Smart Electric Boilers
EHS Flex – Flexible heating for a renewable future
✓ Suitable for most property types
✓ Range rateable heating and hot water to match property requirements
✓ Aligned to UK Net-Zero Goals
EHS Flex – The smart electric boiler family with
range rated flexibility built in
The EHS FLex boiler range is a versatile collection of electric boilers designed to give you a smarter, simpler way to heat homes — without gas. Named for its range-rated flexibility, every model in the Flex range allows you to adjust the output to match the specific heating requirements of the property. That means no more over-sizing, no wasted energy, and a more efficient install every time.
From compact Combi boilers for flats, to powerful System boilers for multi-bathroom homes, and the intelligent Flex+ for caravans and limited-supply set-ups, the range covers it all. Each model is pre-wired, flue-free, and compatible with smart controls, making installation quick, clean, and future-ready. Whether you’re retrofitting or starting from scratch, the Flex range gives you the control and compatibility you need.
Why Choose a Flex Smart Electric Boiler
Eco Credentials
✓ 100% efficient
✓ No direct CO2 emissions
✓ Compatible with solar pv & air source heat pumps
✓ Aligns with 2025 and 2050 UK net-zero goals
✓ Near silent in operation
✓ Carbon free home heating if used in conjunction with 100% renewable energy tariff
Easy to install
✓ Pre-wired for faster fitting
✓ No flue required (no need to site near external wall)
✓ Compact design, flexible siting
✓ Integrated pump and expansion vessel
✓ Compatible with underfloor heating systems
✓ Works with existing radiators and pipework
✓ Compatible with RF/Wi-Fi thermostats
Easy to Maintain
✓ No mandatory annual gas certification
✓ No carbon monoxide risk
✓ Minimal servicing & repairs
✓ Only three moving parts
✓ Spare parts available on next-day delivery
✓ Minimal training required
Flexibility & Compatibility
✓ Suitable for 230V single phase and 400V three phase
✓ Power can modulate from 2kW up to full output
✓ Range rateable to match property heating demand
✓ Compatible with underfloor heating, solar pv & air source heat pumps
✓ Suitable for volt free, hard wired and wireless thermostats and controls
Meet the Flex Boiler Family
Available in 7Kw, 14Kw or 24Kw
Flex Combi Boilers
Compact and Convenient
Ideal for smaller properties with a single bathroom, the Flex Combi boiler is a direct electric replacement for a traditional gas combi. It delivers instant hot water and central heating without the need for a hot water cylinder, external flue, or gas supply. Pre-wired, near-silent and easy to site, it’s the go-to choice for quick, clean installs in flats, apartments, and rental properties.
Flex System Boilers
Built for bigger demands
The Flex System boiler is perfect for larger homes with multiple bathrooms or higher hot water needs. Designed to work with unvented indirect hot water cylinders, it offers powerful, efficient heating that integrates seamlessly with solar PV and off-peak tariffs. With its compact form, no flue requirement, and compatibility with underfloor heating, it’s a flexible option for new builds and upgrades alike.
Flex+ Boilers
Smart Power Control For limited Supply
Specifically engineered for buildings with limited electric supply e.g: caravans, lodges and small units, the Flex+ model features adaptive smart power control.
It continuously monitors household electricity usage and automatically adjusts boiler output to stay within the available circuit capacity. Fully autonomous and ideal for restricted supplies, Flex+ ensures safe, efficient heating without overloading the system — perfect for where space and power are at a premium.
** Now available with our Electric Combi Boiler Installers Kit
Electric Combi Fitters Kit
Add 2 years to your combi warranty
The all in one kit that gives you right parts at the right time for the right price. Using one will extend your warranty to 7 years
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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!