24 hours of warmth. 3–5 hours of electricity.
radTherm® is a partial storage heater, the most efficient electric radiator on the market. It heats a dense ceramic core in minutes, holds that warmth for hours, and tops itself up in short bursts. Heat on demand, day or night, on any standard tariff.
- 3–5 hrs
- Electricity for 24hr warmth
- 15–20 min
- Electricity per hour, once warm
- 6×
- The surface area of a basic rad
- 7cm
- Slim wall-hung profile
The core idea
Convection and radiation, powered by a ceramic core.
Most electric radiators are a metal element behind a thin panel: instant heat, but the warmth vanishes the moment the power stops. radTherm® combines convection and radiation with a high-density Magmatic® ceramic core that keeps releasing heat long after the element switches off. That's what “partial storage” means: the responsiveness of an on-demand radiator, with the staying power of stored heat.
The cycle
Heat up → hold → top up.
On repeat, all day, and most homes never notice it happening.
Step 1 · Heat up
The core heats in minutes
Electricity rapidly heats the high-density Magmatic® ceramic core, and the High Fin surface pushes even warmth into the room through convection and radiation.
Step 2 · Hold
The ceramic stores the heat
The core retains heat for hours, even after the element switches off, so the room stays warm without constantly drawing power.
Step 3 · Top up
Short sips keep it warm
Power modulation tops the core up in short bursts. Once at temperature, it typically needs just 15–20 minutes of electricity per hour to hold a cosy home.
The most efficient radiator on the market
Three features that do the heavy lifting.
Magmatic® ceramic core
An exclusive, ultra-dense fireclay core that heats in minutes and holds warmth for hours, typically needing just 3–5 hours of electricity a day to keep your home warm around the clock.
Six times the surface area
The High Fin fluted design spreads heat evenly across six times the surface of a basic panel, warming the room faster, eliminating cold spots, and using less energy doing it.
Power modulation
Energy use adjusts automatically to the room. Once up to temperature, the radiator draws only short top-ups, around 15–20 minutes of electricity per hour, to maintain your set comfort level.
Not a storage heater
Partial storage ≠ old-school storage heating.
Storage heaters charge overnight on a special tariff and hope the heat lasts. radTherm® doesn't work that way. It heats whenever you want, on the tariff you already have.
Charges overnight on Economy 7, so you need a special tariff
Runs on any standard tariff, with no special meter or tariff required
All the heat is made at 3am, whether you need it or not
Heat on demand, 24/7, with short top-ups whenever the room calls for it
Runs out of heat by tea-time, then you wait until tomorrow
Never runs out: the core simply tops itself up and keeps going
One clunky input dial, no real temperature control
Precise per-room thermostats, schedules and app control
Smart from day one
Every radiator is its own brain.
You don't need a central hub or expensive third-party thermostats. Each radTherm® has its own programmable thermostat and WiFi controller, manages its own schedule, and answers to the app on your phone, wherever you are.
- Adjust each room in precise 0.5°C steps from the radTherm® app
- Set 24/7 schedules per radiator, heating only the rooms you use
- Open-window detection automatically pauses heating when the temperature drops
- Antifrost mode, child lock and adaptive programming built in
- Works with Alexa and Google Home for hands-free control
Built to outlast
Why this design lasts decades.
Inert ceramic core
No fluid to leak, no anode to consume, no oil to top up. The Magmatic® block is solid and stable for decades.
Solid-state electronics
No moving parts, no fan, no pump. Nothing to wear out, nothing to service annually.
Slim, cool-running body
Just 7cm deep, engineered to put heat into the room, with low-surface-temperature options where safety matters.
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