Original: $3,852.80
-65%$3,852.80
$1,348.48The Story
The EHC 12kW SlimJim Electric Flow Boiler & 200L Pre-Plumbed Cylinder Package (EHCSJ12/200PPC) combines the compact 12kW SlimJim electric flow boiler with a factory pre-plumbed 200-litre Neptune Indirect Unvented Stainless Steel Cylinder. The cylinder arrives with its controls, valves, and circulating pump already fitted and wired, cutting on-site installation time versus a standard (non-pre-plumbed) indirect cylinder package.
Qualified Installation & Load Check Required
This boiler must be installed and electrically connected by a qualified electrician in accordance with BS7671. A load check must be carried out before installation, as the boiler draws 50.0A and the property's incoming supply may need upgrading. The supply must be protected at the meter position with a 30mA double-pole RCD (minimum 3mm contact separation) and a suitably rated MCB. A magnetic filter must be fitted to the return pipework before the circulation pump — failure to clean it annually may result in boiler or system failure and will affect warranty cover.
Pre-Plumbed for Faster Fit
The cylinder's automatic by-pass, wiring centre, combination valve, temperature and pressure relief valve, tundish, twin 2-port zone valves, filling loop, and high-efficiency circulating pump are pre-fitted and pre-wired at the factory. EHC estimate this can save up to 70% of installation time on the cylinder side compared with a standard indirect cylinder fitted with loose components.
Model-Specific Cylinder Performance Data Not Published
EHC's current documentation confirms the 200L capacity and 1120mm x 710mm cased dimensions of the pre-plumbed cylinder used in this package, but does not publish model-specific coil surface area, heat-up time, or weight figures. Confirm these directly with EHC if required for a design calculation.
Compact Flow Boiler Footprint
At 912 x 203 x 172mm, the SlimJim boiler is designed to maximise cupboard space, with an easy-fit front cover for future maintenance access.
Pre-Wired Cylinder Controls
The cylinder's wiring centre, zone valves, and pump are pre-connected at the factory, reducing the electrical terminations an installer needs to make on site.
Three-Stage Output Control
On-board dip switches allow the boiler's rated output to be staged down, giving some flexibility to match the installed heat load.
High-Current Safety Cut-Out
A dedicated WT3 safety thermal cut-out disconnects the boiler if internal temperature reaches approximately 100°C, protecting the heat exchanger.
Faster DHW Recovery Than Direct
As an indirect cylinder heated via the boiler's primary coil, recovery is markedly quicker than an equivalent-size direct (immersion-only) cylinder.
No Flue, No Combustion Byproducts
As a fully electric flow boiler, the SlimJim requires no flue, no gas supply, and no annual gas safety check.
| Boiler — 12kW SlimJim (General) | |
| Model / MPN | EHCSJ12/200PPC |
| Boiler chassis | SlimJim Electric Flow Boiler |
| Boiler dimensions (H x W x D) | 912 x 203 x 172mm |
| Boiler weight | ≈11kg |
| Boiler connections | 22mm compression (flow top, return bottom) |
| Safety class | IP22 |
| Outflow water temperature range | 30 – 80°C |
| Max. water temperature | 100°C |
| Overheat protection cut-out | 100°C |
| Max. system pressure | 3 bar |
| Min. system pressure | 0.5 bar |
| Boiler — 12kW SlimJim (Electrical) | |
| Electrical supply | 240V 1ph 50Hz |
| Load current | 50.0A |
| Minimum permitted cable diameter* | 10mm² |
| Recommended protection (MCB) | 63A |
| Max. allowed network impedance | 0.24Ω |
| Heat output | 40,946 BTU/h |
| ErP rating | D |
| Cylinder — 200L Pre-Plumbed Indirect | |
| Cylinder capacity | 200 litres |
| Cased height | 1120mm |
| Cased diameter | 710mm |
| Construction | Duplex stainless steel, TIG welded |
| Factory pressure test | 15 bar |
| Insulation | CFC- and HCFC-free polyurethane foam |
| Regulatory status | Controlled service – England & Wales Building Reg. G3 / Scotland Technical Standard P3 / N. Ireland Building Reg. Part F |
| 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 |
| Max. operating pressure | 7.0 bar |
| T&P relief valve opening | 7.0 bar |
| Immersion element | 3kW, 240V, Incoloy |
| Immersion electrical supply | Dedicated 240V circuit, fused per element |
| Pre-Plumbed Pack — Included Components | |
| Controls | Pre-wired wiring centre |
| Valves | Combination valve, twin 2-port zone valves |
| Safety | Temperature & pressure relief valve, tundish |
| Circulation | High-efficiency circulating pump |
| Fill/vent | Filling loop, automatic by-pass |
| Warranty | |
| Boiler warranty | 2 years parts & labour, subject to registration and annual servicing |
| Cylinder warranty | 2 years parts & labour from commissioning, subject to registration |
| 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.
Description
The EHC 12kW SlimJim Electric Flow Boiler & 200L Pre-Plumbed Cylinder Package (EHCSJ12/200PPC) combines the compact 12kW SlimJim electric flow boiler with a factory pre-plumbed 200-litre Neptune Indirect Unvented Stainless Steel Cylinder. The cylinder arrives with its controls, valves, and circulating pump already fitted and wired, cutting on-site installation time versus a standard (non-pre-plumbed) indirect cylinder package.
Qualified Installation & Load Check Required
This boiler must be installed and electrically connected by a qualified electrician in accordance with BS7671. A load check must be carried out before installation, as the boiler draws 50.0A and the property's incoming supply may need upgrading. The supply must be protected at the meter position with a 30mA double-pole RCD (minimum 3mm contact separation) and a suitably rated MCB. A magnetic filter must be fitted to the return pipework before the circulation pump — failure to clean it annually may result in boiler or system failure and will affect warranty cover.
Pre-Plumbed for Faster Fit
The cylinder's automatic by-pass, wiring centre, combination valve, temperature and pressure relief valve, tundish, twin 2-port zone valves, filling loop, and high-efficiency circulating pump are pre-fitted and pre-wired at the factory. EHC estimate this can save up to 70% of installation time on the cylinder side compared with a standard indirect cylinder fitted with loose components.
Model-Specific Cylinder Performance Data Not Published
EHC's current documentation confirms the 200L capacity and 1120mm x 710mm cased dimensions of the pre-plumbed cylinder used in this package, but does not publish model-specific coil surface area, heat-up time, or weight figures. Confirm these directly with EHC if required for a design calculation.
Compact Flow Boiler Footprint
At 912 x 203 x 172mm, the SlimJim boiler is designed to maximise cupboard space, with an easy-fit front cover for future maintenance access.
Pre-Wired Cylinder Controls
The cylinder's wiring centre, zone valves, and pump are pre-connected at the factory, reducing the electrical terminations an installer needs to make on site.
Three-Stage Output Control
On-board dip switches allow the boiler's rated output to be staged down, giving some flexibility to match the installed heat load.
High-Current Safety Cut-Out
A dedicated WT3 safety thermal cut-out disconnects the boiler if internal temperature reaches approximately 100°C, protecting the heat exchanger.
Faster DHW Recovery Than Direct
As an indirect cylinder heated via the boiler's primary coil, recovery is markedly quicker than an equivalent-size direct (immersion-only) cylinder.
No Flue, No Combustion Byproducts
As a fully electric flow boiler, the SlimJim requires no flue, no gas supply, and no annual gas safety check.
| Boiler — 12kW SlimJim (General) | |
| Model / MPN | EHCSJ12/200PPC |
| Boiler chassis | SlimJim Electric Flow Boiler |
| Boiler dimensions (H x W x D) | 912 x 203 x 172mm |
| Boiler weight | ≈11kg |
| Boiler connections | 22mm compression (flow top, return bottom) |
| Safety class | IP22 |
| Outflow water temperature range | 30 – 80°C |
| Max. water temperature | 100°C |
| Overheat protection cut-out | 100°C |
| Max. system pressure | 3 bar |
| Min. system pressure | 0.5 bar |
| Boiler — 12kW SlimJim (Electrical) | |
| Electrical supply | 240V 1ph 50Hz |
| Load current | 50.0A |
| Minimum permitted cable diameter* | 10mm² |
| Recommended protection (MCB) | 63A |
| Max. allowed network impedance | 0.24Ω |
| Heat output | 40,946 BTU/h |
| ErP rating | D |
| Cylinder — 200L Pre-Plumbed Indirect | |
| Cylinder capacity | 200 litres |
| Cased height | 1120mm |
| Cased diameter | 710mm |
| Construction | Duplex stainless steel, TIG welded |
| Factory pressure test | 15 bar |
| Insulation | CFC- and HCFC-free polyurethane foam |
| Regulatory status | Controlled service – England & Wales Building Reg. G3 / Scotland Technical Standard P3 / N. Ireland Building Reg. Part F |
| 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 |
| Max. operating pressure | 7.0 bar |
| T&P relief valve opening | 7.0 bar |
| Immersion element | 3kW, 240V, Incoloy |
| Immersion electrical supply | Dedicated 240V circuit, fused per element |
| Pre-Plumbed Pack — Included Components | |
| Controls | Pre-wired wiring centre |
| Valves | Combination valve, twin 2-port zone valves |
| Safety | Temperature & pressure relief valve, tundish |
| Circulation | High-efficiency circulating pump |
| Fill/vent | Filling loop, automatic by-pass |
| Warranty | |
| Boiler warranty | 2 years parts & labour, subject to registration and annual servicing |
| Cylinder warranty | 2 years parts & labour from commissioning, subject to registration |
| 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.
