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| Manufacturer | Kartell UK Ltd |
|---|---|
| Manufacturer Warranty | 5 Years (T&C’s Apply) |
| Orientation | Vertical Orientation |
| Panel Type | Single Panel Radiator |
| Height | 1800 mm |
| Width | 540 mm |
| Heat Output BTU | 4309 |
| Radiator Pipe Centres (mm) (Plus Valves) | 540 |
| Radiator Wall To Pipe Centres (mm) | 40 |
| Radiator Colour | Textured Grey |
| Model | Aspen Textured Grey Vertical Single |
| Brand | K-Rad Designer Range |
| Fuel Type | Central Heating |
| Width (mm) | 540 |
| Depth (mm) | 55 |
| Height (mm) | 1800 |
| Manufacturer Part No | ASP18-55VSA |
SKU: ASP18-55VSA | EAN: 5055681428884 | 5 Year Guarantee
You must inspect your order at the point of delivery before signing. Any damage, shortages, or incorrect items must be reported to us within 48 hours of receipt. We are unable to process any claims reported outside of this timeframe. Please retain all original packaging until you are completely satisfied with your order.
The K-Rad Aspen range is one of the most popular designer vertical radiator collections in the UK - and for good reason. Constructed from mild steel oval tubes and pressure tested up to 7.8 bar, it combines contemporary design with reliable performance. The matt textured grey finish is far more durable than standard powder coat, resisting chips and scratches in high traffic areas such as hallways and bathrooms. At just 63mm deep it sits closer to the wall than many competing designer radiators.
This radiator is backed by a 5 year guarantee from Kartell UK, giving you complete peace of mind with your purchase. The guarantee covers manufacturing defects and is registered directly with Kartell UK.
Free delivery on orders over £500. We aim to deliver within 3-5 working days, though we always try to get your order to you sooner.
| Height | 1800mm |
| Width | 540mm |
| Depth | 63mm |
| Orientation | Vertical |
| Colour / finish | Textured Grey - Matt |
| Material | Mild Steel |
| Style | Oval tube - Modern |
| Heat output (BTU at Delta T60) | 4,309 BTU |
| Heat output (Watts at Delta T60) | 1,263W |
| Fuel / system type | Central heating (gas, oil, or electric) |
| Pipe centres | 540mm |
| Mounting | Wall mounted |
| Empty weight | 21.12kg |
| Max working pressure | 7.8 bar |
| Fixings supplied | Yes - all fixings included |
| Guarantee | 5 years from Kartell UK |
| SKU | ASP18-55VSA |
| EAN / GTIN-13 | 5055681428884 |
At 4,309 BTU (1,263W) this radiator comfortably heats rooms of approximately 54-66 sq ft - ideal for a master bedroom, large bathroom, or small open-plan space. For larger or poorly insulated rooms, consider a wider or double panel model.
Not sure? Use our free BTU calculator to get an accurate recommendation.
The K-Rad Aspen Single Textured Grey Vertical Radiator is available in a range of sizes. The currently selected size is highlighted below.
| Size (H x W) | BTU Output | Pipe Centres | SKU |
|---|---|---|---|
| 1600 x 420mm | 3,194 BTU | 420mm | ASP16-43VSA |
| 1800 x 300mm | 1,997 BTU | 300mm | ASP18-30VSA |
| 1800 x 420mm | 2,798 BTU | 420mm | ASP18-43VSA |
| 1800 x 540mm - Currently viewing | 4,309 BTU | 540mm | ASP18-55VSA |
| 1800 x 600mm | 4,787 BTU | 600mm | ASP18-60VSA |
Also available in white - see our full vertical radiator range.
Pipe centres of 540mm are compatible with the majority of standard UK plumbing configurations. All necessary wall fixings are supplied with this radiator as standard.
This radiator is compatible with both angled and straight radiator valves. Maximum working pressure is 7.8 bar. Suitable for sealed and open vented central heating systems running on gas, oil, or compatible with electric heating elements where specified.
Professional installation is strongly recommended. Connection to a gas central heating system must be carried out by a Gas Safe registered engineer.
Need the installation manual? Contact our team at info@plumbxtra.co.uk and we will send it straight over.
With 4,309 BTU (1,263W) at Delta T60, this radiator suits rooms of approximately 54-66 square feet based on standard UK guidelines of 65-80 BTU/sq ft. Always consult a qualified heating engineer for precise sizing.
Pipe centres are 540mm. Compatible with the vast majority of UK central heating configurations. Angled or extended valve sets can bridge different pipe positions if needed.
Yes - this radiator comes with a 5 year manufacturer guarantee from Kartell UK, covering manufacturing defects. One of the best guarantees available on a designer radiator in this price range.
Yes - compatible with all wet central heating systems including combi boilers, system boilers, and regular boilers on gas or oil. Can also work with air source heat pumps, though output at lower flow temperatures will differ from the quoted Delta T60 figure.
Yes - this radiator is suitable for bathroom installation provided it is connected to your central heating system by a qualified installer and installed in compliance with Part P building regulations.
Valves are not included with this radiator and will need to be purchased separately. We stock a full range of compatible radiator valves - contact our team for recommendations.
Yes - this listing is for the textured grey finish. The K-Rad Aspen is also available in white across a range of sizes. See our full vertical radiator range for all available options.
The Kartell K-Rad Aspen projects 63mm from the wall - one of the slimmest profiles available for a designer vertical radiator of this output, making it ideal for rooms where space near the wall is limited.
Everything you need to know before buying a designer vertical radiator.
BTU (British Thermal Unit) measures how much heat a radiator produces. The higher the BTU, the larger the room it can heat. As a simple guide:
Small room (bathroom/WC): 1,500-2,500 BTU
Medium room (bedroom): 2,500-5,000 BTU
Large room (living room): 5,000-10,000 BTU
This radiator produces 4,309 BTU making it ideal for master bedrooms, large bathrooms, and small open-plan spaces. Always factor in ceiling height, insulation, and window size.
The choice between vertical and horizontal comes down to your available wall space:
Vertical radiators are tall and narrow - perfect for hallways, between windows, beside doors, or any space where width is limited.
Horizontal radiators sit under windows and spread heat evenly across the room. Better for wide rooms with low window sills.
This 1800mm tall vertical radiator at 540mm wide delivers strong heat output whilst keeping a slim 63mm wall projection.
Panel count affects both heat output and depth:
Single panel - one set of oval tubes, slimmer profile, lighter, and more contemporary. Ideal where a lower heat output is sufficient.
Double panel - two sets of tubes producing significantly more heat but with a greater wall projection.
This is a single panel radiator at 63mm deep - ideal for rooms where a slim profile is important.
Not all designer radiators are equal. Here's what matters:
BTU output: Always check it matches your room requirements.
Pipe centres: Must match your existing pipework - this radiator has 540mm pipe centres.
Wall projection: This radiator projects just 63mm.
Guarantee: The K-Rad Aspen comes with a 5 year manufacturer guarantee.
Valves: Not included - sold separately.
The Kartell K-Rad Aspen is one of the best-selling designer vertical radiators in the UK - trusted by homeowners, plumbers, and heating engineers alike. Also searched for as: K-Rad Aspen textured grey, Kartell Aspen radiator, KRAD Aspen 1800x540, Aspen vertical radiator textured grey.
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