EHS-logo
Customer Support
Product Registration

Electric Combi Boilers

Flexible heating for a renewable future

✓ Range rateable heating and hot water to match property requirements
✓ Easy to install
✓ Minimal servicing & repairs
✓ Flexible sighting – No flue required
✓ Works with existing radiators
✓ Power modulates from 2kW to full power using less energy
✓ Almost 100% efficient
Buy Flex Electric Combi Boilers
EHS range-rated electric boiler adjustable from 2kW to 24kW

Primus Flex Electric Combi Boiler for Modern Homes and Flats

The Primus Flex electric combi boiler offers homeowners and installers a versatile, efficient and easy-to-install alternative to gas heating systems. Designed for small flats and homes with a single bathroom, it delivers continuous heating and hot water without the need for a flue, gas supply or major pipework changes.

Unlike traditional boilers that operate at a fixed output, the Primus Flex features innovative range-rated technology. Installers can adjust the boiler’s output to match the precise heating and hot water requirements of each property. As a result, a single electric combi boiler can suit a wide range of applications, removing the need to select from multiple boiler sizes.

In addition, homeowners benefit from energy-efficient performance, reduced running costs and compatibility with renewable energy tariffs. The pre-wired design also helps simplify installation, saving time and effort on site while providing greater flexibility for different property types.

Furthermore, whisper-quiet operation, zero carbon monoxide risk and flexible siting make the Primus Flex a practical choice for modern homes. By combining efficiency, adaptability and ease of installation, this electric combi boiler delivers a smart, future-ready heating solution.

✓ Pre-wired for ease of installation
✓ Integrated pump and expansion vessel
✓ Continuous hot water (flow rates up to 7 I/min on 14.4kW boiler)
✓ Zero risk of carbon monoxide emission or gas leak
✓ No flue is required
✓ Range rateable heating and hot water to match property requirements
✓ Near silent in operation
✓ Minimal moving parts
✓ Minimal servicing required
✓ Flexible siting as no flue is required and it’s very compact in size
✓ Ideal for flats and properties with low heat loss, no access to gas, and high hot water demand
✓ Ability to use low cost and 100% renewable tariffs
✓ Recommended to be used with RF or WIFI programmable thermostats
✓ Can be integrated with Solar PV systems

Flex Electric Combi Boilers

Available in 14Kw or 24Kw

Indirect Cylinders
EHS black glass electric combi boiler front view with touchscreen display
Indirect Cylinders
Buy Flex Electric Combi Boilers

Electric Combination Boiler Schematic

** Now available with our Electric Combi Boiler Installers Kit

Includes all necessary plumbing parts for easy installation and comes with a 2-year extended warranty!
Contact Sales
Indirect Cylinders

Electric Combi Fitters Kit

Everything you need to get the job done

We put this kit together so you have the right parts at the right time for the right price
✓ Sentinal Vortex 250Magnetic filter 
✓ Sentinal X300 System Cleaner
✓ Sentinal X100 Inhibitor
✓ EPH Combi Pack 4
✓ WRAS Approved Filling Loop
✓ Automatic Bypass Valve
✓ 2 x 1/2″ & 2 x 3/4″ Isolation Valves
✓ Caleffi Flow valve 5ltr/min
Contact Sales

Installation Guides  - Join Our Installers Club

Register as an installer for access installation & set up guides, technical support and other member benefits

Register as an Installer

At EHS we recognise the growing demand for eco-friendly heating and hot water solutions.

Electric combi boilers can be run from electricity produced from renewable resources such as wind or solar power, which means that you can run your boiler completely free of CO2 emissions.

Moving to electricity is easy, as you don’t need to replace any of your existing pipework or radiators.

By 2050 the UK Government are aiming to generate 100% emission-free electricity. Electric Heating will be a major facilitator in reaching this goal, and in 2020 the Government pledged 40GW of wind-generated electricity in the UK by 2030. This is enough electricity to power every household in the UK!

Electricity prices are currently 3 times more than gas, but as gas is phased out and electricity becomes the fuel of choice, prices per unit of energy are likely to reach parity in the not-too-distant future, and as an electric boiler is 98% efficient, it will be cheaper to run.

By moving to electric heating with a renewable energy tariff, you’ll not only be moving to carbon-free heating but doing your bit for a renewable future!