The EHS Flex 7kW Electric System Boiler is a high-performance, single-phase electric heating solution designed for small properties requiring an efficient and reliable alternative to gas heating. Compact and wall-mounted, it provides consistent central heating and is compatible with both vented and unvented hot water cylinders.
Featuring a modern touchscreen display, near-silent operation and 100% efficiency at point of use, the Flex 7kW System Boiler is designed for properties where gas is unavailable or a flue cannot be installed. Its integrated pump and expansion vessel, pre-wired configuration and range-rateable 7kW output support flexible installation and heating control.
7kW Heating Output
Single Phase
100% Point-of-Use Efficiency
5 Year Warranty
Heating Output
7kW Range-Rateable
Electrical Supply
230V Single Phase
Efficiency
100% Point of Use
Applications & suitability
Small properties
Designed for small flats, studios, annexes and outbuildings with low to moderate heating demand.
Radiators & underfloor heating
Suitable for central heating systems using standard radiators or underfloor heating.
Vented & unvented cylinders
Works with both vented and unvented hot water cylinders for stored hot water applications.
No-flue installations
The electric system boiler requires no flue, allowing flexible siting where gas boiler flue installation is not possible.
Key specifications
| Brand |
EHS (Electric Heating Systems) |
| Range / Family |
Flex |
| Product Code (MPN) |
ALC1-PSY-7F |
| Product Type |
Electric System Boiler |
| Model |
Flex 7kW Single Phase |
| Fuel |
Electric |
| Phase |
Single Phase |
| Voltage |
230V |
| Current |
31 Amps |
| Recommended Breaker |
40 Amps |
| Recommended Cable Size |
6mm |
| Heating Output |
7kW (Range-Rateable) |
| Max Heating Pressure |
1.5 bar |
| Min Heating Pressure |
0.5 bar |
| Max Flow Temperature |
80°C |
| Min Flow Temperature |
20°C |
| Heating Connection Size |
3/4” Male Connector |
| PRV Connection Size |
15mm |
| Mounting |
Wall-mounted |
| Internal Vessels |
Integrated Pump & Expansion Vessel |
| Efficiency |
100% at point of use |
| Warranty |
5 Years (Subject to T&Cs) |
Installation & compatibility
The EHS Flex 7kW System Boiler is a wall-mounted, single-phase electric boiler designed to work with both vented and unvented hot water cylinders. It is pre-wired and includes an integrated pump and expansion vessel to support installation. The boiler requires a 230V electrical supply, with a specified current of 31 Amps, recommended 40 Amp breaker and 6mm cable size. Electrical installation should be carried out by a suitably qualified professional.
Design & performance benefits
Range-rateable output
The 7kW heating output is range-rateable to match the heating requirements of the property.
Integrated components
Includes an integrated pump and expansion vessel within the boiler system.
Touchscreen controls
Features an intuitive touchscreen display for heating control.
Near-silent operation
Designed for near-silent operation with minimal moving parts.
Additional installation features
No flue required
The electric boiler requires no flue, providing greater flexibility when planning the installation location.
Pre-wired installation
The boiler is supplied pre-wired to support a streamlined installation process.
Thermostat compatibility
Recommended for use with RF or WiFi programmable thermostats.
Ideal for
Small flats & studios
Suitable for smaller properties with low to moderate central heating requirements.
Annexes & outbuildings
A practical electric heating option for annexes, studios and outbuildings.
Properties without gas
Designed for applications where gas heating is unavailable or a gas boiler flue cannot be installed.
Renewable electricity systems
Suitable for applications incorporating solar PV, off-peak electricity or renewable electricity tariffs with a cylinder.
The EHS Flex 7kW Single Phase Electric System Boiler provides a compact, wall-mounted heating solution for small properties. With its range-rateable 7kW output, integrated pump and expansion vessel, touchscreen controls, no-flue design and compatibility with vented and unvented cylinders, it offers a flexible electric alternative for compatible central heating installations.
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
for selected local areas.
Eligible Postcodes Include:
- RG*
- SL*
- OX10*, OX11*, OX49*
- HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
- WD*, HA*, UB*, TW*, KT*
- W1* – W9*
- NW*, SW*
Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard
shipping rates apply based on total cart weight.
- For cart weight between 0–2 kg, the shipping cost is £4.50 with a delivery time of 2–4 working days.
- For cart weight between 2–24 kg, the shipping cost is £9.99 with a delivery time of 2–4 working days.
- For cart weight between 24 kg and above, the shipping cost is £60 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
- 1–3 items → £7.99
- 4–6 items → £15.98
- 7–9 items → £23.97
Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
- Cart weight ≤ 40 kg
Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge. For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
