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Type 11 Single Panel Radiators
Type 11 radiators, also known as K1 or single panel single convector radiators, have one heating panel with one row of convector fins behind it. Hot water passes through the radiator, warming the panel and fins, which then heat the surrounding air. It’s a straightforward setup that gives you a slimmer radiator than many double panel alternatives.
With one panel and one set of fins, Type 11 radiators usually project less from the wall than Type 21 radiators or Type 22 radiators of a similar size. That makes them useful where you want to keep the radiator profile down, such as hallways, bedrooms or other busier spaces. Most of the range is horizontal, with selected vertical models available too.
Slim doesn’t automatically mean low heat. Our Type 11 single convector radiators cover everything from compact sizes to much wider models, with outputs ranging from under 1000 BTU to above 5000 BTU. Work out how much heat the room needs first, then choose the height and width that give you the required output without taking up more space than necessary.
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Need help with Type 11 Single Panel Radiators?
Recently Reviewed
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15th August 2026None
Melvyn J from - verified purchaser
Single panel radiator
18th July 2026It’s a great radiator it looks great on the wall in the bedroom👍
Trevor P from South Yorkshire- verified purchaser
Quality radiator
24th March 2026Good value for the money
FRED L from West Yorkshire- verified purchaser
Radiator
20th March 2026Good radiator well finished and delivered promptly works really well lots of heat solved the problem of a cold corner in the house.
Robert G from - verified purchaser
FAQ's
What is a Type 11 radiator?
A Type 11 radiator (also known as a K1 or single panel radiators) is a type of central heating radiator that as one heating panel with a single row of convector fins behind it.
The fins increase the radiator's surface area, helping transfer heat into the room, while its single panel design gives it a slimmer profile than double panel radiators.
What's the difference between Type 11, Type 21 and Type 22 radiators?
The number refers to the number of panels and rows of convector fins.
- Type 11 has one panel and one row of fins
- Type 21 has two panels and one row of fins
- Type 22 has two panels and two rows of fins
Generally, adding panels and fins increases heat output but also makes the radiator deeper, so Type 11 radiators are a good choice when you want a radiator without the bulk.
What are the benefits of Type 11 radiators?
- Slim profile: Their single panel design makes them shallower than Type 21 and Type 22 radiators, helping save space in smaller rooms.
- Efficient heat distribution: Convector fins increase the radiator's surface area, helping to transfer heat throughout the room.
- Range of sizes: They’re available in different heights and widths, making it easier to find a Type 11 radiator to suit your space and required heat output.
- Versatile design: Their simple, practical appearance works well across a range of rooms and interior design preferences.
What rooms are Type 11 radiators best for?
Type 11 radiators are particularly well suited to smaller rooms and spaces where a slimmer radiator is preferred, such as bedrooms, hallways, home offices, bathrooms and kitchens.
For larger or colder rooms that require a higher heat output, a Type 21 or Type 22 radiator may be more suitable.
How do I choose the right Type 11 radiator?
Start by working out how much heat your room needs in BTUs, taking into account factors such as room size, insulation, windows and external walls.
Need help doing this? Check out our guide teaching you how to calculate BTU.
Choose a Type 11 radiator with a BTU output that meets the room's requirements.
Be sure to also check its height, width and depth to make sure it fits your available wall space. A wider or taller Type 11 radiator can provide a higher output without necessarily needing a deeper radiator.