How do I choose the right size and heat output for my room?

Match the radiator's BTU output band to your room's heat loss and the physical space you have. Our range shows outputs from under 1,000 BTU right up to 10,000-25,000 BTU and sizes from compact widths (400-600mm) to large panels (over 2,000mm wide and up to 2,200mm high). a small bathroom will often be met by radiators in the 1,000-2,000 BTU band and a compact 300-600mm height, while a large living room might need something in the 4,000-8,000 BTU band with a wider or taller double-panel model. If you're unsure, look for the BTU band that most closely matches your room calculation and then pick a width/height that fits the wall space.

What's the difference between Compact, Planar, Elite and LST ranges, and which is best for my room?

Compact radiators are efficient, practical panels that suit most rooms; Planar is a sleeker, contemporary range for a modern look; Elite gives a simple, budget-friendly option; and LST (low surface temperature) is designed for safety in healthcare, schools or where you need a cool-to-touch surface. If you want a slim, modern focal point choose Planar (also available in vertical styles), while for a family bathroom or a care setting LST gives peace of mind thanks to its safety focus. Compact or Elite are sensible choices if you want high heat output at a lower cost.

What do Type 11, Type 21 and Type 22 mean, and how do they affect performance?

Those Type numbers describe panel and convector layers: Type 11 is one panel, one convector (slimmer and lower output), Type 21 is two panels, one convector (more heat with modest depth), and Type 22 is two panels, two convectors (higher output and greater depth). So for a tight alcove under a window you might pick a Type 11 to save space, whereas a living room or open plan area often benefits from a Type 22 to deliver more heat without needing excessive width. Triple-panel types are also available when you need very high output from a compact footprint.

Will Stelrad radiators work with my heat pump or other low-temperature systems?

Yes, many Stelrad models are designed to work seamlessly with traditional boilers and modern low-temperature systems such as heat pumps. To compensate for the lower water temperature you'll usually select a larger surface area or a higher output model (a double panel double convector or a taller vertical unit) to achieve the same room temperature. A vertical Planar or a taller Compact K2 is a practical choice if you're switching to a heat pump and want both style and higher output.

Can I get vertical radiators or different finishes to suit my decor?

You can, the range includes both horizontal and vertical orientations, with vertical options available in taller sizes (1,600-2,200mm heights and slim widths such as 400mm), making them ideal for narrow wall spaces or as a design statement. Finishes range from clean, contemporary panels to more traditional profiles like the Deco and Elite styles, so you can pick a minimalist Planar for a modern kitchen or a Compact/Deco unit to match a classic bathroom. a 1,800 x 400mm Planar vertical gives a dramatic, space-saving focal point in a hallway.

Page 2 of 17 Stelrad Radiators

stelrad-compact-k2-radiator-600mm-x-1100mm-double-panel-double-convector-143789

Stelrad Compact K2 Type 22 600 x 1100mm Double Panel Radiator Double Convector - 143789

More Options Available

£190.99 inc
VAT

Save £23.59 | Was £214.58

stelrad-compact-p-radiator-600mm-x-2000mm-double-panel-single-convector-143776

Stelrad Compact P+ Type 21 600 x 2000mm Double Panel Radiator Single Convector - 143776

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£329.10 inc
VAT

Save £50.81 | Was £379.91

stelrad-compact-p-radiator-600mm-x-700mm-double-panel-single-convector-143767

Stelrad Compact P+ Type 21 600 x 700mm Double Panel Radiator Single Convector - 143767

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£110.36 inc
VAT

Save £15.65 | Was £126.01

stelrad-compact-k1-radiator-450mm-x-1400mm-single-panel-single-convector-143689

Stelrad Compact K1 Type 11 450 x 1400mm Single Panel Radiator Single Convector - 143689

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£114.87 inc
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Save £16.78 | Was £131.65

stelrad-compact-with-style-k2-radiator-500mm-x-600mm-double-panel-double-convector-7452206

Save £51.36 | Was £294.04

stelrad-compact-k1-radiator-450mm-x-1800mm-single-panel-single-convector-143691

Stelrad Compact K1 Type 11 450 x 1800mm Single Panel Radiator Single Convector - 143691

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£167.77 inc
VAT

Save £17.41 | Was £185.18

stelrad-planar-k2-radiator-500mm-x-1400mm-double-panel-double-convector-140940

Stelrad Planar K2 Type 22 500 x 1400mm Double Panel Radiator Double Convector - 140940

More Options Available

£478.50 inc
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stelrad-compact-k2-radiator-600mm-x-600mm-double-panel-double-convector-143784

Stelrad Compact K2 Type 22 600 x 600mm Double Panel Radiator Double Convector - 143784

More Options Available

£109.04 inc
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Save £15.33 | Was £124.37

stelrad-planar-k2-radiator-700mm-x-400mm-double-panel-double-convector-140983

Save £19.25 | Was £144.22

stelrad-compact-k2-radiator-450mm-x-1600mm-double-panel-double-convector-143726

Stelrad Compact K2 Type 22 450 x 1600mm Double Panel Radiator Double Convector - 143726

More Options Available

£216.83 inc
VAT

Save £26.79 | Was £243.62

stelrad-compact-p-radiator-450mm-x-1400mm-double-panel-single-convector-143707

Save £33.21 | Was £302.05

stelrad-compact-k2-radiator-600mm-x-900mm-double-panel-double-convector-143787

Stelrad Compact K2 Type 22 600 x 900mm Double Panel Radiator Double Convector - 143787

More Options Available

£159.97 inc
VAT

Save £6.13 | Was £166.10

stelrad-compact-p-radiator-450mm-x-600mm-double-panel-single-convector-143700

Stelrad Compact P+ Type 21 450 x 600mm Double Panel Radiator Single Convector - 143700

More Options Available

£81.22 inc
VAT

Save £10.03 | Was £91.25

stelrad-compact-p-radiator-600mm-x-1400mm-double-panel-single-convector-143773

Stelrad Compact P+ Type 21 600 x 1400mm Double Panel Radiator Single Convector - 143773

More Options Available

£205.56 inc
VAT

stelrad-compact-p-radiator-450mm-x-1100mm-double-panel-single-convector-143705

Stelrad Compact P+ Type 21 450 x 1100mm Double Panel Radiator Single Convector - 143705

More Options Available

£130.16 inc
VAT

Save £23.39 | Was £153.55

stelrad-planar-k1-radiator-500mm-x-600mm-single-panel-single-convector-140927

Save £20.23 | Was £183.80

Page 2 of 17 Stelrad Radiators

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Stelrad Compact K2 Type 22 600 x 1100mm Double Panel Radiator Double Convector - 143789

Stelrad Compact P+ Type 21 600 x 2000mm Double Panel Radiator Single Convector - 143776

Stelrad Compact P+ Type 21 600 x 700mm Double Panel Radiator Single Convector - 143767

Stelrad Compact K1 Type 11 450 x 1400mm Single Panel Radiator Single Convector - 143689

Stelrad Compact with Style K2 Type 22 500 x 600mm Double Panel Radiator Double Convector - 7452206

Stelrad Planar K2 Type 22 700 x 1000mm Double Panel Radiator Double Convector - 140986

Stelrad Compact K2 Type 22 450 x 1800mm Double Panel Radiator Double Convector - 143727

Stelrad Compact K1 Type 11 450 x 1800mm Single Panel Radiator Single Convector - 143691

Stelrad Planar K2 Type 22 500 x 1400mm Double Panel Radiator Double Convector - 140940

Stelrad Compact K2 Type 22 600 x 600mm Double Panel Radiator Double Convector - 143784

Stelrad Planar K2 Type 22 700 x 400mm Double Panel Radiator Double Convector - 140983

Stelrad Compact K1 Type 11 600 x 1200mm Single Panel Radiator Single Convector - 143754

Stelrad Compact P+ Type 21 450 x 1000mm Double Panel Radiator Single Convector - 143704

Stelrad Compact K2 Type 22 450 x 900mm Double Panel Radiator Double Convector - 143721

Stelrad Compact K2 Type 22 450 x 1600mm Double Panel Radiator Double Convector - 143726

Stelrad Compact P+ Type 21 450 x 1400mm Double Panel Radiator Single Convector - 143707

Stelrad Compact P+ Type 21 300 x 2000mm Double Panel Radiator Single Convector - 143659

Stelrad Elite K2 Type 22 600 x 900mm Double Panel Radiator Double Convector - 8569

Stelrad Compact K2 Type 22 700 x 1400mm Double Panel Radiator Double Convector - 143857

Stelrad Compact K2 Type 22 600 x 900mm Double Panel Radiator Double Convector - 143787

Stelrad Compact P+ Type 21 450 x 600mm Double Panel Radiator Single Convector - 143700

Stelrad Compact P+ Type 21 600 x 1400mm Double Panel Radiator Single Convector - 143773

Stelrad Compact P+ Type 21 450 x 1100mm Double Panel Radiator Single Convector - 143705

Stelrad Planar K1 Type 11 500 x 600mm Single Panel Radiator Single Convector - 140927

Stelrad Compact K1 Type 11 450 x 400mm Single Panel Radiator Single Convector - 143680

Stelrad Compact K1 Type 11 450 x 1000mm Single Panel Radiator Single Convector - 143686

Stelrad Compact K1 Type 11 700 x 1400mm Single Panel Radiator Single Convector - 143821

Stelrad Planar K1 Type 11 400 x 400mm Single Panel Radiator Single Convector - 140908

Stelrad Compact K2 Type 22 450 x 1200mm Double Panel Radiator Double Convector - 143724

Stelrad LST Standard K2 Type 22 500 x 760mm Double Panel Radiator Double Convector - 145017

Stelrad Compact P+ Type 21 600 x 900mm Double Panel Radiator Single Convector - 143769

Stelrad Compact with Style K1 Type 11 600 x 400mm Single Panel Radiator Single Convector - 7461104

Stelrad Compact K1 Type 11 450 x 1100mm Single Panel Radiator Single Convector - 143687

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