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Plan your space

Quick BTU calculator

Enter your room measurements for an estimated heating requirement. Compare radiators without leaving this page.

Starting assumptions: two adjacent outside walls, 1.5m² low-E glazing, insulated cavity walls, ground floor and insulated loft. Check these against your room.

Check or change room assumptions

U-values describe heat passing through a surface; use known building values where available. −3°C outdoors, 10°C below and the default U-values are preliminary assumptions, not a location survey. Unheated lofts use the outdoor temperature; heated floors/ceilings use U 1.36/1.62 and the adjacent-room temperature.

Preliminary rectangular-room estimate, not an installer’s heat-loss survey. It excludes detailed thermal bridging, ground/loft modelling and ventilation-system design. Confirm the room heat loss and radiator output at your heating-system temperatures before ordering.

Need help choosing? Contact us →

Turkish Zone

200mm Wide 800mm High Black Towel Radiator Flat 200mm Wide 800mm High Black Towel Radiator Flat
This black towel radiator measures 200 mm wide × 800 mm high.Size & constructionWidth200 mmHeight800 mmFinishBlackMaterialSteelDesignFlat / straightTowel slots2Bar configuration3 + 4 + 8 = 15 barsHeat output & fitting dimensionsListed heat output744 BTU/h · 218 WPipe centres150 mmWall to pip..
£64.99
Ex Tax:£54.16
Question
250mm Wide 800mm High Black Towel Radiator Flat Narrow 250mm Wide 800mm High Black Towel Radiator Flat Narrow
-9 %
This black towel radiator measures 250 mm wide × 800 mm high.Size & constructionWidth250 mmHeight800 mmFinishBlackMaterialMild steelDesignFlat / straightTowel slots2Bar configuration3 + 4 + 8 = 15 barsHeat output & fitting dimensionsListed heat output863 BTU/h · 254 WPipe centres200 mmWall t..
£67.99 £74.99
Ex Tax:£56.66
Question
300mm Wide 600mm High Flat Chrome Towel Radiator 300mm Wide 600mm High Flat Chrome Towel Radiator
-25 %
This chrome towel radiator measures 300 mm wide × 600 mm high.Size & constructionWidth300 mmHeight600 mmFinishChromeMaterialSteelDesignFlat / straightTube diameter22 mmTowel slots2Bar configuration3 + 4 + 4 = 11 barsHeat output & fitting dimensionsListed heat output626 BTU/h · 185 WPipe cent..
£53.99 £71.99
Ex Tax:£44.99
Question
300mm Wide 800mm High Black Towel Radiator Flat 300mm Wide 800mm High Black Towel Radiator Flat
This black towel radiator measures 300 mm wide × 800 mm high.Size & constructionWidth300 mmHeight800 mmFinishBlackMaterialSteelDesignFlat / straightTowel slots2Bar configuration3 + 4 + 8 = 15 barsHeat output & fitting dimensionsListed heat output1,017 BTU/h · 297 WPipe centres250 mmWall to p..
£51.99
Ex Tax:£43.33
Question
350mm Wide 800mm High Black Towel Radiator Flat Narrow 350mm Wide 800mm High Black Towel Radiator Flat Narrow
-9 %
This matt black towel radiator measures 350 mm wide × 800 mm high.Size & constructionWidth350 mmHeight800 mmFinishMatt blackMaterialMild steelDesignFlat / straightTowel slots2Bar configuration3 + 4 + 8 = 15 barsHeat output & fitting dimensionsListed heat output1,099 BTU/h · 323 WPipe centres..
£67.99 £74.99
Ex Tax:£56.66
Question
200mm Wide 1000mm High Black Towel Radiator Flat 200mm Wide 1000mm High Black Towel Radiator Flat
This black towel radiator measures 200 mm wide × 1,000 mm high.Size & constructionWidth200 mmHeight1,000 mmFinishBlackMaterialSteelDesignFlat / straightTowel slots3Bar configuration4 + 4 + 4 + 7 = 19 barsHeat output & fitting dimensionsListed heat output925 BTU/hPipe centres150 mmWall to pip..
£79.99
Ex Tax:£66.66
Question
250mm Wide 1000mm High Black Towel Radiator Flat Narrow 250mm Wide 1000mm High Black Towel Radiator Flat Narrow
-17 %
This black towel radiator measures 250 mm wide × 1,000 mm high.Size & constructionWidth250 mmHeight1,000 mmFinishBlackMaterialMild steelDesignFlat / straightTowel slots3Bar configuration4 + 4 + 4 + 7 = 19 barsHeat output & fitting dimensionsListed heat output1,085 BTU/h · 319 WPipe centres20..
£74.99 £89.99
Ex Tax:£62.49
Question
300mm Wide 800mm High Flat Chrome Towel Radiator 300mm Wide 800mm High Flat Chrome Towel Radiator
-17 %
This chrome towel radiator measures 300 mm wide × 800 mm high.Size & constructionWidth300 mmHeight800 mmFinishChromeMaterialSteelDesignFlat / straightTowel slots2Bar configuration3 + 4 + 8 = 15 barsHeat output & fitting dimensionsListed heat output847 BTU/h · 249 WPipe centres250 mmWall to p..
£61.99 £74.99
Ex Tax:£51.66
Question
350mm Wide 1000mm High Black Towel Radiator Flat Narrow Slim 350mm Wide 1000mm High Black Towel Radiator Flat Narrow Slim
-14 %
This black towel radiator measures 350 mm wide × 1,000 mm high.Size & constructionWidth350 mmHeight1,000 mmFinishBlackMaterialMild steelDesignFlat / straightTowel slots3Bar configuration4 + 4 + 4 + 7 = 19 barsHeat output & fitting dimensionsListed heat output1,384 BTU/h · 406 WPipe centres30..
£76.99 £89.99
Ex Tax:£64.16
Question
400mm Wide 1000mm High Black Towel Radiator Flat 400mm Wide 1000mm High Black Towel Radiator Flat
This matt black towel radiator measures 400 mm wide × 1,000 mm high.Size & constructionWidth400 mmHeight1,000 mmFinishMatt blackMaterialSteelDesignFlat / straightTowel slots3Bar configuration4 + 4 + 4 + 7 = 19 barsHeat output & fitting dimensionsListed heat output1,533 BTU/h · 450 WPipe cent..
£56.99
Ex Tax:£47.49
Question
200mm Wide 1200mm High Black Towel Radiator Flat 200mm Wide 1200mm High Black Towel Radiator Flat
This black towel radiator measures 200 mm wide × 1,200 mm high.Size & constructionWidth200 mmHeight1,200 mmFinishBlackMaterialSteelDesignFlat / straightTowel slots2Bar configuration4 + 4 + 5 + 10 = 23 barsHeat output & fitting dimensionsListed heat output1,126 BTU/h · 330 WPipe centres150 mm..
£81.99
Ex Tax:£68.33
Question
200mm Wide 1200mm High Flat Chrome Towel Radiator 200mm Wide 1200mm High Flat Chrome Towel Radiator
This chrome towel radiator measures 200 mm wide × 1,200 mm high.Size & constructionWidth200 mmHeight1,200 mmFinishChromeMaterialSteelDesignFlat / straightBar configuration4 + 4 + 5 + 10 = 23 barsHeat output & fitting dimensionsListed heat output973 BTU/h · 285 WPipe centres150 mmWall to pipe..
£64.99
Ex Tax:£54.16
Question
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