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Type 21 Double Panel Radiators

Don't be left out in the cold this winter - install Type 21 radiators in your home to stay toasty and warm. Type 21 radiators are one of the most common types of radiators in the UK so you're most likely already familiar with them. They consist of two radiator panels with one row of fins in between. They usually come with a grill and side panels that clip onto the radiator for a seamless finish and are some of the most affordable options you can buy. They're the perfect radiators for when you need a highly efficient and effective heater that won't take up too much space.

Why choose Type 21 radiators?

Thanks to their steel construction, Type 21 radiators are some of the most durable and reliable on the market. Steel has been used for radiators for decades due to its ability to conduct heat really well and its hardwearing, durable quality - offering you a reliable and affordable heating solution for your home. Type 21 radiators are available in many different sizes and widths so can be fitted in any space but are ideal for using beneath windows to utilise dead space. The row of fins inside these radiators are the reason they're so effective - they help to increase the amount of heat the radiator throws out into the room. Pair with a thermostatic radiator valve for even more efficient heating for your home and protection from frost. If you're looking for more options, check out our full range of double panel radiators and if you're looking for a larger heat output, check out Type 22 radiators instead!

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Items 1-30 of 90

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  1. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W400mm
    Product Code: 22680
    BTUS
    • Δ30: 725 / Δ50: 1408 / Δ70: 2181
    WATTS
    • Δ30: 213 / Δ50: 413 / Δ70: 640
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £34
  2. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H300mm x W500mm
    Product Code: 23531
    BTUS
    • Δ30: 655 / Δ50: 1271 / Δ70: 1969
    WATTS
    • Δ30: 192 / Δ50: 373 / Δ70: 578
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £36
  3. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W400mm
    Product Code: 22668
    BTUS
    • Δ30: 866 / Δ50: 1682 / Δ70: 2605
    WATTS
    • Δ30: 254 / Δ50: 493 / Δ70: 764
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £41
  4. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H450mm x W400mm
    Product Code: 23738
    BTUS
    • Δ30: 742 / Δ50: 1440 / Δ70: 2231
    WATTS
    • Δ30: 217 / Δ50: 422 / Δ70: 654
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £41
  5. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W500mm
    Product Code: 22679
    BTUS
    • Δ30: 906 / Δ50: 1759 / Δ70: 2725
    WATTS
    • Δ30: 266 / Δ50: 516 / Δ70: 799
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £43
  6. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H600mm x W400mm
    Product Code: 22658
    BTUS
    • Δ30: 995 / Δ50: 1932 / Δ70: 2993
    WATTS
    • Δ30: 291 / Δ50: 566 / Δ70: 877
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £47
  7. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W500mm
    Product Code: 22667
    BTUS
    • Δ30: 1083 / Δ50: 2102 / Δ70: 3256
    WATTS
    • Δ30: 317 / Δ50: 616 / Δ70: 954
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £51
  8. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H450mm x W500mm
    Product Code: 23737
    BTUS
    • Δ30: 927 / Δ50: 1800 / Δ70: 2788
    WATTS
    • Δ30: 272 / Δ50: 528 / Δ70: 818
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £51
  9. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W600mm
    Product Code: 22678
    BTUS
    • Δ30: 1087 / Δ50: 2111 / Δ70: 3270
    WATTS
    • Δ30: 319 / Δ50: 619 / Δ70: 959
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £52
  10. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H600mm x W400mm
    Product Code: 23693
    BTUS
    • Δ30: 946 / Δ50: 1836 / Δ70: 2844
    WATTS
    • Δ30: 277 / Δ50: 538 / Δ70: 833
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £53
  11. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H750mm x W400mm
    Product Code: 22644
    BTUS
    • Δ30: 1141 / Δ50: 2216 / Δ70: 3433
    WATTS
    • Δ30: 335 / Δ50: 650 / Δ70: 1007
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £54
  12. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H600mm x W500mm
    Product Code: 22657
    BTUS
    • Δ30: 1243 / Δ50: 2414 / Δ70: 3739
    WATTS
    • Δ30: 365 / Δ50: 708 / Δ70: 1097
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £59
  13. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H700mm x W400mm
    Product Code: 23657
    BTUS
    • Δ30: 1075 / Δ50: 2088 / Δ70: 3234
    WATTS
    • Δ30: 315 / Δ50: 612 / Δ70: 948
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £61
  14. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H450mm x W600mm
    Product Code: 23736
    BTUS
    • Δ30: 1112 / Δ50: 2160 / Δ70: 3346
    WATTS
    • Δ30: 326 / Δ50: 633 / Δ70: 981
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £61
  15. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W600mm
    Product Code: 22666
    BTUS
    • Δ30: 1299 / Δ50: 2523 / Δ70: 3908
    WATTS
    • Δ30: 381 / Δ50: 739 / Δ70: 1145
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £62
  16. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H600mm x W500mm
    Product Code: 23692
    BTUS
    • Δ30: 1182 / Δ50: 2295 / Δ70: 3555
    WATTS
    • Δ30: 347 / Δ50: 673 / Δ70: 1042
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £66
  17. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H750mm x W500mm
    Product Code: 22643
    BTUS
    • Δ30: 1427 / Δ50: 2771 / Δ70: 4292
    WATTS
    • Δ30: 418 / Δ50: 812 / Δ70: 1258
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £67
  18. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W800mm
    Product Code: 22676
    BTUS
    • Δ30: 1450 / Δ50: 2815 / Δ70: 4360
    WATTS
    • Δ30: 425 / Δ50: 825 / Δ70: 1278
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £69
  19. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H600mm x W600mm
    Product Code: 22656
    BTUS
    • Δ30: 1492 / Δ50: 2897 / Δ70: 4487
    WATTS
    • Δ30: 437 / Δ50: 849 / Δ70: 1315
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £70
  20. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W700mm
    Product Code: 22665
    BTUS
    • Δ30: 1516 / Δ50: 2943 / Δ70: 4559
    WATTS
    • Δ30: 444 / Δ50: 863 / Δ70: 1337
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £71
  21. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H300mm x W1000mm
    Product Code: 23711
    BTUS
    • Δ30: 1309 / Δ50: 2542 / Δ70: 3938
    WATTS
    • Δ30: 384 / Δ50: 745 / Δ70: 1154
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £71
  22. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H450mm x W700mm
    Product Code: 23735
    BTUS
    • Δ30: 1298 / Δ50: 2520 / Δ70: 3903
    WATTS
    • Δ30: 381 / Δ50: 739 / Δ70: 1145
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £72
  23. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H700mm x W500mm
    Product Code: 23656
    BTUS
    • Δ30: 1344 / Δ50: 2610 / Δ70: 4043
    WATTS
    • Δ30: 394 / Δ50: 765 / Δ70: 1185
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £76
  24. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W900mm
    Product Code: 22675
    BTUS
    • Δ30: 1631 / Δ50: 3167 / Δ70: 4906
    WATTS
    • Δ30: 478 / Δ50: 928 / Δ70: 1437
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £77
  25. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H600mm x W600mm
    Product Code: 23691
    BTUS
    • Δ30: 1418 / Δ50: 2753 / Δ70: 4264
    WATTS
    • Δ30: 416 / Δ50: 807 / Δ70: 1250
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £79
  26. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H600mm x W700mm
    Product Code: 22655
    BTUS
    • Δ30: 1741 / Δ50: 3380 / Δ70: 5236
    WATTS
    • Δ30: 510 / Δ50: 991 / Δ70: 1535
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £81
  27. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W800mm
    Product Code: 22664
    BTUS
    • Δ30: 1732 / Δ50: 3363 / Δ70: 5209
    WATTS
    • Δ30: 508 / Δ50: 986 / Δ70: 1527
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £81
  28. Stelrad
    P+ - Type 21 Double Panel Central Heating Radiator - H450mm x W800mm
    Product Code: 23734
    BTUS
    • Δ30: 1483 / Δ50: 2880 / Δ70: 4461
    WATTS
    • Δ30: 435 / Δ50: 844 / Δ70: 1307
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £82
  29. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H400mm x W1000mm
    Product Code: 22674
    BTUS
    • Δ30: 1812 / Δ50: 3519 / Δ70: 5451
    WATTS
    • Δ30: 531 / Δ50: 1031 / Δ70: 1597
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £86
  30. Kartell UK
    K-Rad - Type 21 Double Panel Central Heating Radiator - H500mm x W900mm
    Product Code: 22663
    BTUS
    • Δ30: 1949 / Δ50: 3784 / Δ70: 5861
    WATTS
    • Δ30: 571 / Δ50: 1109 / Δ70: 1718
    • Guarantee: 10 Years
    • Side Panels, Top Grille, Brackets, Masonry Fixings, Bleed Valve & Blanking Plug Included
    In stock Delivery: 5-7 working days
    £91

Items 1-30 of 90

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