Electric Water Heater: Electric Water Heaters

This type of water heater uses electrical energy to heat the water. Water heater electric energy is also divided into two types, which use tank (storage) or who does not use a tank (tankless). 

1.-made electric water heater tank (Storage - Electric Water Heater) 

This type of electric water heater uses a tank to store hot water before use. Characteristics cylindrical horizontal or vertical, and because they are large enough and eating places, usually mounted outside the bathroom. And the water in this tank is heated until it reaches the desired temperature. Components and how it works looks like the next picture. The main components of this tool is an electric heating element that is located at the top and bottom of the tank. When the incoming cold water to the tank, the heating element heats the water began to work in the tank until it reaches the desired temperature. And when the water temperature in the tank begins to fall, to two heating element heats the water is working again until it reaches the temperature that has been set up. With dimikian water temperature in the tank is always awake and always available every need. Therefore, use an electric water heater tank is more wasteful electric power consumption. Electrical power continues to be sucked to maintain stable water temperature in the tank even if no one is using hot water. Here's an example of Amazon's Reliance brand products with a capacity of 6 gallons.

Reliance-SEWH-6 gallons(click the pic for spec & details, from amazon)

2 electric water heater without a tank (Tankless - Electric Water Heater)

Rheem-tankless electric water heater
(from Amazon, click pic for product spec & details) 

wearing Tank	without Tank
Size: Large dining spot	Small, do not eat the
Electricity: power consuming, work continues	More efficient power, work when needed
Price: Expensive	Cheaper,
Availability of hot water: there is always a	Want hot water? wait first
Suitable for large families	Suitable for small family

For this second type that does not require a tank. So the water does not need to be accommodated first. Just like a gas water heater without a tank, electric water heater without a tank of this new work heats the water when the water faucet is opened. The water from the faucet indirect heat, it took a while to get hot water is desired. Long wait for it depends on the size of the appliance watts of electricity. The greater the wattage the faster its hot water out of krannya, and vice versa. 
How it works the same as a gas water heater without a tank. When the faucet is opened, water flow is detected by a water flow sensor (flow-switch) and activate the heating element in the heating module and heat water to the desired temperature. After reaching the desired temperature or turn the faucet on (flow switch does not detect any water flow again), the heating element was automatically dead. So just when it needs it works. Thus more efficient power consumption, although no hot water available at all times. Must wait for the first few moments after the tool works. Here's an example of its products.
conclusion: