1. Conventional water heater
This is by far the most recognized water heater as it has been into the mainstay for many years. You may still find many homes using the conventional water heaters. It has a tank where you can store all the heated water for the further use. As it heats up all the water that is stored inside the tank, it takes lot of time and energy in the process and if you are someone who is looking for a low energy consumption unit, then you must stay away from the conventional water heater. As they have a huge tank, they also require regular maintenance as you have to clean the tank to get rid of all the sedimentary deposits. If you are not going to remove the deposits timely, then it is going to affect the efficiency of the unit, where it will take even more time and energy to heat up the water.
2. Tankless water heater
Tankless water heaters are the new popular choice in the market and many people are switching to them from the conventional water heaters. As they are very easy to maintain and offer you a long life, it makes them the first choice for many people. They have no tank to store the water and thus they take a lot less time and energy to heat up the water for the usage. The heating element inside the unit heats up the water instantly and you get the supply of hot water the moment you switch on the unit and tap. They also have very low Hot water heater repair cost, as they come with warranties of up to 10-15 years. They are bit on the expensive side but you are going to recover the cost in the saved energy consumption and the longer life of the unit.