Tankless vs. Tank Water Heater – Looking for a new water heater? The two main choices are tankless and traditional tank models. Tankless heaters work on-demand, heating water only when you turn on the tap.
Traditional heaters store hot water in a tank, ready for use anytime. While tankless models are more energy-efficient, tank heaters are typically cheaper upfront and easier to install.
Dive deeper to explore the pros and cons of tankless vs tank water heater and find the perfect fit for your home!
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Tankless vs. Tank Water Heater

1. Tankless Water Heater
The first one is the tankless water heater or sometimes called instant water heater. Unlike traditional water heaters that store hot water, tankless models heat water instantly as you need it.
It operates by using a series of extremely hot coils to quickly heat the cold water stream. Because the tankless water heater only heats water when it’s needed, this is a huge advantage in cost and energy efficiency compared to tank water systems.
They use either gas or electricity to heat up special chambers (heat exchangers) through which the water flows.
It usually lasts much longer than the traditional tank water heater, with a span life of up to 20 years with proper maintenance although the initial cost is much higher than it is with the tank water heater.
Also, because this type of water heater does not have a tank, you don’t have to worry about wasting power to heat and reheat the water.
And on top of that, compared to tank water heaters, they often require less space and are more efficient.
Also Read: “When To Change Your Water Heater?“
2. Tank Water Heater
The next one is the more traditional tank water heater. This type of water heater is sometimes also called the storage water heater.
They use gas or electricity to heat a tank of water (usually 20 to 80 gallons) located at the bottom. Once hot, the water is stored for later use.
Additionally, natural gas or electricity are the two main power sources for tank water heaters. However, other tank water systems also utilize oil or LPG as it power source.
Well, the tank water heater has an advantage in terms of the simplicity of its installation and cheaper initial cost.
But there is the major drawbacks for the tank water system is its efficiency and cost-effectiveness because it’ll switch back on to reheat the water to the desired temperature once the hot water is used or enough time has passed for the water to cool.
So there you go, a brief difference between tank water heater vs. tankless water heater!
Either it’s the tank or tankless water heater that you might choose, the one thing that you should consider is the safety of the water heating systems regarding its types.
So, we advise you to choose the water systems that have already been certified by the SNI certification.
The SNI certificate is the certification for various products or services to ensure that every aspect of safety and quality is tested and up to Indonesian standards before being sold or distributed in Indonesia.
For the water heating system, the regulation is clearly stated in SNI IEC 60335-2-21:2010 and SNI IEC 60335-2-35:2010 about tank and tankless water heating systems respectively.













