Where to Buy a Water Heater in Singapore
ThatRenoStore sells storage and instant water heaters online across Singapore, with 27 models live today from $120.05. The listings publish the figures that decide the job: tank capacity, power rating, tank diameter, warranty and, on several models, the Safety Mark number. Order online and it is delivered across Singapore.
Two decisions come before price. First, storage or instant. A storage heater holds a tank of hot water and suits a bathroom used by several people back to back. An instant heater heats on demand and takes no ceiling space. Second, and the one people miss: whether the tank physically fits the space above your false ceiling.
Tank diameter is the constraint nobody measures
The Ariston PRO R S range is listed in two diameters, Regular at 450mm and Slim at 353mm. That 97mm difference is what decides whether a 30-litre tank goes into a tight HDB service void or has to be surface mounted. Check the ceiling void before you choose capacity, because a larger tank in the wrong diameter will not go in.
Storage heaters compared
| Model | Capacity | Published specification | Price |
|---|---|---|---|
| Ariston PRO R S 30SHE SIN3 | 30 litres | 3kW, 230V, max 65°C, max working pressure 8 bar, heat-up 26 min at 35°C rise, 0.74 kWh per 24h standby, 13kg, Safety Mark 130148-11, 5 year tank warranty | $270.71 |
| 707 Kensington+ 25L | 25 litres | Blue enamel coated tank and heating element, IPX1 splash proof, thermal cut off, Whirlflow 2, multi-position installation, 10 year tank warranty plus 2 years on parts and service | $270.00 |
| 707 Kensington+ 35L | 35 litres | Same Kensington+ feature set in a larger tank | $285.00 |
| 707 Dalton 15 | 15 litres | Compact storage unit for a single bathroom | $233.05 |
| Ariston PRO RS J 25 3.0SIN | 25 litres | 3.0kW class storage heater | $251.88 |
Prices and specifications verified live on 30 August 2026.
Warranty is where the two brands separate
The 707 Kensington+ listing states a 10 year warranty on the tank, with 2 years on parts and 2 years on service. The Ariston PRO R S 30SHE listing states 5 years on the tank. Both are around $270, so the warranty term is the clearest difference between them at that price, and it is worth reading before you decide on capacity alone.
Instant heaters
Instant units start lower and take no ceiling space. The Ariston Aures SB33 is $120.05 and the Aures SM33 SB is $148.30. The Aures SM33 SB publishes 230V, a 2 litre per minute minimum flow, a 0.3 bar minimum water pressure, an IP25 ingress rating and a 5 year warranty on the heating element. Minimum pressure matters on high floors, so check it against your supply.
What a water heater costs
| Price band | Live models |
|---|---|
| Under $300 | 13 |
| $300 to $450 | 11 |
| $450 and above | 3 |
The three bands sum to 27, which is every water heater live on the site on 30 August 2026.
Read next
- 707 vs Ariston storage water heaters: tank size, warranty and price compared
- Instant shower heaters: power, pressure and IP rating
- Where to buy bathroom fixtures in Singapore
- What to buy for a BTO bathroom
Frequently asked questions
Where can I buy a water heater online in Singapore?
ThatRenoStore sells storage and instant water heaters online across Singapore, with 27 models live today from brands including 707 and Ariston. Capacity, power rating and warranty are published on each listing, and orders are delivered across Singapore.
How much does a water heater cost in Singapore?
Of the 27 water heaters live on ThatRenoStore, 13 are under $300, 11 fall between $300 and $450, and 3 are $450 or above. The lowest-priced live model is the Ariston Aures SB33 instant heater at $120.05. Prices were checked on 30 August 2026.
Should I buy a storage or an instant water heater?
A storage heater holds heated water in a tank and suits a bathroom used by several people in succession. An instant heater heats water on demand, costs less to buy and needs no ceiling space, but depends on your incoming water pressure. The Aures SM33 SB lists a 0.3 bar minimum.
What size water heater do I need for an HDB bathroom?
Capacity is only half the question. The Ariston PRO R S range is listed in a 450mm Regular diameter and a 353mm Slim diameter, and the ceiling void decides which one fits. Measure the void first, then pick capacity: 15 to 25 litres for one bathroom, 30 litres and up for heavier use.
How long does a storage water heater take to heat up?
The Ariston PRO R S 30SHE SIN3 publishes a heating time of 26 minutes for a 35 degree temperature rise, and a standby heat loss of 0.74 kWh per 24 hours. Not every listing publishes these figures, so check the specification block on the model you are considering.
What warranty comes with a water heater?
It varies by model and is stated on each listing. The 707 Kensington+ 25L lists a 10 year tank warranty with 2 years on parts and service. The Ariston PRO R S 30SHE SIN3 lists 5 years on the tank. Both sit at roughly $270.
Start browsing
Shop water heaters at ThatRenoStore. Every model is priced on the page and delivered across Singapore.