The Story
The EHC Comet PV 14.4kW/200L Electric Boiler & Indirect Cylinder Package (EHCEPV14.4/200IND) pairs a multi-output electric system boiler, field-configurable across 7.2 / 9.6 / 12.0 / 14.4kW, with a 200-litre Neptune Indirect Unvented Stainless Steel Cylinder. Supplied as a matched heat pack from The Electric Heating Company, it is designed as a single-source solution for wet central heating, underfloor heating, and domestic hot water in properties without mains gas — with Solar PV integration, weather compensation, and optional Smart App control built in as standard.
Qualified Installation Required
This boiler must be installed, commissioned, and electrically connected by a qualified electrician in accordance with BS7671. The unvented cylinder is a controlled service under Building Regulation G3 (England & Wales), Technical Standard P3 (Scotland), or Building Regulation Part F (Northern Ireland) and must only be fitted by a competent, G3-qualified installer. A magnetic filter must be fitted to the boiler — failure to do so will invalidate the manufacturer's warranty.
Solar PV & Smart Control Ready
The boiler's FN input can be wired directly to a solar PV inverter's load-management relay, allowing surplus generation to be diverted into space heating or the cylinder's domestic hot water (up to 60°C) instead of exporting to the grid. Adding the optional C.MI2 Internet Module (AHP1004) unlocks remote app control, while the C.MG3 Heating Zone Control Module (EC10018) allows the boiler to manage multiple heating circuits — for example underfloor heating and radiators — at independent temperatures.
Nominal 200L / Actual 210L Cylinder Capacity
This package is sold under EHC's "200L" product designation (MPN EHCEPV14.4/200IND), but the Neptune Indirect cylinder supplied is the manufacturer's 210-litre model — the nearest cylinder size in the Neptune Indirect range, with a listed capacity of 210 litres on EHC's own technical data sheet. Dimensions and performance figures on this page reflect that 210L unit. Please confirm the exact cylinder footprint against the site survey before ordering.
Field-Configurable Output
A single boiler chassis covers 7.2, 9.6, 12.0, or 14.4kW via an on-board DIP switch, so installers can right-size the heat output to the building's calculated heat loss without stocking multiple boiler models.
Faster DHW Recovery
The Neptune Indirect cylinder uses a 0.86m² coil with a 23.08kW rating, giving a full heat-up time of around 33 minutes and a 70% reheat in roughly 26 minutes — markedly quicker than an equivalent direct (immersion-only) cylinder.
Weather Compensation
An outdoor temperature sensor (Tos) lets the boiler's controller adjust flow temperature to a selectable heating curve, reducing energy use during milder weather while maintaining comfort during cold snaps.
Automatic Anti-Legionella Cycle
A configurable disinfection routine raises cylinder temperature to a set point on a chosen day and time, addressing Legionella risk without requiring manual intervention.
Backup Immersion Heating
The cylinder's 3kW Incoloy immersion element, rated 45–65°C with an 85°C high-limit cut-out, provides electric backup water heating independent of the boiler's primary circuit.
Cascade & Multi-Zone Capable
Up to 32 Comet PV boilers can be linked via RS485 bus into a cascade for higher-demand installations, and the boiler's three-way valve control supports simultaneous space heating and DHW priority logic.
| Boiler — General | |
| Model / MPN | EHCEPV14.4/200IND |
| Boiler range | Comet PV Model 2 (7.2 / 9.6 / 12.0 / 14.4kW, field-selectable) |
| Rated output (this package) | 14.4kW |
| Heating medium | Water or antifreeze-treated water, closed-loop or open-loop forced circulation |
| Intended use | Domestic or light commercial wet central heating, underfloor heating, and indirect DHW |
| Boiler dimensions (H x W x D) | 716 x 316 x 235mm |
| Boiler weight | ≈20.5kg |
| Boiler connections | G3/4" (inside thread) |
| Safety class | IP22 |
| Boiler — Electrical | |
| Rated voltage | 240V 1N~ (single phase) |
| MCB rating | 63A |
| Load current | 60.0A |
| Min. power supply cable c.s.a.* | 10mm² |
| Max. power supply cable c.s.a. | 16mm² |
| Max. allowed network impedance | 0.22Ω |
| RCD protection | 30mA Residual Current Device required on supply |
| Boiler — Hydraulic | |
| Outlet flow temperature range | 20 – 85°C |
| Max. medium temperature | 100°C |
| Max. system pressure | 0.3MPa (3 bar) |
| Min. system pressure | 0.05MPa (0.5 bar) |
| Built-in expansion vessel | 5 litres, 1.5 bar pre-charge |
| Minimum flow rate | 3.5 l/min (models to 8kW) / 4.5 l/min (models above 8kW) |
| Cylinder — Neptune Indirect (210L unit, sold as 200L) | |
| Construction | Duplex stainless steel, TIG welded, 15 bar factory pressure tested |
| Insulation | CFC- and HCFC-free polyurethane foam |
| Cylinder capacity | 210 litres (nominal listing: 200L) |
| Dimensions (H x Diameter) | 1469 x 550mm (cased unit) |
| Weight empty / full | 50kg / 260kg |
| Indirect coil surface area | 0.86m² |
| Indirect coil water content | 4.83 litres |
| Indirect coil rating | 23.08kW |
| Heat-up time (cold to set point) | ≈33 min 05 sec |
| 70% reheat time | ≈26 min 16 sec |
| Standing heat loss | 1.58kWh/24hr (ErP band C, 66W standing loss) |
| Secondary return boss | Fitted as standard |
| Hot draw-off / cold feed / secondary return | 22mm compression connections |
| Cylinder — Immersion Heater & Pressure | |
| Immersion element | 3kW, 240V, Incoloy, 1¾" BSP thread |
| Immersion fuse requirement | 13A via double-pole isolating switch |
| Element control thermostat range | 45 – 65°C |
| Element high-limit cut-out | 85°C |
| Max. inlet mains water pressure | 12 bar |
| Operating pressure | 3.0 bar |
| Expansion vessel charge pressure | 3.0 bar |
| Expansion valve opening pressure | 6.0 bar |
| T&P relief valve opening | 7.0 bar / 90°C |
| Max. primary (boiler) circuit pressure | 3.5 bar (indirect coil, sealed system) |
| Warranty | |
| Boiler warranty | 2 years parts & labour, subject to registration within 60 days and annual servicing |
| Cylinder warranty | 2 years parts & labour from commissioning, subject to registration within 30 days |
| Cylinder stainless steel inner vessel | 25-year guarantee (domestic installations) |
*Minimum permitted cable size; actual installation cable size must be calculated by a qualified electrician per BS7671, accounting for cable type and installation method.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The EHC Comet PV 14.4kW/200L Electric Boiler & Indirect Cylinder Package (EHCEPV14.4/200IND) pairs a multi-output electric system boiler, field-configurable across 7.2 / 9.6 / 12.0 / 14.4kW, with a 200-litre Neptune Indirect Unvented Stainless Steel Cylinder. Supplied as a matched heat pack from The Electric Heating Company, it is designed as a single-source solution for wet central heating, underfloor heating, and domestic hot water in properties without mains gas — with Solar PV integration, weather compensation, and optional Smart App control built in as standard.
Qualified Installation Required
This boiler must be installed, commissioned, and electrically connected by a qualified electrician in accordance with BS7671. The unvented cylinder is a controlled service under Building Regulation G3 (England & Wales), Technical Standard P3 (Scotland), or Building Regulation Part F (Northern Ireland) and must only be fitted by a competent, G3-qualified installer. A magnetic filter must be fitted to the boiler — failure to do so will invalidate the manufacturer's warranty.
Solar PV & Smart Control Ready
The boiler's FN input can be wired directly to a solar PV inverter's load-management relay, allowing surplus generation to be diverted into space heating or the cylinder's domestic hot water (up to 60°C) instead of exporting to the grid. Adding the optional C.MI2 Internet Module (AHP1004) unlocks remote app control, while the C.MG3 Heating Zone Control Module (EC10018) allows the boiler to manage multiple heating circuits — for example underfloor heating and radiators — at independent temperatures.
Nominal 200L / Actual 210L Cylinder Capacity
This package is sold under EHC's "200L" product designation (MPN EHCEPV14.4/200IND), but the Neptune Indirect cylinder supplied is the manufacturer's 210-litre model — the nearest cylinder size in the Neptune Indirect range, with a listed capacity of 210 litres on EHC's own technical data sheet. Dimensions and performance figures on this page reflect that 210L unit. Please confirm the exact cylinder footprint against the site survey before ordering.
Field-Configurable Output
A single boiler chassis covers 7.2, 9.6, 12.0, or 14.4kW via an on-board DIP switch, so installers can right-size the heat output to the building's calculated heat loss without stocking multiple boiler models.
Faster DHW Recovery
The Neptune Indirect cylinder uses a 0.86m² coil with a 23.08kW rating, giving a full heat-up time of around 33 minutes and a 70% reheat in roughly 26 minutes — markedly quicker than an equivalent direct (immersion-only) cylinder.
Weather Compensation
An outdoor temperature sensor (Tos) lets the boiler's controller adjust flow temperature to a selectable heating curve, reducing energy use during milder weather while maintaining comfort during cold snaps.
Automatic Anti-Legionella Cycle
A configurable disinfection routine raises cylinder temperature to a set point on a chosen day and time, addressing Legionella risk without requiring manual intervention.
Backup Immersion Heating
The cylinder's 3kW Incoloy immersion element, rated 45–65°C with an 85°C high-limit cut-out, provides electric backup water heating independent of the boiler's primary circuit.
Cascade & Multi-Zone Capable
Up to 32 Comet PV boilers can be linked via RS485 bus into a cascade for higher-demand installations, and the boiler's three-way valve control supports simultaneous space heating and DHW priority logic.
| Boiler — General | |
| Model / MPN | EHCEPV14.4/200IND |
| Boiler range | Comet PV Model 2 (7.2 / 9.6 / 12.0 / 14.4kW, field-selectable) |
| Rated output (this package) | 14.4kW |
| Heating medium | Water or antifreeze-treated water, closed-loop or open-loop forced circulation |
| Intended use | Domestic or light commercial wet central heating, underfloor heating, and indirect DHW |
| Boiler dimensions (H x W x D) | 716 x 316 x 235mm |
| Boiler weight | ≈20.5kg |
| Boiler connections | G3/4" (inside thread) |
| Safety class | IP22 |
| Boiler — Electrical | |
| Rated voltage | 240V 1N~ (single phase) |
| MCB rating | 63A |
| Load current | 60.0A |
| Min. power supply cable c.s.a.* | 10mm² |
| Max. power supply cable c.s.a. | 16mm² |
| Max. allowed network impedance | 0.22Ω |
| RCD protection | 30mA Residual Current Device required on supply |
| Boiler — Hydraulic | |
| Outlet flow temperature range | 20 – 85°C |
| Max. medium temperature | 100°C |
| Max. system pressure | 0.3MPa (3 bar) |
| Min. system pressure | 0.05MPa (0.5 bar) |
| Built-in expansion vessel | 5 litres, 1.5 bar pre-charge |
| Minimum flow rate | 3.5 l/min (models to 8kW) / 4.5 l/min (models above 8kW) |
| Cylinder — Neptune Indirect (210L unit, sold as 200L) | |
| Construction | Duplex stainless steel, TIG welded, 15 bar factory pressure tested |
| Insulation | CFC- and HCFC-free polyurethane foam |
| Cylinder capacity | 210 litres (nominal listing: 200L) |
| Dimensions (H x Diameter) | 1469 x 550mm (cased unit) |
| Weight empty / full | 50kg / 260kg |
| Indirect coil surface area | 0.86m² |
| Indirect coil water content | 4.83 litres |
| Indirect coil rating | 23.08kW |
| Heat-up time (cold to set point) | ≈33 min 05 sec |
| 70% reheat time | ≈26 min 16 sec |
| Standing heat loss | 1.58kWh/24hr (ErP band C, 66W standing loss) |
| Secondary return boss | Fitted as standard |
| Hot draw-off / cold feed / secondary return | 22mm compression connections |
| Cylinder — Immersion Heater & Pressure | |
| Immersion element | 3kW, 240V, Incoloy, 1¾" BSP thread |
| Immersion fuse requirement | 13A via double-pole isolating switch |
| Element control thermostat range | 45 – 65°C |
| Element high-limit cut-out | 85°C |
| Max. inlet mains water pressure | 12 bar |
| Operating pressure | 3.0 bar |
| Expansion vessel charge pressure | 3.0 bar |
| Expansion valve opening pressure | 6.0 bar |
| T&P relief valve opening | 7.0 bar / 90°C |
| Max. primary (boiler) circuit pressure | 3.5 bar (indirect coil, sealed system) |
| Warranty | |
| Boiler warranty | 2 years parts & labour, subject to registration within 60 days and annual servicing |
| Cylinder warranty | 2 years parts & labour from commissioning, subject to registration within 30 days |
| Cylinder stainless steel inner vessel | 25-year guarantee (domestic installations) |
*Minimum permitted cable size; actual installation cable size must be calculated by a qualified electrician per BS7671, accounting for cable type and installation method.
