Mini Digital Water Heater

Technology creates the perfect solution for tiny spaces and high hot water demands.

MAX Heating Technology

Small but incredibly powerful.
Produces 6 times its capacity of warm water.

Leading American Technology

A. O. Smith has been refining water heating technology for the last 140 years. Every A. O. Smith heater is equipped with cutting edge, patented technology. Other heaters may look like A. O. Smith heaters but they do not work the same way.

Built to Last

A. O. Smith’s patented Blue Diamond formula makes its water heater tanks the toughest and most durable tanks in the market.

The longest lasting heater in the world was made by A. O. Smith.

No OEM Factories

Other manufacturers use OEM factories so they can give you cheaper products, but every A. O. Smith water heater and its components are manufactured in-house.

3 Year Full Warranty

Other heaters only provide full warranties for one year. All A. O. Smith products are fully guaranteed for 3 years – parts and labor, making us the longest water heater warranty provider in Singapore.


  • Temperature controls
  • MAX heat
  • Instant heat
  • Built in timer
  • Blue Diamond™ tank

Produces 6 times its capacity of hot water.

Digital heaters heat water differently.
Technology allows small to be powerful too.

A digital timer ensures your water heater goes into energy saving mode when not in use.

► Built in timers

The internal circuit board records 21 days of your family’s water usage patterns.

Your family data is analyzed to find the most
efficient water heating sequence.


► Automatic Timer (AES)

Patented 24k gold heating elements have such high performance, they heat water almost instantly

► 24K gold elements

Other Features

Blue Diamond™ Tank

Patented tank lining makes A. O. Smith heaters the toughest in the market.

Temperature Controls

Adjust your water heater temperature to heat less so you can save more.

Blue Diamond™ Element

A. O. Smith manufactures in-house elements of the highest heating efficiency.

Instant Heating

A patented heating sequence gives you hot water without you having to wait.

High Density Insulation

Reduce standby heat loss and lower energy costs.

Model Length (mm) Width (mm) Height (mm)
EWH-40 880 340 350
Product Specifications
Rated volume (L) 40
Power (kW) 5.0
Voltage/frequency (V/Hz) 220~/50
Temperature range (°C) 35 – 75 ± 5
Rated water pressure (MPa) 0.8
Inlet/outlet connection (inches) ½
Waterproof grade IPX4
Net weight (kg) 21