Single Phase Electric Instantaneous Water Heater – 8.5kW

6.3kW / 8.5kW Point of use
The 8.5kW Single Phase Instant Electric Hot Water Heater delivers efficient, on-demand hot water to multiple outlets, including kitchens and bathrooms. Designed for residential and light commercial applications, it heats water instantly without the need for storage, reducing energy consumption and eliminating standby heat loss.

Advanced electronic controls ensure consistent and comfortable hot water performance. The unit automatically adjusts power based on flow rate and inlet conditions, maintaining stable output even with fluctuations in pressure or temperature. With a compact, space-saving design and no requirement for flues, ventilation, or safe trays, it is ideal for installations where space and simplicity are key.

Efficient solution for lower-demand applications.

This Single Phase Instant Electric Hot Water heater supplies water to several water pick-ups, such as the kitchen and bathroom. Precision temperature control maximises energy efficiency while providing stable, comfortable hot water performance.

Rated Power
8.5kW
Power Supply
1 Phase
Temperature Range
30 - 50°

Ideal for:

Commercial Buildings Offices Factories & Industrial Education Facilities Healthcare Facilities
Model
Single Phase 8.5kW
Product No.
2850119
Type
Instantaneous
Voltage, V
230
Rated Power, kW
8.3
Rated Current, A
37
Hot Water Delivery, L/min (at ΔT=20°C)
5.5
Min. Flow Rate, L/min
2
Max Inlet Pressure Rating, kPa
750
Min Inlet Pressure Rating, kPa
100
Temperature Range, °C
30 - 50°C
Dimension, mm
280W x 505H x 60D
Weight, kg
5.4
IP Rating
IPX4
Water Connections
G1/2” Male
WaterMark Approval
WM 40394 (AS 3498)
Warranty
2 Years
WaterMark Certified WM 40394 (AS 3498)
  • Sleek and stylish finish, easily installed into tight spaces
  • Electronically controlled to maintain a consistent outlet temperature
  • Delivers water not exceeding 50°C in accordance with AS3498
  • Designed to support multi point-of-use applications
  • Automatic power adjustment based on flow rate compensates for variations in inlet water temperature and pressure
  • Electronic protection system combines temperature safety cut-off with intelligent flow control to ensure safe, reliable operation
  • No flue, ventilation or safe trays required

Frequently asked questions

An instantaneous (tankless) water heater heats water on demand as it flows through the unit, eliminating the need for a storage tank and reducing energy waste.

Yes. The 8.5kW model is designed to supply multiple outlets, such as kitchens, basins, and bathrooms, depending on demand and installation setup.

The unit delivers water between 30°C and 48°C, with a maximum temperature below 50°C in accordance with AS3498.

No. Because the unit limits outlet temperature to below 50°C, a tempering valve is not required (AS3498 compliant).

The heater uses electronic controls to automatically adjust power based on flow rate and incoming water temperature, maintaining a consistent outlet temperature.

The unit activates at a minimum flow rate of 2L/min. Below this, the heater will not operate.

Yes. Changes in inlet pressure and temperature can impact output, but the unit automatically compensates to maintain stable performance where possible.

This unit operates on 220–240V single phase power and must be hardwired by a licensed electrician.

The unit must be installed indoors, in a frost-free environment, mounted vertically on a wall close to the outlet for best performance.

No. As an electric instantaneous system, it does not require flues, ventilation, or gas connections.

No. The unit is not designed to provide heated potable (drinking) water.

Minimal maintenance is required. Regular inspection is recommended, and descaling may be needed in areas with hard water to prevent performance issues.

On This Page

OVERVIEW

Efficient solution for lower-demand applications.

This Single Phase Instant Electric Hot Water heater supplies water to several water pick-ups, such as the kitchen and bathroom. Precision temperature control maximises energy efficiency while providing stable, comfortable hot water performance.

Rated Power
8.5kW
Power Supply
1 Phase
Temperature Range
30 - 50°

Ideal for:

Commercial Buildings Offices Factories & Industrial Education Facilities Healthcare Facilities

SPECIFICATIONS

Model
Single Phase 8.5kW
Product No.
2850119
Type
Instantaneous
Voltage, V
230
Rated Power, kW
8.3
Rated Current, A
37
Hot Water Delivery, L/min (at ΔT=20°C)
5.5
Min. Flow Rate, L/min
2
Max Inlet Pressure Rating, kPa
750
Min Inlet Pressure Rating, kPa
100
Temperature Range, °C
30 - 50°C
Dimension, mm
280W x 505H x 60D
Weight, kg
5.4
IP Rating
IPX4
Water Connections
G1/2” Male
WaterMark Approval
WM 40394 (AS 3498)
Warranty
2 Years

APPROVALS & CERTIFICATIONS

WaterMark Certified WM 40394 (AS 3498)

FEATURES

  • Sleek and stylish finish, easily installed into tight spaces
  • Electronically controlled to maintain a consistent outlet temperature
  • Delivers water not exceeding 50°C in accordance with AS3498
  • Designed to support multi point-of-use applications
  • Automatic power adjustment based on flow rate compensates for variations in inlet water temperature and pressure
  • Electronic protection system combines temperature safety cut-off with intelligent flow control to ensure safe, reliable operation
  • No flue, ventilation or safe trays required

FAQS

Frequently asked questions

An instantaneous (tankless) water heater heats water on demand as it flows through the unit, eliminating the need for a storage tank and reducing energy waste.

Yes. The 8.5kW model is designed to supply multiple outlets, such as kitchens, basins, and bathrooms, depending on demand and installation setup.

The unit delivers water between 30°C and 48°C, with a maximum temperature below 50°C in accordance with AS3498.

No. Because the unit limits outlet temperature to below 50°C, a tempering valve is not required (AS3498 compliant).

The heater uses electronic controls to automatically adjust power based on flow rate and incoming water temperature, maintaining a consistent outlet temperature.

The unit activates at a minimum flow rate of 2L/min. Below this, the heater will not operate.

Yes. Changes in inlet pressure and temperature can impact output, but the unit automatically compensates to maintain stable performance where possible.

This unit operates on 220–240V single phase power and must be hardwired by a licensed electrician.

The unit must be installed indoors, in a frost-free environment, mounted vertically on a wall close to the outlet for best performance.

No. As an electric instantaneous system, it does not require flues, ventilation, or gas connections.

No. The unit is not designed to provide heated potable (drinking) water.

Minimal maintenance is required. Regular inspection is recommended, and descaling may be needed in areas with hard water to prevent performance issues.

Case studies