K Rad Type 21 white 1000mm horizontal radiator in a modern children's bedroom with sage green walls, woodland wallpaper and oak flooring.

K Rad Type 21 Central Heating Radiator 1000mm Wide White

400mmm High

£119.95

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K Rad Type 21 Central Heating Radiator 1000mm Wide White

£119.95

Height Required 400mmm High 500mm High 600mm High 750mm High

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The K Rad Type 21 Central Heating Radiator offers reliable heating performance with a clean, contemporary design that suits both modern and traditional homes. Its double panel and single convector construction provides effective warmth while maintaining a slimmer profile than a Type 22 radiator. Manufactured from mild steel with a durable gloss white RAL 9016 finish, it is a practical choice for bedrooms, living rooms, kitchens and other areas of the home.

Measuring 1000mm wide, this radiator is available in four heights of 400mm, 500mm, 600mm and 750mm, with heat outputs ranging from 4,508 to 7,099 BTU at ΔT60. Factory fitted top grilles and side panels provide a neat appearance, while wall mounting brackets and installation fixings are included. Suitable radiator valves are required and sold separately.

Type 21 Double Panel & Single Convector Design
1000mm Wide With Four Height Options
Heat Outputs From 4,508 To 7,099 BTU
Durable Gloss White RAL 9016 Finish
Factory Fitted Top Grille & Side Panels
Wall Mounting Brackets & Installation Fixings Included

Product Description

K Rad Type 21 Central Heating Radiator 1000mm Wide White

The K Rad Type 21 Central Heating Radiator combines effective heating performance with a clean, contemporary design suitable for modern and traditional homes. Manufactured from mild steel, its double panel and single convector construction provides reliable warmth while maintaining a slimmer profile than a Type 22 radiator.

Finished in durable gloss white RAL 9016 enamel, this horizontal radiator features factory fitted top grilles and side panels for a neat appearance. Its 1000mm width makes it suitable for bedrooms, living rooms, kitchens and other spaces requiring dependable central heating.

Available Sizes & Heat Outputs

Choose from four heights to suit your room and heating requirements:

400mm High x 1000mm Wide – 4,508 BTU

500mm High x 1000mm Wide – 5,386 BTU

600mm High x 1000mm Wide – 6,186 BTU

750mm High x 1000mm Wide – 7,099 BTU

All heat outputs are measured at ΔT60 in accordance with EN442.

Installation & What's Included

Each radiator is supplied with wall mounting brackets, fixing bolts, vents and plugs, together with factory fitted top grilles and side panels.

The radiator is suitable for central heating systems operating at pressures up to 10 bar and maximum temperatures of 120°C.

Suitable radiator valves are required for installation and are sold separately.

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Mix qualifying radiator types, widths and heights to suit different rooms throughout your home. Savings are applied automatically at checkout.

Each radiator comes with a 10 year guarantee.

Dimensions & Specifications

Specification 400mm 500mm 600mm 750mm
Manufacturer SKU P410K P510K P610K P710K
Barcode 5060168221742 5060168221889 5060168222022 5060168222183
Height 400mm 500mm 600mm 750mm
Width 1000mm 1000mm 1000mm 1000mm
Heat Output ΔT60 4,508 BTU 5,386 BTU 6,186 BTU 7,099 BTU
Product Weight 18.23kg 22.24kg 27.43kg 34.56kg
Tapping Centres 1000mm 1000mm 1000mm 1000mm

Additional Specifications
Specification Details
Brand K Rad
Radiator Type Type 21
Configuration Double Panel, Single Convector
Orientation Horizontal
Material Mild Steel
Colour White
Finish Gloss White RAL 9016
Mounting Wall Mounted
Maximum Operating Pressure 10 Bar
Maximum Operating Temperature 120°C
Factory Fitted Top Grille Included
Factory Fitted Side Panels Included
Wall Mounting Brackets Included
Fixing Bolts Included
Vents & Plugs Included
Radiator Valves Not Included
Heat Output Standard EN442
Guarantee 10 Years

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.