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Compact Design: Low 400 mm profile fits beneath windows and dwarf walls without reducing heat output.
True Wet-System Feel: Water-filled sealed core delivers steady, radiant warmth like a central heating radiator.
Smart RFC Control: Wireless programmable thermostat with adaptive start and frost protection.
Plug-and-Play Installation: Mount and connect directly to mains power — no plumbing or topping up required.
Energy Efficient: 1.1 kW output with Lot 20 compliance and Smart Heating software for eco temperature management.
British Built Quality: Handmade in the UK and IP44 rated for bathroom Zone 2 & 3 safety.
Warranty & Support: Supplied with a 2-year manufacturer’s warranty.
The RadiWarm HE4100 is a low-height, water-filled electric radiator designed for reliable and efficient heating where wall space is limited. At only 400 mm high, it’s ideal for conservatories, bay windows, and dwarf walls — providing full heating performance in a compact footprint.
Each radiator is pre-filled with specially treated water and permanently sealed, requiring no plumbing, bleeding, or maintenance. The built-in micro-boiler produces a smooth, radiant heat output that closely replicates the feel of traditional wet central heating, without the need for pipework or a gas connection.
The HE4100 connects wirelessly to the RadiWarm RFC controller, offering 7-day programmable scheduling, adaptive start, frost protection, and eco-saving functionality. Once installed, it maintains a consistent room temperature while optimising energy use.
Installation is simple — mount the radiator on the supplied wall brackets and plug it into a standard 230 V socket or spur connection. Built to IP44 standards, it’s suitable for use in Zone 2 and Zone 3 bathroom areas. The sealed, maintenance-free design ensures long-term reliability with zero ongoing servicing.
Manufactured in the UK, the RadiWarm HE4100 meets Lot 20 energy efficiency standards and is backed by a 2-year manufacturer’s warranty for complete peace of mind.
Buy the RadiWarm HE4100 Low-Height Electric Radiator from NHS — trusted heating specialists with expert advice, rapid UK delivery, and our Price Match Promise.
See More Like This: Radiators & Space Heaters & Heating Equipment
Model: RadiWarm HE4100
Supply Voltage: 230–240 V AC 50 Hz
Current: 8.5 A
Output: 1.1 kW
Protection Rating: IP44
Construction: Sealed, water-filled micro-boiler radiator
Installation: Wall-mounted using supplied brackets
Control System: Wireless RFC 7-day programmable thermostat
Mounting Height: 150 mm minimum from floor
Dimensions (H × W × D): 400 mm × 1000 mm × ~100 mm
Weight: 50 kg
Efficiency Standard: Lot 20 Compliant
Origin: Manufactured in the UK
Warranty: 2 years manufacturer’s warranty
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Whether you need a long-term, short-term, or temporary climate solution, sometimes it can help if you can break the costs down, especially if the situation is unexpected or an emergency.
To help our customers and make climate control and air quality equipment more accessible, we've worked with PayPal to provide a way to spread the cost with PayPal Pay in 3. You can use Pay in 3 for eligible shopping cart amounts between £30.00 to £2,000.00. Terms apply.
