Single Phase Water Heater Solutions
Looking for an energy efficient electric water heating system for your home or workplace that’s easy to install? One that has no tank and no heating elements but comes with the latest technology? There’s never been a better time than now to check out the CFEWH Series Single Phase electric water heater from MicroHeat, with features including full digital control and ‘set and forget’ temperature regulation.
Single Phase – CFEWH Series 1-10
Single Phase instant hot water systems (CFEWH Series 1-10 units) only deliver power to heat up the water when the user wants it and are suitable for a range of uses.
The single unit CFEWH can be used for a range of applications, including: 
- Hand basins – Single and multiple
- Low flow shower (less than 5 LPM) – Save even more energy and water!
- Kitchenettes / laundrettes
- Boosting for existing hot water installation – Such as tanks or to increase water temperatures in a ring main at the point of use.
- Our products have been installed in homes, apartment complexes, offices, shopping centres, aged care facilities, hospitals, shops and all
other public and privately owned residences and buildings
The ‘Premium’ Single Phase instantaneous hot water unit can be set by the consumer/installer to deliver warm to hot water anywhere from 20°C to 50°C.
The ‘Standard’ Single Phase water heater unit is factory set to deliver up to 50°C, and water temperature is not consumer/installer settable.
Note: The CFEWH units can be settable above 50°C for specific applications, please contact us to discuss further for a special order.
Important: “Electric instantaneous water heaters may draw high levels of power, but only for relatively very short periods of time when compared to electric storage tank water heaters. The wiring rules accommodate this difference by applying a calculation where the power demand requirement can be reduced by as much as 66%.”
Refer: AS/NZS 3000:2018 Electrical installation (Wiring Rules), Appendix C, Circuit Arrangements.
Single Phase – Tandem CFEWH Series 1-20
Tandem Single Phase electric instantaneous hot water systems (CFEWH Series 1-20) simply combine two single phase units that operate in tandem to deliver a flow rate the equivalent of a Three Phase water heating system.
The Tandem CFEWH can be used for a range of applications in addition to the single installed unit, including:
- Hand basins – Multiple
- Showers
- Kitchens / laundries
- Boosting for existing hot water installation – Such as tanks, or to increase water temperatures in a ring main at the point of use
- Single bathroom dwellings
- Our products have been installed in homes, apartment complexes, offices, shopping centres, aged care facilities, hospitals, shops and all other public and privately owned residences and buildings
The ‘Premium’ Tandem Single Phase instant hot water unit can be set by the consumer/installer to deliver warm to hot water anywhere from 20°C to 50°C.
Note: The CFEWH units can be settable above 50°C for specific applications, please contact us to discuss further for a special order.
Important: “Electric instantaneous water heaters may draw high levels of power, but only for relatively very short periods of time when compared to electric storage tank water heaters. The wiring rules accommodate this difference by applying a calculation where the power demand requirement can be reduced by as much as 66%.”
Refer: AS/NZS 3000:2018 Electrical installation (Wiring Rules), Appendix C, Circuit Arrangements.
CFEWH SERIES Hot Water Output Temperatures/Flow Rate Tables
The incoming water temperature will vary during summer and winter. The following tables show the hot water flow rates at various inbound water temperatures for each of the Single Phase water heater models available.
| OUTPUT WATER TEMPERATURE 38°C | OUTPUT WATER TEMPERATURE 50°C | ||||
| Maximum Litres per minute with incoming water temperature | Maximum Litres per minute with incoming water temperature | ||||
| Incoming Water temp. | Series 1-10 240V 9.6kW | Series 1-20 240V 19.2kW | Series 1-10 240 V 9.6 kW | Series 1-20 240 V 19.2 kW | |
| 10°C | 4.9 | 9.8 | 3.4 | 6.8 | |
| 15°C | 6.0 | 12.0 | 3.9 | 7.8 | |
| 20°C | 7.6 | 15.2 | 4.6 | 9.2 | |
| 25°C | 10.6 | 21.0 | 5.5 | 11 | |
| 30°C | 17.2 | 21.0 | 6.9 | 13.8 |
| Technical Specifications | SINGLE PHASE | |
| CFEWH SERIES 1-10 | TANDEM CFEWH SERIES 1-20 | |
| Electrical Connection In accordance with AS/NZ 3000 electrical regulations | ||
| Power supply | Single Phase -L/N/G | Single Phase -L/N/G |
| Rated Power (kW) | Up to 9.6 kW | Up to 19.2 kW |
| Voltage (VAC) | 240 | 240 |
| Rated AMPS | 40 ( Hard Wired Circuit) | 80 (2 x 40A Hard Wired Circuits) |
| Frequency (Hz) | 50 / 60 | 50 / 60 |
| Unit Parameters | ||
| Max. temp. settable options °C | 50 or 60 °C | 50 or 60 °C |
| Switch on Flow Rate | 1.5 LPM | 1.5L LPM |
| System Type | Continuous Flow Electric Water Heater(CFEWH) - Electric Instantaneous / Tankless | |
| Max. Operating Line Pressure | 10 bar / 1 MPa | |
| Min. Operating Line Pressure | 1.5 bar / 0.15 MPa | |
| Dimensions | H 315 mm X W 210mm X D 120mm | |
| Heating Method | Optimized Direct Energy Transfer - Full Digital controlled water heating | |
| Nominal Capacity (ml) | 382 ml | 2 X 382 ml |
| Standards | ||
| Water Regualtion | WaterMark Licence WM-022136, AS/NZS 4020 & AS/NZS 3500* | |
| Electrical Safety | AS/NZS 60335.2.35 / IEC 60335.2.35 | |
| EMC | CE/C-Tick |
* In accordance with AS 3500 Section 1.9.2 and Section 1.9.3. No tempering or thermostatic mixing
valves are required for personal hygiene sanitary fixtures other than stipulated in Section 1.9.2 (a).
Installation instructions must be followed correctly as per CFEWH Installation manual.
Installation must conform to current electrical wiring and plumbing standards.