Overview of water heaters
A water heater, also known as a hot water tank or hot bath tub, serves the purpose of quickly heating water for convenient use in activities such as bathing, hair washing, and household chores. A standard water heater includes the tank shell, heating element, insulation layer, sediment trap, temperature control, power cord, indicator light, display screen, inlet and outlet valves, and safety lock.

Choosing the right water heater also involves considering its operating principle and design. The device takes in cold water and heats it using an electric heating element. Currently, there are two common types of water heaters in the market: direct and indirect.
Which type of water heater should you buy?
Every tank capacity or feature set in a water heater is aimed at a specific daily user demographic. Consider the following criteria to select the most suitable water heater for your needs:
For personal use
If only for personal use, prioritize a water heater with a capacity of 15 liters or less. This capacity is sufficient for one user, with a compact design and full functionality.
For families of 2 - 3 members
If you're using it for a family of 2 - 3 members, opt for a water heater with a capacity of 20 - 25 liters. This capacity meets the needs of family members when heating up to 80 degrees.
For families of 3 - 4 members

For a family of 3 – 4 members, the answer lies in a capacity ranging from 25 – 30 liters. The price is relatively high, and the heating time for water will also be longer compared to smaller capacity heaters.
For families of 4 – 6 members
Currently, there are still many households of this size, with significant demand for hot water in the colder months. Therefore, it's advisable to invest in larger capacity water heaters to ensure constant availability, typically with a capacity of 30 liters or more.
Purchasing a water heater also needs to consider requirements
Simple usage
A simple water heater is one that only performs the functions of heating, sediment discharge, and ensuring other safety issues. Typically, these heaters are operated by turning on or off the circuit breaker, monitoring the temperature on the display screen. Prices range from around 1.5 – 4 million dong depending on power.
Modern Usage

Choosing the right water heater, modern and ensuring a comfortable life is a question for many affluent families. For this demand, prioritize heaters with advanced features such as automatic sediment discharge, temperature scheduling, timer, temperature adjustment via touch buttons or phone. Shorten operation time as well as convenience and comfort when needed.
Brand Preference
There are many reputable brands in the market manufacturing water heaters. To determine which brand is the best, there is no exact answer. Each brand will have its own advantages and disadvantages to win over customers. The most popular brands include Kangaroo, Ariston, Ferroli, Picenza, Rossi, Shc, Electrolux, Lamborghini…. Be sure to ask sales staff for advice on choosing the most suitable model.
Therefore, each need will have its own type for you to choose. When buying a water heater, determine your needs and conditions correctly. For further advice, please share your thoughts in the comments section of this article.