Water Heater Singapore Guide
Buying Guides,  Home & Reno

2020 Water Heater Singapore Guide: Best Water Heaters in Singapore

After a long day at work, nothing feels quite as rewarding as standing under a hot shower or a warm soak in the bathtub. Needless to say, the water heater is an essential appliance for the modern home. But how exactly does it work? How do I go about buying a water heater in Singapore? This water heater Singapore guide will share with you all that you need to know when it comes to buying a water heater for your home. To put it simply, water heaters work in one of two ways. Either they keep stored water (in a tank) hot, or they heat the water as it leaves the tap. Each has its pros and cons. The type that you use will depend on your needs and the budget of which I will share below. 

This article was updated on 6 February 2020. 

2020 Water Heater Singapore Guide: Best Water Heaters in Singapore

Table of Contents: 

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Quick Tips on Buying a Water Heater

If you don’t have time to read through this entire guide, this section serves as a quick summary for you. Do check out the next section where we share a summary of the best water heater brands in Singapore and the models to buy. 

  • The first step is to decide which type of water heater to buy. There are two types, storage water heater, and instant water heater.  
  • You will want to consider your space available. Do you have a space to place a tank? If your space is limited, an instant water heater will be best. 
  • How much hot water do you need for your household? Storage water heaters can hold quite a fair amount of water, but it is a limited supply. If you have a huge household and wish to take back to back showers, instant water heaters might be a better option because it will not run out. 
  • Your lifestyle and preferences. If you wish to take showers with strong water pressure, a storage water heater would be more suited. Also if your bathroom aesthetics matter, a storage unit can be concealed. Note that if you want hot water in your basins, kitchen sinks and more, only a storage water heater can do that. 
  • Your budget. Storage water heaters may cost more upfront to purchase and install, but they last longer (10 years or more) than instant water heaters (5 to 7 years) and they can service multiple bathrooms. Depending on the number of bathrooms you want to install, your cost between the two options can even out to be about the same ($500 – $600 per home for 2 bathrooms). But if you are on a tight budget, instant water heaters have lower-end models that cost less than $100
  • I suggest buying the best model you can afford, for this is an item that you will want to last the years. 
  • Buy your water heater from a reputable brand. The top 3 water heater brands in Singapore are Ariston, Rheem, and Joven. 707, Champs, Rubine, and Rinnai are also considered good brands. 
  • The cost of a storage water heater will start from $200 and go upwards to $500 or more, depending on the model and capacity. An instant water heater is cheaper and you can get a good unit from $100 – $200. The cost of installation is separate from the unit purchase. Note that a storage heater can service multiple bathrooms whereas an instant water heater can only service one. 
  • The cost of installation will average from $80 to $200, depending on the complexity. Make sure to find a reliable plumber/handyman to help you with the installation. Do not attempt to do it yourself. 

Savings Tip:

Make sure to apply for a credit card that will give you rebates so you have extra savings.
Check out the best credit cards with rebates on Singsaver

Best Water Heater Brands in Singapore

You won’t go wrong choosing to buy your water heater from these brands below.

The well-known brands for water heaters are: 

  • Ariston: Reputable brand from Italy 
  • Rheem: USA brand with a Singapore manufacturing company 
  • Joven: Well-established brand from Malaysia since 1983

Other notable brands include 

Best Water Heaters to Buy in Singapore

Best Storage Water Heater in Singapore

bathroom singapore

Top Pick: Ariston Andris LUX30 30 Litres Storage Water Heater

If I’m on a budget: Rheem EHG 50 Litres Storage Water Heater (Rheem has an EHG series of water heaters from 30 – 100 litres that are very affordable)

Smallest capacity: Ariston Andris LUX 15 Litres or Champs A15 Pro 15 Litres (suitable for 1 bathroom) 

Big capacity for big household: Rheem EHG 100 Litres Storage Water Heater

For vertical storage: Rheem Vertical 65SVP10S 38 Litres Storage Water Heater 

Looks good: Ariston Andris Slim 30 Litres (also available in 20 Litres)


Best Instant Water Heaters in Singapore

instant water heater singapore

Top Pick: Ariston Aures Luxury ST33 Instant Water Heater with Constant Temperature

If I’m on a budget: 

Looks good: 

Colour option: 

If I want a rainshower option: 

Types of Water Heaters

Storage water heater

storage water heater singapore

This is the traditional type of water heater that typically looks like a cylindrical tank (though there are more modern shapes and designs now). The water in the tank is kept at a constant temperature. The storage water heater releases hot water from the top of the tank, and cold water enters from the bottom of the tank to be heated again. This means that you will always have hot water anytime you need it. 

A storage water heater is useful to supply hot water to the entire house (whereas instant can only supply hot water to 1 shower outlet). If you want hot water in your sinks and kitchen basin, you need a storage water heater. It is generally a more reliable option in terms of water flow and consistent temperature. That said, it does have its pros and cons, of which a more complex installation is of concern.


  • A storage tank can supply hot water to the entire house (not just bathrooms, but also your basins and the kitchen sink) 
  • Consistent temperature 
  • Can be placed out of sight 
  • Allows a high-pressure flow of up to 10 litres per minute
  • Can power any type of shower, from rain shower to massage jets to bathtubs
  • Longer life expectancy (10 years or more) 


  • The tank is bulky and takes up space
  • Slightly more troublesome and more difficult to install compared to an instant water heater 
  • Higher cost (but can serve more than one toilet) 
  • Limited supply – make sure to choose the right tank capacity for your household
  • Take up a fair bit of energy (gas/electricity) as it heats up the entire tank

Recommended Storage Water Heater in Singapore:

Ariston Andris LUX30 30 Litres Storage Water Heater

bathroom singapore

  • Ariston is one of the top water heater brands. Hailed from Italy, their water heaters are known for their sleek design and efficiency
  • The Andrix Lux is a combination of Italian elegance and efficiency. You get function and style in one product. 
  • Made with super-ecologic insulation materials and energy can be better conserved through its improved titanium-enamel tank. 
  • Its shell technology – a perfect balance of geometry and assembly – promises intuitive design and enduring performance. 
  • Its strong resistance to pressure and corrosion makes it a permanent fixture in the house.
Check price on Lazada >
Get the right capacity for your household needs

When choosing a storage water heater, make sure to get the right capacity for your household. Alternatively, you can choose a smaller capacity but avoid taking back to back showers. A bigger capacity will take up more energy to heat. An 8 -10-minute shower will take about 60 – 70 litres of water on average with a medium-flow showerhead. As a guide, you will pick the capacity depending on the number of people in your household. 

  • 1 person: >30 litres
  • 2 – 3 persons: 30 – 40 litres 
  • 4 – 5 people: 40 – 50  litres 
  • 5 people or more: >50 litres

Instant water heater

water heater installed in bathroom

Like its name, an instant water heater heats water at the point of time you need it. There is no tank to hold the water. The water instead is heated as it flows through the unit’s heat exchanger. It is usually installed in the bathroom and you can see the unit just next to the shower system. It is best used as a single-point heater (one for each bathroom) and can only heat up the water to your shower (not the sink). 

An instant water heater is more energy-efficient as it offers on-demand heating. However, there are also pros and cons of this model, with water pressure and aesthetics being the main concerns. 


  • Relatively inexpensive to install. You can buy and install one for less than $200.
  • On-demand water heating, so you do not need to worry about hot water running out
  • Energy is only used when the heater is being run 
  • Compact and does not take up much space (compared to a storage tank)
  • The water might not be as hot 
  • Easy to install, maintain and replace 


  • Only able to power a single shower
  • The unit is installed in the toilet and will affect the aesthetic of your toilet. You will see that luxury hotels do not have instant water heaters placed next to their shower. That being said, there are nice looking water heaters like Ariston (Rinnai and Toshiba). But if you want inbuilt water fixtures, it is unlikely you will go with the instant water heater. 
  • Water pressure is lower due to the flow restrictive that allows the water to be heated as it passes through the heater. Though some instant water heaters come with a “boost” function, it is not very effective and usually noisy. An instant water heater is unlikely to be able to power rain showers.
  • Water temperatures are inconsistent, as it is dependent on the flow rate. That being said the Ariston Aures Luxury ST33 is said to not have this problem
  • Usually only able to power hand showers due to limited flow rate. That being said, I use the Rinnai and one model comes with a rain shower extension. It works relatively well though the rain shower is not very strong it has good coverage and sufficient for home use. 

Recommended Storage Water Heater in Singapore:

Ariston Aures Luxury ST33 Instant Water Heater with Constant Temperature 

Ariston Aures Luxury ST33 Instant Water Heater with Constant Temperature 

Why buy this water heater:

  • Ariston is one of the top water heater brands. Hailed from Italy, their water heaters are known for their sleek design and efficiency
  • Most instant water heaters might face inconsistent temperature problems, but the Ariston Ares Luxury promise to bring you instant heating and constant temperature
  • Anti-scalding system brings you total safety and peace of mind
  • Its soft-touch interface and nifty functions allow to memorise up to 3 shower profiles
Check price on Lazada >

Storage vs Instant Water Heater: Which should I choose? 

I have both a storage water heater and an instant water heater installed in my home. 

My two main bathrooms are powered by the storage water heater (this was done during my home renovation so it was easy to conceal). My spare bathroom uses an instant water heater (I had this done after I moved in). They both work equally as well, each with its own advantages. 

Choosing between storage or instant water heater to power your home is dependent on your needs and lifestyle preferences.

  • If you want hot water in your basins and kitchen sink, only a storage water heater is able to do that.
  • If your bathroom aesthetics are of concern, and you prefer built-in water fixtures, you should opt for the storage unit.
  • If you also like to take very hot showers, powerful rain showers or soak in the bathtub, an instant water heater will not be suitable as the water flow and pressure is limited.
  • But if you are simple, and just want something that is easy to install and works alright, you can opt for an instant water heater.
  • It also depends on whether you are staying in a house or a flat. If you are staying in a 2-storey house you might opt to do both – a storage heater for the top floor bathrooms and an instant water heater for the spare bathroom, like what J Babies did.

Cost-wise, if you are buying a water heater for a new home (2 bathrooms), it will work out to be pretty much the same cost (about $500 – $600) for purchase of unit and installation.

You can refer to this summary table for the list of pros and cons between storage and instant water heater. 

Type of water heaterStorageInstant
  • Can supply the entire house
  • Can power any type of shower
  • Consistent temperature
  • Can be hidden in the ceiling or in a cabinet
  • Allows high-pressure flow
  • Longer life expectancy
  • Limited water supply
  • Cheaper upfront cost
  • On-demand heating
  • Energy-efficient
  • Compact size
  • Easy to maintain, install, replace
  • Endless water supply
  • Bulky
  • More complex installation
  • Higher upfront cost 
  • Limited supply
  • More energy usage
  • Can only power 1 shower, not the sink
  • Temperature/flow can be inconsistent
  • Low water pressure
  • Can only power hand showers

FAQ & Installation

Q: How much is it to install a water heater in Singapore? 

The cost of installation of an instant water heater will average between $80 to $150. 

Q: What does the installation require? 

You will require both a water point and an electrical point for the instant water heater to work. 

Q: Where do I install my water heater? 

For an instant water heater, it will be installed in the bathroom next to your shower. It will be connected to water and electricity points. As it is compact, it can fit in almost any bathroom. 

rainshower and heater

A water storage heater, on the other hand, is bulky and heavy. You can install it in the bathroom ceiling and have a false ceiling to cover it from sight. 

For HDB Built-to-order flats, they usually have a designated place for the storage water heater. 

Q: How long will the installation take? 

Generally, instant water heaters are easier to install than storage water heaters. When I installed my instant water heater in our third bathroom, it took less than an hour. The handyman simply fixed the heater and shower on the wall. He then connected the electrical point via the ceiling so the switch for the heater could be placed outside the toilet. 

For a storage water heater, the installation will take longer as the handyman will need to connect the heater to 2 or more bathrooms, which means that the water pipes will have to be connected between the bathrooms. The storage water heater also usually requires a bracket to hold it up (if it is not standing). This process might take several hours. 

Replacing an old water heater would be more straightforward as the connections are already there. 

Q: Can I install my own water heater?

Unless you are an experienced plumber, the answer is no. Installing a water heater requires proper expertise and experience. A water heater involves both water and electricity, which can be unsafe if not properly installed. Always seek a highly-trained plumber or handyman to install your water heater. 

Q: How is a water heater installed? 

I will usually leave it to my professional plumber, but if you are curious, here are the steps to install a water heater.

  1. Turn off electrical power
  2. Remove old heater (if doing a replacement) 
  3. Disconnect supply cables and pipes
  4. Position new heater to match the water inlet
  5. Screw holes to hold up the heater
  6. Position and fix the heater on the wall, and connect it to the water inlet 
  7. Connect the electric supply and water supply to the new heater (if first time installation, this needs to be set up) 
  8. Check that it is filled with water, and switch on the power
  9. Test out the heater and check for any leakages

Q: How long does a water heater last? 

The life expectancy of an instant water heater is about 5 to 7 years. For a storage water heater, it should last about 10 years or more. Getting it properly installed will ensure that your water heater lasts long. 

For proper maintenance, flush the storage water heater every 5 years. For instant water heaters, check the wiring every 3 – 5 years. 

Q: When do I need to replace my water heater? 

If your water heater has turned yellow on the outside, or if you find problems with it, you can either get it repaired or replaced. 

Below are some common problems that you may face with old water heaters: 

  • Inconsistent water temperature: If the temperature of the water is inconsistent, there might be an issue with the thermostat. Do check with a plumber on this issue and do not try dismantling it yourself to check. 
  • Weird noises: If your water heater is making weird noises, it might be cause for concern. This might be due to sediments building up over the years. This will cause the heater to be inefficient and take more energy to heat the water. 
  • Water leakage: If your water heater is leakage, this might be due to cracks or loosened water piping. Do check with a plumber. 
  • Rusty: If the water coming out from your heater is brown or weirdly coloured, this could be a sign of rustiness inside the heater. Water heaters generally are noncorrosive, but overtime can deteriorate. If you find that the water is murky, do replace your water heater. 

Q: Should I replace my water heater? 

For an instant water heater, if it is past its life expectancy and has issues, I suggest getting it replaced as an instant water heater might cost the equivalent to repair. 

For your storage water heater, it depends on the problem as the cost will be higher. 

A replacement job will cost about $80 – $100 and might be more during weekends. 

A repair job will cost about $30 – $50 for transport and service fees. Depending on the severity of your problem and the materials required for repair, the cost will differ. If you choose not to repair, you will incur the transport and service fee. Usually, if you choose to repair, the transport and service fee will either be waived or subsidized into your total cost. 

Where to buy a water heater in Singapore

You used to only be able to buy a water heater from stores, but now you can purchase them online for the ultimate convenience and even enjoy discounted prices! Lazada is my go-to for shopping electronics. If you prefer to see the fridge in-person, you can always pop by to any of the consumer electronics stores like Best Denki, Courts, Harvey Norman and Gain City near you to check it out before purchasing online. 

Financing your home purchase

If you would like to take up a loan for your home purchases, consider a personal loan, as renovation loans do not give you the cash upfront. You can find the best personal loan suitable for you on Singsaver. 

We hope that our water heater Singapore guide will help you to buy the right water heater for your home. Do also read our other buying guides too. Please do share this along with your friends if you have found this useful. Do look forward to more buying guides that we will be releasing soon!

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