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

First, match the radiator’s BTU (Delta 50) band to the heat requirement of the room — the site groups radiators into ranges such as 1–999, 1000–1999, 2000–2999 and up to 10,000–25,000 BTU so you can pick a product that meets your target. As a quick guide, a small bedroom often sits in the 1000–1999 BTU band, while a medium living room commonly needs 3000–4999 BTU; larger open-plan spaces may need 5000–7000 BTU or more. Then choose a physical size that fits your wall: common heights include 600mm (many options) and tall verticals at 1600–1800mm if you have limited wall width. For example, if your living room needs about 3500 BTU you might choose a horizontal double panel radiator in the 600 x 1215mm or 600 x 1440mm sizes shown on the site.

Which radiator material is best for speed of heat and long-term performance?

Aluminium radiators heat up quickly and are lightweight, so they’re ideal if you want fast warmth and lower mass. Steel and mild steel radiators (several hundred listings) are heavier, retain heat longer and give a steadier, more even output once warm, so they suit living areas where sustained heat is useful. Each material has trade-offs: aluminium is faster but can cool quicker, while steel stores heat but responds more slowly. If you want fast-response heating in a small bathroom, aluminium suits well; for a family lounge where retained heat matters, a mild-steel panel radiator is often better.

Should I choose a vertical or horizontal radiator for a small bathroom or hallway?

Vertical radiators (about 501 products) are perfect where wall width is limited — tall models such as 1600–1800mm let you fit a high-output unit in a narrow space and free up low wall area for furniture. Horizontal radiators (around 609 products) work best under windows or across longer walls and are often available in wider options like 910–1440mm to deliver higher outputs at 600mm height. For a narrow hallway, a vertical double-flat-panel at 1800 x 455mm gives strong heat without crowding the floor; for a bathroom under a window, a horizontal 600 x 1215mm double panel provides good output and sits neatly beneath the sill.

What’s the practical difference between traditional column radiators and modern flat panel designer types?

Traditional column radiators (for example the Park Lane Colosseum range) use multiple bars or columns to give high surface area and a classic look; double or triple bar columns also make handy towel spaces in a bathroom. Modern flat-panel designer radiators (like DuraTherm double panels) have a slim, minimalist face and often deliver equivalent output in a shallower profile, so they suit contemporary interiors and tighter clearances. Choose a column if you want period styling and a tactile feel; pick a flat panel if you prefer a sleek, low-profile radiator that tucks close to the wall.

Do different colours or finishes affect performance or are they just aesthetic choices?

Colour and finish are mostly aesthetic — the catalogue shows many options such as white (551 items), anthracite (239), black (185), chrome and brass — but finish can influence maintenance and where you’ll use the radiator. For example, chrome or brass-toned radiators work well in bathrooms because they complement taps and fittings, while white is the most common, usually cost-effective choice for living spaces. Very dark finishes like anthracite will show dust and fingerprints more readily, so you might prefer white or chrome in a busy family area.

Page 10 of 34 Buy Central Heating Radiators

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

4.9

37 ratings

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£109.00 inc
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Save £10.99 | Was £119.99

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

4.9

37 ratings

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£69.99 inc
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k-rad-kansas-2000-x-374mm-oval-tube-vertical-designer-radiator-anthracite

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£69.99 inc
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stelrad-softline-compact-k2-700-x-900mm-double-panel-radiator-double-convector-white-80702209

Save £31.00 | Was £379.00

stelrad-compact-k2-radiator-450mm-x-1400mm-double-panel-double-convector-143725

Stelrad Compact K2 Type 22 450 x 1400mm Double Panel Radiator Double Convector - 143725

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£188.80 inc
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Save £23.32 | Was £212.12

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

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£190.99 inc
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Save £23.59 | Was £214.58

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 Softline Compact K2 600 x 1100mm Double Panel Radiator Double Convector White - 80602211

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£169.98 inc
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Save £15.97 | Was £185.95

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
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Save £50.81 | Was £379.91

solaro-single-panel-1800-x-185mm-vertical-designer-aluminium-radiator-matt-white

Solaro Malmesbury Single Panel 1800 x 185mm Vertical Designer Aluminium Radiator Matt White

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£235.00 inc
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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
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Save £15.65 | Was £126.01

Solaro Xcite 1775 x 450mm Vertical Designer Radiator – White

£249.38 inc
VAT

duratherm-vertical-oval-tube-single-panel-designer-radiator-1800-x-240mm-white

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

5.0

843 ratings

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£69.99 inc
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Save £15.01 | Was £85.00

K-Rad Denver 500 x 1000mm Flat Panel Designer Radiator, White - DEN5001000WT

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£209.30 inc
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Save £6.25 | Was £215.55

stelrad-compact-k2-radiator-450mm-x-900mm-double-panel-double-convector-143721

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

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£124.97 inc
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Save £19.25 | Was £144.22

stelrad-compact-k2-radiator-450mm-x-1800mm-double-panel-double-convector-143727

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

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£242.68 inc
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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
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Save £17.41 | Was £185.18

stelrad-compact-k1-radiator-600mm-x-1200mm-single-panel-single-convector-143754

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

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£119.67 inc
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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

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£216.83 inc
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Save £26.79 | Was £243.62

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

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£109.04 inc
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Save £15.33 | Was £124.37

stelrad-compact-p-radiator-450mm-x-1000mm-double-panel-single-convector-143704

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

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£120.87 inc
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Page 10 of 34 Central Heating Radiators

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

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

K-Rad Kansas 2000 x 374mm Oval Tube Vertical Designer Radiator Anthracite

Eastlake Rivassa 1800 x 473mm Traditional 2 Column Vertical Radiator - Bronze Effect

Solaro Malmesbury Single Panel 1200 x 375mm Vertical Designer Aluminium Radiator Matt White

Eastlake Imperia 600 x 1460mm Traditional 6 Column Radiator White

Eastlake Type 10 940 x 600mm Vertical Designer Aluminium Radiator White & Brushed Brass

Solaro Peretti 600 x 660mm Designer Aluminium Radiator Polished Aluminium

Eastlake Rivassa 1800 x 473mm Traditional 3 Column Vertical Radiator - Bronze Effect

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

Stelrad Softline Compact K2 700 x 900mm Double Panel Radiator Double Convector White - 80702209

Eastlake Rivassa 600 x 833mm Traditional 3 Column Radiator - Bronze Effect

Solaro Guardia 1800 x 280mm Vertical Designer Aluminium Radiator Matt White

Solaro Guardia 600 x 660mm Horizontal Designer Aluminium Radiator Matt Black

Solaro Peretti 1800 x 280mm Designer Aluminium Radiator Matt Anthracite

Terma Rolo Room True Copper Designer Radiator 1800 x 370 mm

Stelrad Compact K2 Type 22 450 x 1400mm Double Panel Radiator Double Convector - 143725

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

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

Stelrad Softline Compact K2 600 x 1100mm Double Panel Radiator Double Convector White - 80602211

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

Solaro Malmesbury Single Panel 1800 x 185mm Vertical Designer Aluminium Radiator Matt White

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

Solaro Xcite 1775 x 450mm Vertical Designer Radiator – White

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

K-Rad Denver 500 x 1000mm Flat Panel Designer Radiator, White - DEN5001000WT

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

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

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

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

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

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