Micro Heat Pump Water Heater

The first micro heat pump in the world. Pulls in free ambient heat to heat water.

So small it fits into your apartment.

Micro Heat Pump Technology

The latest green technology saves over 75% of energy. And its the smallest of its kind in the world.

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.

Highest Efficiency Heat Pumps

Energy Factor (EF) is a measure of overall efficiency.

A. O. Smith technology has been refined to produce the highest efficiency heat pumps in the market.

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.


  • Micro heat pump
  • Temperature controls
  • MAX heat
  • Instant heat
  • Built in timer

Heat Pump technology can reduce your energy cost by over 75%.

Save up to $600 a year.

Regular heaters run at 3000 watts.
Micro heat pumps run at 210 watts.

▸ Heat pump Technology

Heat pumps are up and running all the time.

They work when it is cloudy.
They work when it is hazy.
They work when it rains.

Save money. Year after year.

Fitted with Blue Diamond™ tank technology, every A. O. Smith heat pump is built to last you for years.

▸ Blue Diamond Technology

Other Features

MAX Heating

Digital water heating is more than twice as powerful as standard heating.

Automatic Timer (AES)

Records your usage patterns and heats water in the most energy efficient method.

Blue Diamond™ Element

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

Temperature Controls

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

High Density Insulation

Reduce standby heat loss and lower energy costs.

Instant Heating

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

Built In Timer

System goes into energy saving mode on its own. No need to turn your heater off and on.

Model Length (mm) Width (mm) Height (mm)
HPW-60A 837 465 473
HPW-80A 992 465 473
Product Specifications
Rated volume (L) 60 80
Power, heat pump mode (kW) 0.21 0.21
Power, electric mode (kW) 3.2 3.2
Voltage/frequency (V/Hz) 230~/50 230~/50
Temperature range (°C) 35 – 75 ± 5 35 – 75 ± 5
Max/min ambient temperature (°C) 10 – 44 ± 5 10 – 44 ± 5
Noise level (dB) ≤ 40 ≤ 40
Rated tank, inlet/outlet pressure (MPa) 0.8 0.8
Inlet/outlet connection (inches) ½ ½
Waterproof grade IPX4 IPX4
Net weight (kg) 42 45