Biasi | Part No: BIPROELEC14C | Series: Pro-Electric
The Biasi Pro-Electric 14kW is a wall-mounted single phase electric combi boiler designed as a direct, drop-in replacement for a gas combi boiler — using the same pipework connections, the same radiators, and the same controls wiring. No flue is required, there is no combustion, no gas supply, no condensate drain, and no carbon monoxide risk. It can be sited anywhere in the property where the electrical supply can be run.
At 14kW on a single phase 230V supply it delivers continuous domestic hot water at up to 7 litres per minute and provides full central heating output from 2kW to 14kW with automatic power modulation — adjusting its output to match demand rather than cycling on and off at full power. For single-bathroom flats, apartments, or smaller properties without a gas connection, the Pro-Electric 14kW single phase is the practical electric heating solution that works within the constraints of a standard domestic electricity supply.
⚡ 14kW Single Phase
🔥 Heating + Hot Water
🚿 7 L/min DHW
🏠 No Flue Required
♻️ ~100% Efficient
🛡️ 3-Year Warranty
What's Included in This Bundle
- Biasi Pro-Electric 14kW Single Phase Combi Boiler (BIPROELEC14C) — pre-wired, with integrated pump, 5-litre expansion vessel, pressure gauge, safety valve, and touchscreen control panel
- Installation manual and mounting fixings
Key Features & Benefits
No Flue, No Gas, No Condensate — Install Anywhere
Unlike gas boilers, the Pro-Electric produces no combustion gases and requires no flue penetration through the external wall. This removes one of the biggest constraints in boiler placement: you are no longer limited to locations where a flue can be routed. The boiler can be installed in an internal cupboard, a bathroom, a hallway, or any other suitable wall position — anywhere that a suitably sized electrical cable can be run to. No condensate trap or drain connection is needed. No gas safety certificate is required. Installation is by a qualified electrician or heating engineer following Biasi's installation regulations and Part P.
Direct Replacement for a Gas Combi — Same Pipework
The Pro-Electric connects to the same 22mm and 15mm pipework used by a standard gas combi boiler: ¾" male for heating flow and return, ½" male for domestic hot water inlet and outlet. In a gas-to-electric conversion, the existing pipework, radiators, TRVs, and room thermostat wiring can all remain in place. Only the boiler itself and the electrical supply need to change. This dramatically reduces the time and disruption of conversion compared to switching to a different type of heating system.
Power Modulation from 2kW to 14kW
The Pro-Electric does not operate at fixed on/off switching between zero and full power. It modulates its electrical heating output between 2kW and 14kW to match the heating demand at any given time. In mild weather, when a small amount of heat is needed to maintain temperature, it will run at low power rather than cycling at full power — reducing electricity consumption and extending the life of the heating elements. This modulation is managed automatically by the control board based on the target flow temperature and current water temperature.
Domestic Hot Water: Up to 7 Litres per Minute
The 14kW model delivers continuous domestic hot water at up to 7 litres per minute. At this flow rate with a standard UK incoming cold water temperature of 10–15°C, the boiler provides a temperature rise of approximately 28–33°C — sufficient for a shower (typically 6–9 L/min) and a hand basin simultaneously, or for a dedicated shower at comfortable temperature. This output is appropriate for a 1–2 person household with one bathroom. For households with higher simultaneous demand — multiple bathrooms, or a bath — the three-phase 25kW Pro-Electric or a system boiler with cylinder is more suitable.
~100% Efficient — All Electrical Input Becomes Heat
Resistive electric heating converts electrical energy to heat at close to 100% efficiency: there are no flue losses, no standby heat losses from a pilot flame, and no heat lost through the casing. Every kilowatt-hour drawn from the electricity supply goes into heating the water. This contrasts with gas condensing boilers, which achieve 89–94% seasonal efficiency in practice. The efficiency comparison with gas depends on the relative cost per kWh of electricity versus gas — electric heating costs more per unit of heat on standard tariffs — but the unit efficiency figure itself is essentially 100%. When combined with an Economy 7/10 or EV tariff, time-of-use pricing, or solar generation with a myenergi eddi diverter, the running cost differential narrows significantly.
Integrated Components — Compact, Pre-Plumbed Unit
The 14kW combi body incorporates the circulation pump (≥230W, 10-metre head), the 5-litre expansion vessel, the pressure gauge, the 3-bar safety valve, the DHW flow switch, the heating flow switch, and the heating element with dual overheat protection thermostats (105°C/60A and 110°C/10A for DHW; 140°C/60A for heating). Two temperature probes (NTC 50K) monitor flow temperature. The DHW circuit uses a dedicated SCR-controlled DHW heating element separate from the heating element, providing true combi performance rather than a stored preheat or diversion arrangement.
Touchscreen Control Panel with 24-Period Timer
The display panel provides: winter/summer mode switching (heating off in summer, DHW active); 24-period daily timing with per-period temperature setting; separate temperature setpoints for radiator mode (30°C–80°C), floor heating/UFH mode (30°C–60°C), and domestic hot water (30°C–60°C); heating return differential setting (5°C–30°C, default 15°C); antifreeze mode; child lock; room thermostat input; fault code display with reset. The clock and week-day settings enable fully automated heating schedules without an external programmer, though an external room thermostat or smart thermostat is still recommended for optimum comfort and efficiency.
Quiet — Near-Silent Operation
Without a combustion fan, gas valve, ignition electrode, or flue-gas condensing heat exchanger, the Pro-Electric has far fewer noise-generating components than a gas boiler. Operation is dominated by the circulation pump and the thermal expansion/contraction of water in the pipework. No combustion noise, no ignition click, and no flue draft noise. The boiler is rated IPX4 (splash-proof) for installation in rooms with a bath or shower, subject to the relevant zone requirements under BS 7671.
Technical Specifications
| Parameter |
Value |
| Rated Output |
14kW |
| Minimum Output (Modulation) |
2kW |
| Phase / Voltage |
Single phase 230V ~ 50Hz |
| Min. Supply Cable Size |
≥10mm² copper core |
| Min. MCB / ELCB Rating |
≥80A (MCB); ≥80A (ELCB/RCD) |
| Boiler Type |
Combi (instantaneous DHW + central heating) |
| DHW Max. Flow Rate |
7 litres per minute (at ≤30°C temperature rise) |
| DHW Temperature Range |
30°C – 60°C (adjustable) |
| Heating Flow Temp (Radiator Mode) |
30°C – 80°C (adjustable) |
| Heating Flow Temp (UFH / Floor Mode) |
30°C – 60°C (adjustable) |
| Max. Heating Pressure |
2.5 bar |
| Safety Valve Setting |
3 bar |
| Recommended System Pressure (Cold) |
1.0 – 1.5 bar |
| Expansion Vessel (Integrated) |
5 litres |
| Integrated Pump |
Yes — ≥230W, 10-metre head |
| Heating Connections (Flow & Return) |
¾" BSP male |
| DHW Connections (Cold In & Hot Out) |
½" BSP male |
| PRV Discharge Connection |
15mm compression |
| IPX Rating |
IPX4 (splash-proof) |
| Flue Required |
No |
| Gas Connection Required |
No |
| Efficiency |
~100% (resistive electric — all input converted to heat) |
| Mounting Orientation |
Upright only; wall-hung (M8×70 expansion fixings) |
| Part Number |
BIPROELEC14C |
⚠️ Critical Electrical Requirements — 14kW Single Phase
At 14kW on a 230V single phase supply, the full-load current is approximately 61A. The installation manual specifies a minimum cable size of ≥10mm² copper core and a minimum MCB and ELCB/RCD rating of ≥80A. This is a dedicated circuit requirement — the boiler cannot share a circuit with other appliances. Before purchasing, confirm that the property's incoming supply and consumer unit can accommodate an 80A dedicated circuit. Older properties with a 60A or 80A main fuse may require an upgrade by the distribution network operator before this boiler can be installed at full rated output. A Part P electrical installation certificate must be issued immediately after the live connection is made. Failure to obtain this certificate will invalidate the warranty.
Installation Requirements
| Requirement |
Detail |
| Supply cable |
≥10mm² copper core (increase for longer runs; consult BS 7671 voltage drop tables) |
| MCB / ELCB rating |
≥80A — dedicated circuit only |
| Wiring connections |
L (Live), N (Neutral), E (Earth) to terminal block. Pre-wired internally — connect to terminal block only |
| System flushing |
BS 7593:2006 — flush both cold and hot before commissioning to remove installation debris |
| Magnetic filter |
Must be fitted on heating return — failure to do so will affect warranty |
| Automatic bypass valve (ABV) |
Must be fitted — confirms minimum flow when zone valves or TRVs are restricting the circuit |
| Filling loop |
WRAS-approved filling loop must be used |
| Relevant standards |
BS EN 12828, BS EN 12831, BS EN 14336, BS 7671 (IEE Wiring Regs), BS 7593 |
| Part P certificate |
Required immediately after live connection — warranty invalid without it |
| Warranty registration |
Must be completed within 45 days of purchase |
| Annual service |
Required by a registered electrician to maintain warranty |
Warranty
| Duration |
3 years |
| Registration deadline |
Within 45 days of purchase |
| Conditions |
Part P certificate issued; magnetic filter fitted; annual service by registered electrician recorded; warranty covers manufacturing defects only — not damage by human error or external causes |
Frequently Asked Questions
Can I install the Biasi Pro-Electric 14kW combi myself, or does it need a qualified engineer?
The electrical connection must be made by a qualified electrician, and a Part P electrical installation certificate must be issued immediately after the live connection. The plumbing connections — fitting the boiler to the existing pipework, commissioning the system, flushing and checking pressures — should be carried out by a qualified heating engineer or plumber familiar with sealed heating systems. Both trades should complete the plumber's checklist and electrician's checklist in the installation manual. Attempting self-installation by an unqualified person will invalidate the warranty and the Part P requirement.
Will a 14kW single phase boiler run a bath?
A standard UK bath holds around 150–180 litres. At the Pro-Electric 14kW's maximum DHW flow rate of 7 litres per minute, filling a bath to 150 litres takes approximately 21 minutes at full flow — during which the boiler is running at full 14kW continuously. While technically possible, running a bath from a 14kW combi boiler is slow compared to a gas combi or a stored-water system, and it prevents simultaneous use of other hot water outlets. For households that regularly run baths, or have multiple bathrooms, the three-phase 25kW Pro-Electric (which delivers up to 12 litres per minute) or a system boiler with a suitably sized unvented cylinder is the more appropriate choice.
Does this boiler work with underfloor heating?
Yes. The Pro-Electric has a dedicated floor heating (UFH) mode in its control panel, which limits the maximum flow temperature to 60°C (against 80°C in radiator mode). This protects the UFH manifold and floor construction from excessive temperatures. For a wet UFH system, the boiler flow temperature should typically be set to 35–50°C depending on the system design — the control panel allows any temperature between 30°C and 60°C in floor mode. An external room thermostat or UFH controller can be connected to the room thermostat input terminals to provide demand-led control rather than relying solely on the boiler's internal timer.
How does the 14kW single phase compare to the 14kW three phase Pro-Electric?
Both variants produce 14kW of heating output and the same 7 litres per minute maximum DHW flow rate — the output and comfort performance are identical. The difference is entirely in the electrical supply requirements: the single phase 230V version draws approximately 61A on a single phase and requires a ≥10mm² cable and ≥80A MCB. The three phase 400V version distributes the same load across three phases at approximately 20A per phase, requiring a smaller cable (≥4mm²) per phase and a 30A MCB. The three phase version is easier to cable over long runs and places less strain on a single phase supply — making it preferable in properties where a three phase supply is available, in newer flat developments, or in commercial premises. For a standard UK domestic property with a single phase meter, the single phase version is the correct choice.
What room thermostat or smart thermostat is compatible with the Pro-Electric?
The Pro-Electric accepts a standard 2-wire on/off room thermostat demand signal at its room thermostat input terminals — the same wiring arrangement used by any standard gas boiler. This means any conventional wired room thermostat (such as a Drayton or Honeywell wired model) or smart thermostat with a wired relay output (such as the Drayton Wiser, Hive, Tado, or Nest — when wired rather than wireless relay) can be connected directly. Wireless receivers that provide a volt-free switched output are also compatible. The internal timer can be used alongside, or instead of, an external thermostat for basic scheduling without additional cost.
Related Products: Biasi Pro-Electric 14kW 3-Phase Combi | Biasi Pro-Electric 25kW 3-Phase Combi | Biasi Pro-Electric System Boiler Range | Drayton Wiser Smart Thermostat Kit | Magnetic Heating System Filter | myenergi eddi Solar Diverter
