K Rad Type 21 Central Heating Radiator 1200mm Wide White

400mm High

£124.95

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K Rad Type 21 Central Heating Radiator 1200mm Wide White

£124.95

The K Rad Type 21 Central Heating Radiator combines effective heating performance with a clean, contemporary design suitable for living rooms, bedrooms, kitchens and other areas of the home. Its double panel and single convector construction provides excellent heat output while maintaining a practical depth, finished in gloss white RAL 9016 for a neat appearance.

Available in three heights of 400mm, 500mm and 600mm, all with a 1200mm width, you can choose the radiator that best suits your space and heating requirements. Heat outputs range from 5,410 to 7,423 BTU at ΔT60, depending on your chosen height. Each radiator includes factory fitted top grilles, side panels and installation fixings. Radiator valves are required and sold separately.

Type 21 Double Panel & Single Convector Design
1200mm Wide Horizontal Central Heating Radiator
Choice Of 400mm, 500mm & 600mm Heights
Heat Outputs From 5,410 To 7,423 BTU At ΔT60
High Quality Gloss White RAL 9016 Finish
Factory Fitted Grilles, Side Panels & Installation Fixings Included

Product Description

K Rad Type 21 Central Heating Radiator 1200mm Wide White

The K Rad Type 21 Central Heating Radiator offers an effective and practical heating solution for bedrooms, living rooms, kitchens and other areas of the home. Manufactured from mild steel, its double panel and single convector construction delivers excellent heat output while maintaining a slimmer profile than a Type 22 radiator.

Finished in gloss white RAL 9016 enamel, this horizontal radiator features factory fitted top grilles and side panels for a clean, traditional panel radiator appearance. Designed for wall mounted installation, it is suitable for modern and traditional interiors.

Choose Your Radiator Height

All three options measure 1200mm wide, with a choice of heights to suit your available wall space and heating requirements.

400mm High: 5,410 BTU at ΔT60

500mm High: 6,463 BTU at ΔT60

600mm High: 7,423 BTU at ΔT60

Installation & What's Included

Each radiator is supplied with wall mounting brackets, bolts, vents and plugs for installation. Factory fitted top grilles and side panels are also included.

The radiators are suitable for operating pressures up to 10 bar and maximum operating temperatures of 120°C.

Radiator valves are required for installation and must be purchased separately.

Multi Buy Radiator Savings

Buying radiators for more than one room? BSD offers savings across selected central heating radiators:

Buy Any 2 Radiators & Save £10

Buy Any 3 Radiators & Save £15

Buy Any 4 Radiators & Save £20

Mix different radiator types and sizes to suit your home, subject to the qualifying offer.

Every K Rad Type 21 radiator comes with a 10 year guarantee.

Dimensions & Specifications

Specification Details
Brand K Rad
Product Type Central Heating Radiator
Radiator Type Type 21
Panel Configuration Double Panel
Convector Configuration Single Convector
Orientation Horizontal
Installation Wall Mounted
Material Mild Steel
Colour White
Finish Gloss White RAL 9016
Width 1200mm
Available Heights 400mm, 500mm, 600mm
Radiator Depth 70mm
Wall To Centre 65mm Or 80mm
Maximum Operating Pressure 10 Bar
Maximum Operating Temperature 120°C
Top Grille & Side Panels Included
Installation Fixings Included
Radiator Valves Not Included
Guarantee 10 Years

Size & Heat Output Specifications
Height SKU BTU ΔT60 Tapping Centres Weight
400mm P412K 5,410 245mm 21.88kg
500mm P512K 6,463 345mm 26.69kg
600mm P612K 7,423 545mm 32.91kg

Radiator Buying Guide (Content Section)

Choosing the Right Radiator Size

Selecting the correct radiator size helps ensure your room heats efficiently and comfortably. The heat output of a radiator is measured in BTU (British Thermal Units) or Watts, which indicate how much heat the radiator can produce.

Smaller rooms such as cloakrooms or en-suites typically require lower heat output, while larger bathrooms and living spaces may require a radiator with a higher BTU rating.

When choosing a radiator, consider:

• Room size – larger rooms require higher heat output

• Ceiling height – higher ceilings may require additional heating capacity

• Insulation levels – well insulated rooms retain heat more effectively

• Window size – rooms with large windows may lose heat more quickly

For best results, choose a radiator with sufficient BTU output to comfortably heat the space.

Radiator Installation

Most modern radiators connect directly to your home's central heating system using standard 1/2" inlet and outlet connections. Installation is similar to fitting a standard household radiator.

Radiators are typically supplied with wall mounting brackets and fixings, while radiator valves are purchased separately to allow you to choose the style and control type that best suits your installation.

For safety and correct operation, radiators should always be installed following manufacturer guidelines.

Radiator Valves

Radiator valves control the flow of hot water entering the radiator and help regulate the room temperature.

Common valve options include:

• Manual valves – simple temperature adjustment

• Thermostatic valves (TRV) – automatically regulate room temperature

• Angled or straight valves – depending on pipe position

Choosing the correct valve type ensures the radiator operates efficiently within your heating system.