Energy Efficient Radiators
Choosing an energy efficient radiator means understanding what efficiency actually means for your heating system. Our cast iron radiators work differently to a standard panel rad. The thermal mass holds heat long after the boiler stops, so the boiler runs less to maintain room temperature. Correctly sized, TRV-controlled and built to last decades, our cast iron and electric cast iron radiators are a genuine long-term investment in efficient heating.
What energy efficient radiator options do we offer?
Browse our cast iron radiators range for central heating models across every height, column depth and style. For spaces without central heating, our electric cast iron radiators convert 100% of electricity to heat in the radiator itself, with thermostatic control as standard. Pair any model with our thermostatic radiator valves to control each room independently and avoid heating spaces you’re not using.
Energy efficient electric cast iron radiators
No central heating? No boiler? Our electric cast iron radiators are the energy efficient option for rooms where connecting to a wet system isn’t practical. Every unit of electricity goes directly into the radiator. Nothing is lost in pipework or the boiler itself.
Our electric cast iron range delivers heat output from around 420 to 2,800 watts depending on the model. Every electric radiator is thermostatically controlled. Larger models feature dual heating elements for balanced heat distribution. An app-controlled fused spur option lets you set schedules and control single or multiple radiators from your phone, so you only heat when and where you need to.
Available models include the Bartholomew, Churchill, Clarendon, Gatsby, Kensington, Louis, Montpellier, Neo Georgian 4 and 6 Column, Oxford and Piccadilly. All outputs are calculated in accordance with BS EN442 standards.
Order your energy efficient radiator today
Need help sizing for efficiency? Use our free heat calculator first, then call 01205 280354 or email sales@paladinradiators.com. We’ll help you specify the right model, size and configuration for your room.
Top picks for energy efficient radiators
Churchill: At 350mm tall with 3 to 40 sections and 480 BTUs per section, the Churchill delivers high output in a compact, low-profile footprint. One of the most heat-efficient models in the range relative to its height. Available as electric or central heating.
Neo Georgian 4 Column: Substantial output per section across five height options from 360mm to 960mm. The 4-column depth gives more heat per section than shallower models for the same wall space, making it an efficient choice for larger rooms where output-per-section matters. Available as electric or central heating.
Electric Cast Iron Radiator: For rooms without central heating, the Paladin electric range gives you cast iron heat retention with no boiler, no pipework and no heat loss in the system. Thermostatically controlled, app-compatible, and available across our most popular models in any colour.
How cast iron radiators save energy
Think about what happens when a standard panel rad finishes a heating cycle. It cools almost immediately. The boiler fires again to compensate. Cast iron works differently. The density of the iron stores heat and continues radiating warmth into the room after the boiler has stopped. The boiler fires less often to maintain temperature. That’s where the efficiency is.
Three things make cast iron radiators more efficient in practice:
Thermal mass: Cast iron’s density allows it to store heat and continue radiating warmth even after the power is turned off, potentially leading to energy savings. The heavier the radiator, the longer it holds temperature.
Correct sizing: An oversized radiator wastes energy. Use our free heat calculator to confirm the exact output your room needs before specifying. Getting this right is the single most impactful efficiency decision you can make.
TRV control: Fitting thermostatic radiator valves to every radiator means each room only heats to the temperature you set. No energy wasted warming rooms beyond their requirement
Where do energy efficient cast iron radiators work best?
Period properties with solid walls and single glazing: high heat demand rooms benefit most from cast iron’s sustained output and retention.
Modern well-insulated homes: correctly sized cast iron in a small section count runs efficiently and holds temperature without frequent cycling.
Rooms without central heating: electric cast iron is the cleanest single-room heating option with no installation pipework.
Extensions and conservatories: glazed spaces lose heat fast; electric cast iron gives independent control without touching the main system.
Holiday homes and rental properties: TRV-controlled cast iron stays efficient when properties are unoccupied for periods.
Frequently Asked Questions (FAQs)
Are cast iron radiators energy efficient?
Yes, cast iron radiators are energy efficient in key respects. Cast iron’s density allows it to store heat and continue radiating warmth after the boiler stops, potentially leading to energy savings compared to lighter panel radiators that cool immediately. Correct sizing and TRV control improve efficiency further.
Are energy efficient electric radiators better than gas central heating?
Electric and gas heating suit different situations. Electric cast iron radiators convert electricity directly to heat in the unit, giving 100% conversion efficiency at the point of use. Gas central heating is generally cheaper to run per unit of heat in the UK due to gas prices, but electric suits rooms without central heating where pipe installation is impractical or expensive.
What are the most energy efficient radiators in the UK?
The most energy efficient radiators in the UK are those correctly sized for the room, fitted with TRV controls and made from a material with good heat retention. Cast iron scores well on retention. Our electric cast iron radiators add thermostatic control and app scheduling. Use our heat calculator to confirm the exact output your room needs.
Are modern energy efficient cast iron radiators better than old ones?
Modern cast iron radiators from Paladin are built to the same principles as older models, with the advantage of new manufacture, a 10-year guarantee and consistent build quality. New electric versions add thermostat controls, app compatibility and BS EN442-compliant output ratings that older original cast iron radiators don’t have.
Are new energy efficient radiators worth the investment?
New energy efficient radiators are a worthwhile investment when correctly specified. Cast iron lasts for decades, the thermal mass reduces boiler run time, and a TRV-controlled system heats only where and when you need. The initial cost is recovered over time through a well-managed heating system.
How do I make my radiators more energy efficient?
The most effective steps are: size each radiator correctly using a BTU calculator, fit thermostatic radiator valves to every room, bleed radiators annually to remove trapped air, and avoid covering radiators with furniture or curtains. For rooms without central heating, switching to an electric cast iron radiator with thermostat control gives immediate independent efficiency gains.
Are energy efficient electric cast iron radiators available across all Paladin models?
Yes, electric cast iron radiators are available across a wide range of Paladin models including the Bartholomew, Churchill, Clarendon, Gatsby, Kensington, Louis, Montpellier, Neo Georgian 4 and 6 Column, Oxford and Piccadilly. Call us to discuss electric conversion options for other models in the range.
“I want to say thanks and how fantastic the radiators look along with the cast quality and the excellent painting and polishing finish. I now can’t wait to get them installed! Many thanks again for all your help and assistance.”
“Thank you for all your help, we will definitely recommend Paladin to anyone we know who is looking for cast iron radiators and will get in touch when we’re needing radiators for our ground floor.”