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| Manufacturer Warranty | 5 Years (T&C’s Apply) |
|---|---|
| Orientation | Vertical Orientation |
| Colour | Black |
| Height | 1800 mm |
| Width | 425 mm |
| Heat Output Watts | 1464 |
| Heat Output BTU | 4995 |
| Radiator Pipe Centres (mm) (Plus Valves) | approx. 425 |
| Radiator Projection (mm) | 98-108 |
| Radiator Wall To Pipe Centres (mm) | 30-40 |
| Manufacturer | Kartell |
| Manufacturer Part No | BLK21800425 |
This is the size most people picture when they imagine a black column radiator making a statement: 1800mm of height, nine crisp sections and 4,995 BTU (1,464W) at Delta T60 - enough presence to replace artwork on a living room wall. The 425mm width strikes the balance between slot-in convenience and real heating muscle, which makes it the flexible pick of the black two-column verticals.
Kartell builds the Laser Klassic from laser-welded mild steel, tests every radiator to 10 bar and backs it with a five year guarantee. The matt black RAL 9004 finish is applied as a powder coat rather than paint, so it shrugs off knocks and never needs touching up. Columns sit just 68mm deep - add 30-40mm of bracket clearance and it still hugs the wall closer than most furniture.
Range photography is for illustration - the number of sections varies with the size ordered. This listing is the 1800 x 425mm 2 column model with 9 sections. Dimension drawing included in the gallery.
The right radiator is the one sized to the room, not the biggest that fits the wall.
| Output at Delta T60 (Kartell published) | 4,995 BTU / 1,464W |
|---|---|
| Output at Delta T50 (calculated, EN442 factor) | approx. 3,941 BTU / 1,155W |
| Typical room coverage | roughly 9-12 square metres in an average UK home |
Coverage is a guide only - insulation, glazing area and ceiling height change the sums. Use a BTU calculator with your room dimensions before ordering, and size up slightly for north-facing or draughty rooms.
| Range | Kartell K-Rad Laser Klassic |
|---|---|
| Type | 2 column radiator (vertical) |
| Height x Width | 1800 x 425mm |
| Column depth | 68mm (allow 98-108mm wall to front face) |
| Sections | 9 |
| Heat output (Delta T60) | 4,995 BTU / 1,464W |
| Heat output (Delta T50, calculated) | approx. 3,941 BTU / 1,155W |
| Finish | Matt black RAL 9004 powder coat over mild steel |
| Material | Laser-welded mild steel |
| Tapping centres | approx. 425mm - valves at bottom opposite ends |
| Weight (empty) | 27.05kg |
| Pressure tested | 10 bar |
| Guarantee | 5 years (register with Kartell UK) |
| In the box | Radiator, wall brackets, fixing kit, instructions |
| Valves | Not included - sold separately |
Fitting follows standard UK two-pipe practice and holds no surprises for an installer.
Valves are not included. You need a pair: one wheelhead or thermostatic (TRV) valve plus one lockshield. Angled valves suit pipework rising from the floor; straight valves suit wall-fed pipe runs.
See our radiator valves range - the Kartell TRV and lockshield twin packs pair perfectly.
Orders are picked from live UK stock. Radiators are palletised or double-boxed and checked before dispatch - please inspect on arrival and note any transit damage with the driver.
