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Storage Vs Instant Water Heater – Which Should I Install?

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In Singapore, families buy different water heater brands such as Ariston water heater, Rheem water heater, or Joven water heater for comfort. Even though most Singaporean homes have installed a storage water heater, some families choose an instant water heater as they would like to reduce their electricity consumption.

Therefore, for the benefit of individuals and families who would like to purchase a new water heater or replace their existing one, here are different aspects of purchasing and installing a water heater – whether it is a storage or an instant water heater are detailed below:


Cost of Installation

The cost of installation is one of the key aspects to be considered while comparing other types of water heaters. The difference between a storage water heater and an instant water heater is that the method of installing a storage water heater is relatively simple – lowering the installation cost. On the other hand, the time taken to install an instant water heater is longer and complex since the heating coils are linked with the piping. As a result, professional plumbing services charge more for instant water heater installation. For the same family size, the cost is generally double the charge of a storage water heater.


Price Of The Water Heater

Factors such as capacity, features, brand, and more affect the pricing of a storage water heater. A storage water heater is more cost-effective for the same quantity of hot water needed in comparison to an instant water heater. Also, a storage water heater has a simpler design, with fewer parts, and is less costly. Meanwhile, an instant water heater is designed to be more complex as it quickly provides hot water but tends to be more pricey than a storage water heater.


Operating Costs


In Singapore, water heaters mostly use electricity as their source of energy. Although a few of them use gas, this may be risky to the safety of their water heater. Once the warranty period of the water heater is over, the energy and maintenance fees are the main operating costs. Noticeably, if the family uses a big amount of hot water daily, an instant water heater is more energy-saving than a storage water heater.


Energy Efficiency

Storage water heaters heat the water to the present temperature and store it until you use it. One common issue with storage water heaters is standby loss whereby there is some heat loss from the water storage tank – depending on the design or insulation used. Additionally, heating the water uses more energy. This decreases the energy efficiency of storage water heaters. Contrastingly, instant water heaters only heat water when it is needed – thus greatly reducing heat loss. Therefore, energy efficiency is higher with installing an instant water heater.  It is important to install energy efficient water heaters if you want to save money and reduce the cost of your electricity bills.




Generally, water heaters perform best when they can provide hot water whenever needed. Storage water heaters typically have a sufficient amount of hot water needed for multiple bathing, dishwashing, and other cleaning activities. Both instant and storage water heaters cannot adequately provide hot water for bigger families especially when it is needed for different applications used at the same time.



Heating elements and several parts are exposed to water at a higher temperature if the recently purchased storage water heater is on all the time. It reduces the storage water heaters’ life by 10-15 years because there is an increase in corrosion and mineral deposits. Instant water heaters, however, are switched on when it is needed. Since the components are not heated nor exposed longer in water, instant water heaters can last more than twenty years, as long as you do not have any problems with your water heater and know how to maintain it. An installed water heater’s lifespan depends on the number of people in a household. The water heater will last longer if only one or two persons live in the house, as opposed to having five or more family members using more hot water.


Water Usage 


Water usage patterns are another thing to consider when choosing an instant water heater or storage water heater. In various homes, they use one water heater for several applications at once to clean and bathe. Storage water heaters store hot water and commonly supply the water needed at the predetermined temperature. Instant water heaters, on the other hand, cannot supply huge amounts of hot water at the same time to separate rooms or applications. In a few cases, the water temperature may vary so long as it does not overheat – a common issue with water heaters in Singapore.



Whether it is a storage water heater or an instant water heater, there are things you should know about installing a water heater.  These include the installation cost, lifespan, water usage, performance, energy efficiency, purchase price, and operating costs. If you are looking to opt for an instant or a storage water heater, you can check out the 10 best instant and storage water heaters in Singapore. Once you have decided on what to purchase, it is best to have a professional install your chosen water heater.


Everyworks Singapore provides the best home maintenance solutions available in Singapore. Moreover, we ensure quick customer response, prompt booking, and reasonable and affordable prices for whatever services you acquire. Our highly experienced and skilled plumberelectricianaircon servicing technicians, and handyman teams can also guarantee that the work performed is completed professionally and efficiently as illustrated by our highly-rated Google and Facebook reviews. See our past home maintenance works and articles to learn more about our home services in Singapore. To set an appointment promptly and have your issues resolved immediately, simply contact our attentive customer support team by sending a quick text or picture through Whatsapp at +65 82410032.


This article was reproduced from Water Heater City Singapore.

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