Main Components of an Electric Geyser
Each part of a storage water heater has a specific job. Here are the main electric water heater components:
Heating Element
The electric geyser heating element is a metal coil or rod, usually sheathed, that sits inside the tank. When current passes through it, it heats up and warms the water around it. A higher wattage element heats water faster.
Thermostat
The thermostat senses the water temperature and switches the element on or off to hold the temperature you selected. It is the core of electric geyser temperature control.
Storage Tank and Insulation
The tank holds the heated water. A layer of insulation in the electric water heater reduces heat loss, so the water stays warm for longer and the element switches on less often.
Inlet and Outlet Pipes
Cold water enters the tank through the inlet pipe. Hot water leaves through the outlet pipe and is delivered to your taps or shower.
Safety Valve and Thermal Cut-Out
The pressure-relief valve releases excess pressure from the tank. The thermal cut-out switches off power if the water overheats, for example if the thermostat fails. Together they make up the main electric geyser safety features.
How Does an Electric Geyser Thermostat Work?
The thermostat in an electric geyser keeps the water at a steady temperature without you having to watch it:
- It detects when the water reaches the selected temperature.
- It then cuts power to the heating element.
- As the water cools below the switching threshold, it turns the element back on.
- This cycle repeats automatically, which is how electric geysers maintain water temperature.
Even when the heating element is off, the geyser may still draw a small amount of power for other functions, such as an indicator light or electronic controls, if the model has them.
How Does an Instant Electric Geyser Work?
Instant geysers do not contain tanks of hot water. Instant geysers heat the flowing water with the help of a heating element and thermostat that senses the water flow.
Storage vs. instant geysers:
- Water storage: Storage geysers store hot water, but instant geysers heat the water instantly.
- Time of heating: Storage geysers take time to heat the water inside the tank. Instant geysers provide hot water within seconds.
- Power of the element: Instant geysers require a powerful heating element, i.e., of 3,000 W or more.
How Long Does an Electric Geyser Take to Heat Water?
The time taken to heat is determined by four factors. These include the capacity of the tank, the power of the element, the temperature of the feed water and the desired temperature.
To illustrate this practically, the time that it would take to heat a 50 liter geyser with 1500 watts, raising water temperatures from 20°C to 60°C would be between 1.5 and 2 hours.
How Much Electricity Does an Electric Geyser Use?
Electric geyser energy consumption depends mainly on the element’s wattage and how long it runs. To estimate it:
Energy (kWh) = Wattage ÷ 1,000 × Hours of operation
For example, a 1,500 W element running for one hour uses 1.5 kWh. To estimate the cost, multiply the kWh by the per-unit rate on your electricity bill, which is how you can work out electric geyser electricity consumption in Pakistan for your own home.
Because the thermostat switches the element off once the water is hot, the geyser doesn’t run continuously. Good insulation, a moderate thermostat setting and careful hot-water use all reduce overall consumption.
Conclusion
An electric geyser heats water by turning electricity into heat through its heating element, while the thermostat controls the temperature and the insulated tank keeps water warm. Knowing the working principle of an electric geyser helps you choose the right type, estimate heating time and keep electric geyser energy consumption under control. Good insulation, a sensible thermostat setting and working safety features make the geyser more efficient and safer to use.
Ready to Buy an Electric Geyser?
Explore our range of electric geysers and other home appliances in Pakistan at Master Appliances PK. Visit our store or contact us today to find the right geyser for your home.
Frequently Asked Questions
Does an electric geyser heat water automatically?
Yes. After you switch it on, the thermostat manages the heating cycle, turning the element on and off to hold the selected temperature.
Does an electric geyser switch off when the water is hot?
The thermostat automatically cuts power to the heating element once the water reaches the set temperature. It may restart later as the water cools or when you draw hot water.
Does an electric geyser work during load shedding?
If you switch off only the heating control, the element stops heating, but some models still draw a small amount of power for indicators or electronics. To fully isolate the geyser, switch it off at the electrical supply or isolator.
How do you know when an electric geyser is fully heated?
Most models have an indicator light that changes state, for example turning off or changing color, when the water reaches the set temperature. Indicators vary by model, so check your manual.
