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Horizontal Radiators

Horizontal radiators are the go-to for reliable, even warmth. They sit neatly under windows to counter cooler air and keep living spaces comfortable day to day. To choose the right model, start with your BTU requirement so the output matches your room size. Single panels suit smaller rooms, while double panels boost heat where you need a bit more.

Measure width, height and projection so your designer horizontal radiator fits your space and furniture. Replacing an old unit? Check pipe centres to help reduce extra plumbing. Low-level options work well under bay windows or long runs of glazing, while compact lengths are ideal for utility rooms, hallways and snug layouts.

From flat panels to oval tubes and classic horizontal column designs, there’s a style to suit every interior. Keep it clean with white, go modern with anthracite or black, or choose a raw metal finish for character. Some ranges also include electric models if you’re not on central heating. Finish the look with co-ordinated valves and accessories for a polished result.

Recently Reviewed

Keswick 600 x 605mm Cast Iron Style Traditional 3 Column Regal Green Radiator

£259.95

In Stock

A beautiful radiator

22nd July 2026

Stunning radiator, exactly the colour we were after. Very happy with our purchase.

Zoe A from West Sussex- verified purchaser

Keswick 750 x 785mm Horizontal Radiator Matt Black 4 Column

£299.95

In Stock

Heavy

20th July 2026

Buy the feet, lovely radiator, but the brackets alone won’t hold it.

Mike M from Inverclyde- verified purchaser

Keswick 450 x 1414mm Cast Iron Style Traditional 3 Column Antique Brass Radiator

£449.95

In Stock

Classy

20th July 2026

Lovely radiator, the photos don’t do the finish justice.

Mike M from Inverclyde- verified purchaser

Urban Horizontal Radiator - White - Double Panel (600mm High)

£199.95

In Stock

New radiators

19th July 2026

Swapped out my customers standard radiators for these designer ones. They look much better and are really heavy and solid built. Customer is over the moon.

shane S from Hampshire- verified purchaser

FAQ's

Why choose Victorian Plumbing?

As the UK’s largest bathroom retailer, we offer a wide choice of horizontal radiators in sizes, styles and heat outputs for every home. Many are in stock for faster delivery, and our tools and support help you find the right fit with confidence.

Wide range of styles and finishes. Flat panel, oval tube and horizontal column radiators for every space.
Easy configuration. Choose your orientation, colour, height and width, and see your BTU and price update instantly.
In-stock options for faster delivery. No long waits, with next day delivery available on selected radiators.
Free standard delivery over £499. Clear delivery options displayed at checkout.
0% finance on orders over £250. Spread the cost in a way that suits your budget.
Rated Excellent by thousands of customers. Trusted for quality products and reliable service.
Helpful tools and guidance. Use our BTU calculator and buying guides, or speak to our team.

Not sure where to start? These quick guides will help you choose the right horizontal radiator.

What are horizontal radiators?

They’re the classic, under-window style used in most homes. They counter cooler air coming from glazing and distribute warmth evenly across the room.

Why choose a horizontal radiator?

Horizontal radiators offer consistent, everyday heat and are easy to position along longer walls. With plenty of widths, heights and finishes available, it’s simple to match both performance and style.

Are horizontal radiators as efficient as vertical ones?

Yes, horizontal radiators can be just as efficient as vertical radiators, as long as the BTU output is correctly matched to your room size. The choice usually comes down to layout, wall space and style. If you’re unsure, try our How to Calculate BTU guide to find the right output for your space.

What material should I choose?

Aluminium heats up quickly and is lightweight, making alumium radiators ideal for fast warmth. Steel offers steady, reliable heat and a broader choice of designs. Match the material you prefer, then size the BTU correctly for comfort.

What size do I need?

Start with the BTU requirement for your room. Then select a height and width that fits your wall space. Double panel options offer more heat where needed.

Can I customise my radiator?

Yes, many of our horizontal radiators are fully configurable. You can choose the orientation, colour, height and width, and your BTU and price update instantly. This makes it simple to find a radiator that fits both your layout and heat requirement.

Can I replace a vertical radiator with a horizontal one?

Yes, but the pipe centres may differ, so pipework might need adjusting. Choosing a similar or higher BTU ensures the room stays warm.

Do I need new valves?

Often, yes. Match valve orientation to your pipework:

Angled valves: Pipes from the floor, side connections
Straight valves: Pipes from the floor, bottom connections
Corner valves: Pipes from the wall, either connection type

Choose a finish that complements your radiator.

Horizontal Radiators

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