How do I work out the right size and heat output for your double designer radiators?

Look at the radiator's height, width and BTU (Delta 50) output that's shown for each model — this range here covers roughly 1,000 to 7,999 BTUs. Double panel radiators give extra heat compared with single panels, so a 600 x 605mm double flat panel will typically give much more warmth than a single of the same footprint. If you have a medium room, models in the 2,000–4,000 BTU range are common; larger rooms often need items in the 4,000–7,000+ range. Match the listed BTU to the heat loss of your room, and pick a taller or wider size from the many widths (240–1,560mm) and heights (300, 600, 1,200, 1,600, 1,800mm) available.

Should I choose a vertical or a horizontal double designer radiator?

Choose vertical when floor-to-ceiling wall space is available but horizontal wall space is limited — the range includes many vertical options such as the DuraTherm 1600 x 240mm. Horizontal radiators work well under windows or on long walls; you'll find dozens of horizontal widths like 600 x 455mm and 600 x 605mm. Vertical gives a striking, space-saving look; horizontal can deliver the same heat but sit lower and span more wall. Think about where furniture sits and whether you need heat higher on the wall or lower by a window.

What's the difference between aluminium and mild steel radiators here, and which is better for you?

Mild steel models are the most numerous in the range and are robust with a classic feel, while aluminium versions heat up and cool down faster and are lighter to handle. You'll see both materials across styles and finishes — for example many DuraTherm and Park Lane designs come in mild steel, and several aluminium flat and oval profiles are listed too. If you want quick, responsive heat and easier manoeuvring, aluminium can suit you; if you prefer durability and a traditional build, mild steel is a reliable choice.

How do I pick a style and finish that suits my room?

Decide on the visual profile first — flat panels give a clean contemporary look, column profiles offer a traditional feel (see the Park Lane Colosseum column range), and oval or tube profiles deliver a softer, designer appearance. For finishes, you can choose from white, black, anthracite, chrome, bronze and bare metal among others, so match the radiator to your trim or appliance tones; for example an anthracite vertical oval can add a bold modern accent in a grey-themed living room. Think about whether the radiator should blend in or act as a feature, then pick the profile and colour that supports that choice.

If my room struggles to heat, will a double designer radiator solve the problem?

Often yes — double panel radiators are specifically built for extra heat output, making them ideal for rooms that are harder to heat than smaller spaces. For instance, upgrading to a double flat panel 600 x 605mm or a taller 1,600mm vertical double unit will raise the available output significantly compared with a single panel of similar size. Check the BTU figure for the model you like and aim for a higher-band unit (3,000–6,000+ BTU) for larger rooms. If you need guidance matching that BTU to your exact room, choose a model with the size and finish you want and compare its listed output to your room's heat requirement.

Double Designer Radiators

Double designer radiators feature two panels for extra heat output, all with a stunning designer look. They’re great for medium to large size rooms, which are harder to heat than smaller spaces.

If you’re looking for something stylish to wow guests but still want your radiator to pack plenty of heat, this is the perfect option for you.

Vertical designer radiators are great where wall space is at a premium. Horizontal options are great for rooms with lots of available wall space.

Our designer radiators also come in a range of styles and finishes to suit the look of your home.

Shop our collection to find the ideal option for you.

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Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 300 x 425mm

4.9

37 ratings

More Options Available

£54.95 inc
VAT

Save £15.05 | Was £70.00

duratherm-horizontal-oval-tube-double-panel-designer-radiator-600-x-420mm-black

DuraTherm Oval Tube Double Panel Designer Radiator - 600 x 420mm Black

5.0

32 ratings

More Options Available

£69.95 inc
VAT

Save £10.04 | Was £79.99

Park Lane Traditional Colosseum Double Bar Column Radiator White 300 x 425mm

4.9

37 ratings

More Options Available

£69.99 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Black 300 x 425mm

4.9

37 ratings

More Options Available

£69.99 inc
VAT

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1600 x 240mm Black

5.0

839 ratings

More Options Available

£79.95 inc
VAT

Save £10.04 | Was £89.99

duratherm-horizontal-double-flat-panel-designer-radiator-600-x-455mm-black

DuraTherm Double Flat Panel Designer Radiator - 600 x 455mm Black

5.0

708 ratings

More Options Available

£79.95 inc
VAT

Save £20.04 | Was £99.99

Park Lane Traditional Colosseum Double Bar Column Radiator White 300 x 605mm

4.9

37 ratings

More Options Available

£79.99 inc
VAT

duratherm-horizontal-oval-tube-double-panel-designer-radiator-600-x-420mm-anthracite

DuraTherm Oval Tube Double Panel Designer Radiator - 600 x 420mm Anthracite

5.0

32 ratings

More Options Available

£84.99 inc
VAT

DuraTherm Horizontal Double Flat Panel Designer Radiator - 600 x 455mm White

5.0

708 ratings

More Options Available

£89.95 inc
VAT

Save £15.00 | Was £104.95

duratherm-horizontal-double-flat-panel-designer-radiator-600-x-455mm-anthracite

DuraTherm Double Flat Panel Designer Radiator - 600 x 455mm Anthracite

5.0

708 ratings

More Options Available

£89.95 inc
VAT

Save £10.05 | Was £100.00

Park Lane Traditional Colosseum Double Bar Column Radiator Black 300 x 605mm

4.9

37 ratings

More Options Available

£89.95 inc
VAT

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1800 x 240mm Black

5.0

839 ratings

More Options Available

£89.99 inc
VAT

Save £10.00 | Was £99.99

Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 300 x 605mm

4.9

37 ratings

More Options Available

£90.00 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 600 x 425mm

4.9

126 ratings

More Options Available

£90.00 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Black - 600 x 425mm

4.9

126 ratings

More Options Available

£94.95 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator White 600 x 425mm

4.9

126 ratings

More Options Available

£94.99 inc
VAT

duratherm-horizontal-oval-tube-double-panel-designer-radiator-600-x-420mm-white

DuraTherm Oval Tube Double Panel Designer Radiator - 600 x 420mm White

5.0

32 ratings

More Options Available

£95.00 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Black - 600 x 605mm

4.9

126 ratings

More Options Available

£95.00 inc
VAT

Save £24.99 | Was £119.99

DuraTherm Horizontal Oval Tube Double Panel Designer Radiator - 600 x 600mm Black

5.0

32 ratings

More Options Available

£99.95 inc
VAT

Save £25.00 | Was £124.95

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1800 x 240mm White

5.0

839 ratings

More Options Available

£99.95 inc
VAT

Save £24.05 | Was £124.00

Park Lane Traditional Colosseum Double Bar Column Radiator White 600 x 605mm

4.9

126 ratings

More Options Available

£99.95 inc
VAT

Save £19.05 | Was £119.00

DuraTherm Horizontal Double Flat Panel Designer Radiator - 600 x 605mm Anthracite

5.0

708 ratings

More Options Available

£99.95 inc
VAT

Save £15.05 | Was £115.00

Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 300 x 1010mm

4.9

37 ratings

More Options Available

£99.99 inc
VAT

Save £20.00 | Was £119.99

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1800 x 240mm Anthracite

5.0

839 ratings

More Options Available

£99.99 inc
VAT

Save £20.01 | Was £120.00

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1600 x 240mm Anthracite

5.0

839 ratings

More Options Available

£99.99 inc
VAT

Save £10.01 | Was £110.00

Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 300 x 1190mm

4.9

37 ratings

More Options Available

£100.00 inc
VAT

DuraTherm Horizontal Double Flat Panel Designer Radiator - 600 x 605mm White

5.0

708 ratings

More Options Available

£104.95 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator White 300 x 830mm

4.9

37 ratings

More Options Available

£104.95 inc
VAT

DuraTherm Vertical Oval Tube Double Panel Designer Radiator - 1600 x 240mm White

5.0

839 ratings

More Options Available

£110.00 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Black - 300 x 830mm

4.9

37 ratings

More Options Available

£110.00 inc
VAT

Park Lane Traditional Colosseum Double Bar Column Radiator Anthracite 300 x 830mm

4.9

37 ratings

More Options Available

£110.00 inc
VAT

DuraTherm Horizontal Oval Tube Double Panel Designer Radiator - 600 x 600mm Anthracite

5.0

32 ratings

More Options Available

£115.00 inc
VAT

DuraTherm Horizontal Double Flat Panel Designer Radiator - 600 x 605mm Black

5.0

708 ratings

More Options Available

£119.95 inc
VAT

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