EHC Basic Compact All In One 12kW Electric Boiler & 300L Indirect Unvented Hot Water Cylinder

Key Features

• 300L indirect unvented hot water cylinder — supplies hot water for showers, baths, and sinks
• 12 kW boiler output — reheats water in approximately 2–3 hours
• Digital display on boiler — set temperature, and see current water temperature and error codes
• Power stage indicator on boiler — shows the boiler's current operating stage
• Pre-plumbed and pre-assembled hot water cylinder — for simpler installation
• Grundfos pump and copper press fittings — built for durability
• Zoned heating control — 2 x 22mm zone valves help with insulation
• Stainless steel cylinder with polyurethane installation — retains water temperature
• 75 kg empty weight — cylinder weighs 375 kg once full to the 300L capacity

Guarantee

• 5 years

What's Included

• 12 kW Heat-only electric boiler
• 300L Pre-plumbed cylinder
• Inlet control set
• Tundish
• Temperature & pressure-relief valve
• 3 kW Immersion heater
• 2x 2-Port zone valve
• Grundfos circulation pump
• System expansion vessel
• 3-Bar pressure-relief valve
• Dual cylinder stat
• Filling loop
• Automatic bypass valve
• 2x Auto air vent
• DHW expansion vessel (loose)

The CAIO12/300IND-B all-in-one package pairs a 300L hot water cylinder with a 15 kW electric system boiler, offering reliable central heating and a steady supply of hot water in a fully integrated, factory-assembled unit. Its compact and efficient design makes it an ideal solution for small-to-medium-sized homes seeking a quiet, low-maintenance, and space-saving alternative to conventional heating systems.

Pre-Plumbed and Pre-Assembled Hot Water Cylinder

This unvented cylinder is supplied pre-assembled and pre-plumbed, complete with two 22 mm zone valves and standard pipework connections. The factory-fitted design reduces installation time and simplifies plumbing, allowing installers to fit the system quickly and efficiently.

12 kW Electric System Boiler with Digital Display

The 12 kW boiler heats the 300L cylinder effectively, typically bringing it to the desired temperature within around 2–3 hours, depending on the starting water temperature.

A digital display allows precise temperature control and provides live readings and error code notifications. The + / − buttons make adjusting the temperature simple, while the power stage indicator shows whether the boiler is operating at 1/3, 2/3, or full capacity.

Grundfos Circulation Pump

The integrated Grundfos pump ensures efficient circulation of hot water throughout the heating system, maintaining even temperatures across the home. Its quiet operation makes it particularly suitable for living spaces.

Copper Press Fittings

Copper press fittings create secure, leak-proof joints using press-fit technology, eliminating the need for soldering or brazing. Copper’s natural resistance to corrosion ensures long-lasting and reliable plumbing.

Stainless Steel Cylinder with Polyurethane Insulation

The stainless steel cylinder resists corrosion, helping to prevent leaks and extend the unit’s lifespan. It is also less prone to scaling or pitting, making it suitable for areas with variable water quality.

Polyurethane insulation reduces standby heat loss, keeping water hot for longer, improving energy efficiency, and helping to lower running costs.

Why Choose This Combination

The 300L indirect unvented cylinder paired with the 12 kW electric system boiler provides a compact and dependable heating solution for small-to-medium-sized homes. It delivers ample hot water for showers, baths, and sinks, ensuring a reliable supply whenever required.

Order today for a ready-to-install, energy-efficient, and space-saving heating system, with fast delivery and minimal installation effort.