How do you choose the best radiators?

We rank manufacturer-published output at Δt50 against price, specification completeness, warranty, availability and reader click-through. Commission plays no part in the ranking.

What is Δt50 and why does it matter?

Δt50 (75/65/20°C) is the UK standard test condition for radiator output under BS EN 442. Outputs quoted at other conditions are not comparable, so always check the figure is Δt50 before comparing two radiators.

Do you sell radiators?

No. Economy Radiators is an independent guide. Some links to retailers earn us a small commission at no extra cost to you, and that never changes which radiator we recommend.

Best buys 2026

The best radiators you can buy in the UK right now

Picked from 333 sized radiators across six types, every output quoted at Δt50 from the manufacturer’s own data sheet. We don’t sell radiators — we just tell you which one fits.

How this shortlist is built. Every wet radiator here is listed at its manufacturer-published output at Δt50 (75/65/20°C), the UK standard under BS EN 442, with the data sheet linked on each card — so you can check our figures against the maker’s. We rank on heat for the money, how complete and verifiable the specification is, warranty, availability and how often readers click through. Commission never moves a radiator up this page. It decides only which shop we send you to when several sell the same radiator, and some of those links earn us a small commission at no cost to you. We don’t sell radiators.

Panel radiators3 picks · 131 sizes Column radiators4 picks · 97 sizes Designer & vertical radiators4 picks · 28 sizes Towel radiators4 picks · 53 sizes Electric radiators4 picks · 19 sizes Oil-filled radiators2 picks · 5 sizes

Best panel radiators

The standard plumbed radiator — and the best heat for the money in almost every central-heating room.

Our top pick

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Stelrad Compact K2 (Type 22) 600 x 800mm

4,730 BTU · 1,386 W · 600 × 800 mm · 100mm deep · 10-year warranty

The default answer for most UK living rooms. Two panels and two sets of fins give roughly double a K1's output from the same width of wall - a 600 x 1000 K2 puts out 5,911 BTU where the K1 manages 3,345. If you only learn one radiator spec, learn this one.

Why it works

Roughly twice a K1's output from the same wall width
Best output-per-pound of any wet radiator type
Stocked by every merchant in the country
10-year manufacturer warranty

What to watch

100mm deep - it projects, and it is visible
Heavier; needs sound fixings
Convector fins collect dust and need vacuuming

Best for Living rooms, kitchens, dining rooms and any room with a BTU target above roughly 3,500.

On a heat pump The usual starting point for a heat-pump retrofit, but still check the low-temperature output - many rooms need the next size up again.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Compact Horizontal data sheet

Also worth a look

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Stelrad Compact K1 (Type 11) 600 x 1400mm

4,683 BTU · 1,372 W · 600 × 1400 mm · 61mm deep · 10-year warranty

The single-panel workhorse. Stelrad has made radiators in Britain since 1936 and is the UK's biggest domestic radiator brand, so a Compact is the size that fits, the output that's published, and the one your plumber has fitted a hundred times.

Why it works

Slimmest profile at 61mm - barely intrudes into the room
Cheapest way to hit a modest BTU target
10-year manufacturer warranty
Every plumber knows the bracket and valve centres

What to watch

Lowest output per metre of wall - a big room needs a very long one
Plain white steel; no design statement

Best for Small, well-insulated rooms, box bedrooms, studies and cloakrooms where the BTU target is under about 3,500.

On a heat pump Not ideal on its own. At heat-pump flow temperatures a K1 loses roughly half its Δt50 output - size up to a K2 or go bigger.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Compact Horizontal data sheet

Also worth a look

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Stelrad Compact P+ (Type 21) 600 x 1100mm

5,051 BTU · 1,480 W · 600 × 1100 mm · 77mm deep · 10-year warranty

The sensible middle. A P+ adds a second panel but only one set of convector fins, so you gain roughly 35-40% more heat than a K1 for only 16mm more depth - the best compromise when a K1 won't quite do it and a K2 sticks out too far.

Why it works

Noticeably more output than a K1 in the same width
Only 77mm deep - still sits flat behind furniture
Flat front panel looks tidier than a K2's double profile
10-year manufacturer warranty

What to watch

Costs more than a K1 for output you may not need
Stocked less widely than K1 and K2

Best for Bedrooms, hallways and medium rooms where a K1 falls a few hundred BTU short.

On a heat pump Workable if you oversize. Check the Δt30/Δt40 figures before you commit.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Compact Horizontal data sheet

Full panel guide →

Best column radiators

Period looks and strong output, in steel or real cast iron.

Our top pick

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Stelrad Column Horizontal 3 Column 600 x 1042mm

4,573 BTU · 1,340 W · 600 × 1042 mm · 100mm deep · 10-year warranty

Three columns - the sweet spot of output, depth and price. Steel columns give you the period silhouette of a cast-iron radiator with a fraction of the weight, a normal price and no bespoke lead time - and because they hold more water they keep radiating gently after the boiler drops out.

Why it works

Classic column look in white or a colour
High output for the width, especially in 3 and 4 column
Holds more water, so heat lingers after the boiler cycles off
Far lighter and cheaper than real cast iron

What to watch

Deeper than a panel radiator
Dust settles between the columns
Coloured finishes are made to order

Best for Period living rooms, hallways and kitchens where the radiator is on show, and high-ceilinged rooms that need strong output.

On a heat pump A good heat-pump choice - the large water volume and surface area cope better than a panel at low flow temperatures.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Column Horizontal data sheet

Also worth a look

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Stelrad Column Horizontal 4 Column 600 x 858mm

4,901 BTU · 1,436 W · 600 × 858 mm · 135mm deep · 10-year warranty

Four columns - maximum output and the most substantial period look. Steel columns give you the period silhouette of a cast-iron radiator with a fraction of the weight, a normal price and no bespoke lead time - and because they hold more water they keep radiating gently after the boiler drops out.

Why it works

Classic column look in white or a colour
High output for the width, especially in 3 and 4 column
Holds more water, so heat lingers after the boiler cycles off
Far lighter and cheaper than real cast iron

What to watch

Deeper than a panel radiator
Dust settles between the columns
Coloured finishes are made to order

Best for Period living rooms, hallways and kitchens where the radiator is on show, and high-ceilinged rooms that need strong output.

On a heat pump A good heat-pump choice - the large water volume and surface area cope better than a panel at low flow temperatures.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Column Horizontal data sheet

Also worth a look

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TALL Victorian 3 Column Cast Iron Radiator — 10 sections

5,120 BTU · 1,501 W · 760 × 650 mm · 120mm deep · 10 sections · from £264.00

Real cast iron, hand-built to order in Britain one section at a time - so instead of picking the nearest size off a shelf you specify the exact output your room needs. The thermal mass is the point: it takes longer to warm up and then radiates for a long while after the heating goes off.

Why it works

Built to your exact BTU, section by section
British made and hand finished, including Farrow & Ball colours
Huge thermal mass - stays warm long after the boiler stops
A genuine centrepiece, not a compromise

What to watch

Roughly 10kg per section - needs a solid wall or floor stays, and two people to move
2-4 week lead time, made to order and non-returnable
Slow to respond, so less suited to rooms you heat in short bursts

Best for Period properties, hallways and living rooms where the radiator is meant to be seen and the room is heated for long stretches.

On a heat pump Excellent on paper thanks to the surface area, but the slow response suits steady low-temperature running rather than quick boosts.

Check price at Cast In Style →Retailer-published output per section · Cast In Style product page

Also worth a look

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TALL Victorian 4 Column Cast Iron Radiator — 9 sections

5,508 BTU · 1,614 W · 760 × 567 mm · 142mm deep · 9 sections · from £290.40

Why it works

Built to your exact BTU, section by section
British made and hand finished, including Farrow & Ball colours
Huge thermal mass - stays warm long after the boiler stops
A genuine centrepiece, not a compromise

What to watch

Roughly 10kg per section - needs a solid wall or floor stays, and two people to move
2-4 week lead time, made to order and non-returnable
Slow to respond, so less suited to rooms you heat in short bursts

Best for Period properties, hallways and living rooms where the radiator is meant to be seen and the room is heated for long stretches.

On a heat pump Excellent on paper thanks to the surface area, but the slow response suits steady low-temperature running rather than quick boosts.

Check price at Cast In Style →Retailer-published output per section · Cast In Style product page

Full column guide →

Best designer & vertical radiators

Serious output from a narrow strip of wall, where a long horizontal radiator won’t fit.

Our top pick

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Stelrad Vertical Ultra 1840 x 470mm

5,036 BTU · 1,476 W · 1840 × 470 mm · 10-year warranty

A flat-fronted vertical that actually puts out the heat. The trap with designer radiators is buying a beautiful panel that under-heats the room; the Vertical Ultra's 2040 x 670 delivers 8,107 BTU, which is more than a 600 x 1400 K2 - from a strip of wall two feet wide.

Why it works

Serious output from a narrow footprint
Clean flat front - no visible fins or columns
Frees up a whole wall for furniture
Some sizes take a clip-on towel rail

What to watch

Costs considerably more than a horizontal panel of the same output
Tall units need specific valve sets and a solid wall
Heat sits high in the room until it circulates

Best for Hallways, kitchens, narrow rooms and any wall where a long horizontal radiator simply won't fit.

On a heat pump Check the low-temperature figures carefully - slim designer panels lose proportionally more output than finned types as flow temperature drops.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Also worth a look

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Stelrad Column Vertical (2 Column) 2500 x 444mm

5,253 BTU · 1,539 W · 2500 × 444 mm · 59mm deep · 10-year warranty

Period looks on a vertical footprint, and only 59mm deep - slimmer than a single panel radiator. The 2500mm version is the one to know: 5,253 BTU from 444mm of wall.

Why it works

Only 59mm deep - the slimmest option here
Column styling suits period and modern rooms alike
Very tall sizes available for stairwells

What to watch

Modest output for its height
2500mm needs real ceiling height and careful fixing
Made to order in colours

Best for Narrow hallways, stairwells and between-window gaps in period homes.

On a heat pump Column construction copes better than flat panels at low flow temperatures.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Column Vertical data sheet

Also worth a look

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Stelrad Compact Vertical K2 1800 x 400mm

5,405 BTU · 1,584 W · 1800 × 400 mm · 104mm deep · 10-year warranty

A standard Type 22 turned on its end. You get double-panel, double-convector output - 8,107 BTU from the 1800 x 600 - at ordinary Compact prices rather than designer prices. The least glamorous way to solve a narrow wall, and usually the cheapest.

Why it works

Designer-radiator output at panel-radiator money
Same proven K2 construction and 10-year warranty
Widely stocked

What to watch

Looks like a panel radiator stood up, because it is
Only a few sizes
Deep for a vertical at 104mm

Best for Hallways and kitchens where you need vertical output but don't want to pay a designer premium.

On a heat pump Same caveats as any Type 22 - check low-temperature output.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Compact Vertical data sheet

Also worth a look

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Stelrad Caliente Vertical 1800 x 660mm

5,326 BTU · 1,561 W · 1800 × 660 mm · 10-year warranty

Round-tube vertical - the classic modern designer shape. The double-tube 1800 x 660 hits 8,138 BTU, which is genuine living-room output from a tall narrow unit; the single-tube versions are for looks and modest heat.

Why it works

Tube design suits contemporary interiors
Double-tube versions have real output
Wide choice of widths

What to watch

Single-tube versions under-heat larger rooms - check the figure
Premium price
Tubes are fiddly to dust

Best for On-show walls in open-plan rooms and modern hallways.

On a heat pump Double-tube only, and size up.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Full designer guide →

Best towel radiators

The bathroom question is simple: will it heat the room, or only the towels?

Our top pick

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Stelrad Caliente Rail (Straight Double) 1199 x 450mm

2,962 BTU · 868 W · 1199 × 450 mm · 10-year warranty

The towel rail that will actually heat the bathroom. Most ladder rails top out around 1,500 BTU, which warms towels and little else; the double-tube Caliente at 1791 x 600 delivers 5,698 BTU - enough to be the room's only heat source in a normal family bathroom.

Why it works

Genuine room-heating output, not just towel warming
Available as central heating, electric or dual-fuel
Wide bar spacing takes thick towels
10-year warranty

What to watch

Double tubes project further from the wall
Dearer than a basic chrome ladder rail
Tall sizes need the mixer or shower valve planned around them

Best for Family bathrooms and en-suites that need the towel rail to do the actual heating.

On a heat pump Bathrooms are the hardest room for a heat pump - take the low-temperature output seriously or add a second emitter.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Also worth a look

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Stelrad Classic Towel Rail (White) 1211 x 600mm

2,339 BTU · 686 W · 1211 × 600 mm · 10-year warranty

The same rail as the chrome version, in white - and that one change is worth roughly 50% more heat. Stelrad's own figures put the 1744 x 600 at 3,410 BTU in white against 2,274 BTU in chrome. If output matters more than the shine, this is the cheap win almost nobody takes.

Why it works

Roughly 50% more output than the identical rail in chrome
Cheaper than chrome
Disappears against a white wall

What to watch

Plain looking next to a chrome ladder
White can yellow over many years above a radiator-hot surface

Best for Bathrooms where hitting the BTU target matters more than the finish.

On a heat pump The finish choice matters even more at low flow temperatures - go white.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Also worth a look

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Stelrad Caliente Rail (Straight Single) 1199 x 600mm

2,709 BTU · 794 W · 1199 × 600 mm · 10-year warranty

The single-tube Caliente is the everyday bathroom rail - slimmer and cheaper than the double, with enough output for a small bathroom or en-suite on its own and plenty for towels alongside another radiator.

Why it works

Slim profile in a tight bathroom
Good range of heights and widths
Electric and dual-fuel options
10-year warranty

What to watch

Under-heats a larger bathroom on its own
Chrome versions output less than painted

Best for En-suites, cloakrooms and small bathrooms, or as towel warming next to a panel radiator.

On a heat pump Undersized for a heat pump in most bathrooms - go double-tube.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Also worth a look

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Stelrad Classic Towel Rail (Chrome) 1744 x 600mm

2,274 BTU · 667 W · 1744 × 600 mm · 10-year warranty

The chrome ladder rail everyone pictures when they think of a heated towel rail. Buy it for the look, but budget for the output loss: chrome plating insulates, and Stelrad's figures show the same rail losing about a third of its heat compared with white.

Why it works

The classic bathroom look
Easy to wipe clean
Matches chrome taps and shower fittings

What to watch

Around a third less heat than the identical white rail
Usually needs a second heat source in a family bathroom
Shows limescale and fingerprints

Best for En-suites and cloakrooms, or bathrooms that already have another radiator.

On a heat pump Avoid on a heat pump unless you have other heat in the room.

Check price at Plumbworld →Manufacturer data at Δt50 (75/65/20°C), BS EN 442 · Stelrad Radiator Book

Full towel guide →

Best electric radiators

No plumbing, room-by-room control — for extensions, flats and rooms off the heating loop.

Our top pick

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Ecostrad iQ Ceramic 1500W

5,118 BTU · 1,500 W · 567 × 625 mm · 80mm deep · 10-year warranty

The best-selling smart electric radiator in the UK by a distance - over 82,000 units. Ceramic core so it keeps giving heat after the element cuts, WiFi and voice control, open-window detection and a motion sensor that drops the temperature when the room empties. That last feature is what actually cuts the bill.

Why it works

Ceramic core holds heat after the element switches off
WiFi, app and voice control with 24/7 programming
Motion sensing and open-window detection genuinely reduce running hours
10-year warranty on the body

What to watch

Electricity costs roughly 3-4x gas per kWh - the savings come from heating less, not cheaper heat
Higher upfront cost than a plain panel heater
Needs WiFi for the smart features to earn their keep

Best for Extensions, loft conversions, garden rooms, flats and any room off the central-heating loop where you want proper control.

Check price at Electric Radiators Direct →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · Ecostrad iQ Ceramic data sheet

Also worth a look

Adax Neo 1400W

4,777 BTU · 1,400 W · 5-year warranty

Norwegian panel heater built for a country that takes electric heating seriously. The low-profile 330mm-high version fits under a window or along a skirting where nothing else will, and the styling is the cleanest here.

Why it works

Very slim and genuinely good looking
Low-height versions fit under windows and low sills
WiFi and voice control on the Neo WiFi
5-year warranty

What to watch

Convector, so no residual heat once it stops
Low-height models need a longer run of wall
Premium price for a convector

Best for Under windows, in low-sill rooms and anywhere the heater has to look good.

Check price at Electric Radiators Direct →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · Adax Neo product page

Also worth a look

Haverland Designer RC Wave 1400W

4,777 BTU · 1,400 W · 3-year warranty

The proven one. Haverland has been building electric radiators since 1971 and the RC Wave has sold over 40,000 units in the UK, which means the failure modes are known and parts exist. The lifetime body warranty tells you what they think of it.

Why it works

Lifetime warranty on the radiator body
Very long track record in the UK
Self-programming versions learn your routine
Simple to live with

What to watch

Costs more than newer budget smart radiators
Styling is dated next to the Ecostrad
Smart features are behind the market leaders

Best for Rooms you want to fit once and forget about, and landlords who care about warranty cover.

Check price at Electric Radiators Direct →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · Electric Radiators Direct product range

Also worth a look

Dimplex Q-Rad 1500W

5,118 BTU · 1,500 W

Low thermal mass, which is the opposite of the ceramic approach and right for a different job: the Q-Rad heats up fast and stops fast, so it tracks a thermostat closely instead of coasting. Best where you want heat on demand rather than a steady background warmth.

Why it works

Fast to heat and fast to stop - responsive to the thermostat
Established brand with wide availability
Five outputs from 500W to 2000W
RF and WiFi control versions

What to watch

Little residual heat once it switches off
Less comfortable than a ceramic or oil-filled radiator for all-evening use
Plain styling

Best for Rooms used in bursts - home offices, spare rooms, workshops - where you want heat quickly and no waste afterwards.

Check price at Wickes →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · Dimplex Q-Rad product page

Full electric guide →

Best oil-filled radiators

Plug-in heat tonight, with the gentle warmth that lingers after the element cuts out.

Our top pick

Sealey Oil-Filled Radiator RD1500

5,118 BTU · 1,500 W · £64.95 at Tooled Up

Trade-grade rather than supermarket-grade, at supermarket money. Sealey build these for workshops and site offices, which is a harder life than a spare bedroom - and the RD2500T's thermostat and 24-hour timer are the two features that decide whether an oil-filled radiator is cheap or ruinous to run.

Why it works

Thermostat and 24-hour timer on the RD2500T - the controls that actually cut the bill
Built for workshop use
Three outputs from 800W to 2500W
Plug in and go - no installation at all

What to watch

Portable, so it takes up floor space
Slow to warm up, as all oil-filled radiators are
No app or smart control

Best for Rooms without central heating, spare rooms, workshops, garden offices and anywhere you need heat tonight with no installation.

Check price at Tooled Up →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · Tooled Up product listing

Also worth a look

De'Longhi Dragon 4 2000W TRD40820E

6,824 BTU · 2,000 W

The oil-filled radiator most people mean when they say oil-filled radiator. The Dragon 4's enlarged fins claim about 25% more surface area than a plain column, which is why it feels warmer at the same wattage, and the 2.5kW TRD41025T adds a 24-hour mechanical timer.

Why it works

Larger fin area than most - more heat felt per watt
Thermostat, anti-frost setting and 24-hour timer on the TRD41025T
Widely available and well supported
Quiet, with no fan

What to watch

At 2.5kW on full it is genuinely expensive to run - use the thermostat
Heavy to move despite the castors
Dearer than budget oil-filled radiators

Best for Living rooms and larger bedrooms without central heating, used for whole evenings rather than short bursts.

Check price at Amazon UK →Electric heaters convert electricity to heat at the point of use, so 1 W = 3.412 BTU/hr · De'Longhi product page

Full oil filled guide →

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