The EHS Flex 24kW Three Phase Electric Combi Boiler (24000C Flex) – ALC-3PCO-24F is a compact, modern electric combi boiler designed to provide reliable central heating and instant domestic hot water without requiring a flue or gas supply. With a range-rated output of 12kW to 24kW, the boiler can be adjusted to suit the property's heating requirements and hot-water demand.
Designed for three-phase electrical installations, the EHS Flex 24kW combines on-demand hot water, quiet operation and a compact wall-mounted design. Its minimal moving parts help simplify servicing, while the no-flue configuration provides greater flexibility when selecting an installation location. It can also be used with suitable controls and energy strategies such as time scheduling, tariff optimisation and solar PV usage.
24kW Electric Combi
Three Phase
Instant Hot Water
5-Year Warranty
12–24kW Range Rated
Adjustable heating output to match property requirements.
Up to 12 L/min DHW
Instant domestic hot water without a separate cylinder.
400V Three Phase
Designed for higher-output three-phase electric installations.
630 × 380 × 230mm
Compact wall-mounted dimensions for flexible installation.
Applications & suitability
Residential Heating
Suitable for homes requiring electric central heating and instant domestic hot water.
Higher-Output Electric Installations
The three-phase 24kW configuration is suited to higher-output electric heating requirements.
Radiators & Underfloor Heating
Can work with existing radiators and compatible underfloor heating systems, subject to correct system design and sizing.
Flexible Siting
The no-flue design allows installation in suitable kitchens, utility rooms, loft spaces or plant rooms.
Key specifications
| Brand |
EHS (Electric Heating Systems) |
| Range / Family |
Flex |
| Product Code (MPN) |
ALC-3PCO-24F |
| Model Name |
24000C Flex |
| Boiler Type |
Electric Combi Boiler |
| Heating Output (Range Rated) |
12kW to 24kW |
| Electrical Supply |
Three Phase |
| Voltage |
400V |
| Current |
36A |
| Recommended Breaker |
40A (TP) |
| Recommended Cable Size |
3 × 6mm² |
| DHW Flow Rate |
Up to 12 L/min |
| Maximum Heating Pressure |
2.5 bar |
| Minimum Heating Pressure |
0.5 bar |
| Maximum Flow Temperature |
80°C |
| Minimum Flow Temperature |
20°C |
| DHW Connections |
1/2" Male Connector |
| Heating Connection Size |
3/4" Male Connectors |
| PRV Connection Size |
15mm |
| Dimensions |
H630 × W380 × D230mm |
| Warranty |
5 Years (Subject to T&Cs) |
Installation & compatibility
The EHS Flex 24000C is a three-phase electric combi boiler designed for installations with a suitable 400V electrical supply. The no-flue design provides flexible siting, while the wall-mounted format helps make efficient use of available installation space. Electrical installation should be completed using the specified electrical requirements and by a suitably qualified professional.
Design & performance benefits
Range-Rateable Output
The 12–24kW range allows the heating output to be matched to the property's requirements.
Instant Domestic Hot Water
Combi operation provides domestic hot water on demand without requiring a separate hot-water cylinder.
No-Flue Installation
The electric design eliminates the need for a conventional boiler flue and gas supply.
Compact Wall-Mounted Design
Measuring 630 × 380 × 230mm, the compact design supports flexible installation.
Additional installation features
Three-Phase Supply
Designed for a 400V three-phase electrical supply with a specified 36A current.
Flexible Controls & Tariffs
Can support time scheduling and tariff optimisation when paired with suitable controls.
Renewable Strategies
Can be paired with suitable renewable strategies, including solar PV usage.
Ideal for
The EHS Flex 24kW Three Phase Electric Combi Boiler is ideal for properties requiring a higher-output electric heating and hot-water solution without a gas supply or flue. Its range-rated 12–24kW output, three-phase 400V supply, instant DHW capability and compact wall-mounted design make it suitable for homes moving towards electric heating, subject to correct electrical provision, system design and installation requirements.
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Customers can also choose to collect their order from our store in
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