Panel radiators

Panel radiators are the radiators most of us picture: flat, wall-mounted and quietly getting on with the job. They are the everyday standard for good reason, offering strong, reliable heat at a sensible price, which is why they heat the majority of UK rooms. The one thing worth understanding before you buy is how single and double panels, and convector fins, change the output, because that is how you match a cost-effective panel to the heat your room needs.

What are panel radiators?

A panel radiator is a flat steel radiator made up of one or more heated panels, usually with convector fins behind them. The fins are the wavy strips welded to the back of the panel; they increase the surface area and draw air up across the radiator, boosting output. Panels come as single or double, with one or two sets of fins, and that combination is what the type numbers describe: a single panel with one fin set at the slim end, a double panel with two fin sets at the high-output end. They mount flat to the wall, suit almost any room and are the most widely available and affordable type.

Single vs double panel

Double panels give more heat. A single-panel radiator has one heated face and stays slim against the wall; a double-panel has two, so it gives out noticeably more heat from the same height and width, projecting a little further into the room. Add convector fins and the output rises again. So if a single panel that fits your wall is short on output, stepping up to a double panel, or a double panel with double convectors, is the easy way to hit the figure without a wider radiator. Match the panel and convector count to your room's BTU requirement.

Cost-effective heating

The reason panel radiators dominate is value. They give a lot of heat for the money, they are simple to fit and replace, and they come in every size you are likely to need, so they suit whole-home heating where you want reliable warmth without a designer price tag. Most are white, which blends with skirting and walls, though anthracite and other finishes are available if you want the panel to be a little more than purely functional. For everyday rooms, a well-sized panel radiator is hard to beat on cost per unit of heat.

Where panel radiators suit

Panel radiators suit almost anywhere, which is the point of them. In bedrooms, living rooms, dining rooms and hallways, a well-sized panel gives reliable warmth without drawing attention, and the slim single-panel versions tuck neatly under windows and onto shorter walls. Where a room needs more heat, a double panel with convectors delivers it from the same wall space. The main times to look elsewhere are when you want the radiator to be a feature, where a designer or vertical model fits better, or in a period home where a column or traditional style suits the character. For everyday, value-led heating across the house, panels are the default for good reason. They are also the easiest type to find in any size, so matching one to a specific gap on the wall and a specific output is rarely a problem.

Panel radiator FAQs

What's the difference between a single and double panel radiator?

A single-panel radiator has one heated panel and is slim; a double-panel has two and gives out more heat from the same height and width, sticking out a little further. Convector fins behind the panels add more output again. Choose the combination that meets your room's heat requirement.

Are panel radiators good?

Yes, for value and reliability they are hard to beat, which is why they are the most common type in UK homes. They deliver strong output for the price and suit almost any room. For a statement piece you might choose a designer radiator, but for everyday heating a panel is the sensible choice.

What do P+, K1 and K2 mean?

They are shorthand for the panel and convector arrangement. Broadly, a single panel with a single convector is the slim, lower-output option, while a double panel with double convectors gives the highest output. The exact codes vary by brand; what matters is that more panels and fins mean more heat, so match the output to your room.

How do I know what output I need?

Work it out from your room with a BTU calculation, then pick a panel whose output meets or exceeds it. See what size radiator do I need? and how to choose the right radiator

Shop panel radiators for reliable, cost-effective heat, and read how to choose the right radiator to size them Trusted since 1999, with free UK delivery and 365-day returns. Big brands, small prices.