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Upgrading to a Tank less Water Heater: Pros and Cons

For a considerable time, traditional tank water heaters have been the popular choice for supplying hot water in our homes. Nevertheless, with technological advancements, tank less water heaters have emerged as an alternative solution. These on-demand water heaters provide numerous advantages compared to conventional tank heaters. In this piece, we will delve into the advantages and disadvantages of upgrading to a tank less water heater, empowering you to make an informed decision regarding your home’s hot water needs.


There are numerous pros of a tank less water heater, such as:

Energy Efficiency:

Tankless water heaters offer a notable benefit in terms of energy efficiency. Unlike conventional tank heaters that continuously heat and store water, tankless units only heat water as it is needed, eliminating standby energy losses. This on-demand heating approach ensures that energy is consumed solely when hot water is required, resulting in potential energy savings of up to 30% compared to traditional tank heaters. Consequently, homeowners can enjoy reduced utility bills over time as a result of this improved energy efficiency.

Space-Saving Design:

Tankless water heaters possess a compact and wall-mounted design, occupying considerably less space than their traditional tank counterparts. The absence of a bulky storage tank makes them particularly suitable for smaller homes, apartments, or areas with restricted space availability. This space-saving characteristic renders them versatile options for both new constructions and retrofitting projects in existing residences.

Endless Hot Water Supply:

Tank less water heaters offer an endless supply of hot water. With this system, you can enjoy long showers or run multiple appliances simultaneously without worrying about running out of hot water. This advantage is particularly valuable for larger households that have high demands for hot water.

Longer Lifespan:

Tank less water heaters have a longer life as compared to the traditional tank heaters. With proper maintenance, a tankless unit can last up to 20 years or more, but conventional tanks typically require replacement every 10 to 15 years. Although the initial cost of a tank less system may be higher, its extended longevity offers significant long-term cost savings.

Reduced Risk of Water Damage:

If the storage tank of a conventional water heater rusts or splits, water can leak out, which could cause flooding. Tankless water heaters, on the other hand, don’t pose the same danger because they don’t need a storage tank. The likelihood of water damage to a home is reduced, and the homeowner gains peace of mind.


There are numerous cons of a tank less water heater, such as

Higher Initial Cost:

Tankless water heaters have a larger initial investment compared to conventional tank heaters, which is a major disadvantage. Professional installation, which may need alterations to the existing plumbing and electrical systems, is also included in the price. The initial expenditure may seem high, but think about the money you’ll save on energy costs and how much longer your product will last.

Limited Flow Rate:

Despite the fact that tankless water heaters never run out of hot water, their flow rates are restricted. A single tank-less unit may not be able to keep up with several simultaneous hot water needs, such as when a dishwasher, washing machine, and shower are all in use. If this is the case, a bigger, multi-unit installation or a point-of-use tank less unit in an advantageous location may be required.

Cold Water Sandwich Effect:

The effect known as the “cold water sandwich” is something that occurs with tankless water heaters very often. In this case you will experience  cold water after turning off the hot water tap and then turning it back on again shortly afterward. This is because the water heater takes a moment to reset itself once the tap is turned off.  It is not a severe issue, but it may affect certain users’ experiences.

Maintenance Requirements

Similar to other household appliances, tankless water heaters necessitate regular maintenance. Failing to perform proper maintenance can result in mineral buildup, decreased efficiency, and potential breakdowns. Homeowners should consider the cost of periodic maintenance as an important factor when contemplating the installation of a tank less water heater.

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Transitioning to a tank-less water heater brings forth notable advantages such as energy efficiency, space-saving design, uninterrupted hot water supply, and extended lifespan. However, it is crucial to carefully consider these benefits in relation to the higher upfront cost, potential flow rate constraints, and the requirement for regular maintenance. Assessing your household’s hot water requirements, financial resources, and long-term energy conservation objectives is essential before committing to a switch to a tank-less water heater. Seeking guidance from a professional plumbing company in Los Angeles can provide invaluable advice tailored to your specific needs and aid in making an informed decision.

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