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| Colour | White |
|---|---|
| Sizes | 1800x420 |
| Height | 1800 mm |
| Width | 420 mm |
| BTU | 3777 |
SKU: PA-1842S | EAN: 8800161377155 | Central Heating Compatible
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Vertical radiators are the smart solution when horizontal wall space is limited. At 1800mm tall this radiator makes maximum use of vertical wall space whilst keeping a slim 420mm footprint. The tall format promotes better convection — warm air rises efficiently from the full height of the panel — making it well suited to lower flow temperatures and future heat pump systems.
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 | 420mm |
| Thickness | 56mm |
| Orientation | Vertical |
| Colour / finish | White powder coat |
| Heat output (BTU at ΔT60) | 3,777 BTU |
| Heat output (Watts at ΔT60) | 1,108W |
| Fuel / system type | Central heating (gas, oil, or electric) |
| Pipe centres | 420mm |
| Wall to pipe centres | 50mm |
| Wall distance (projection) | 92mm |
| Empty weight | 16.8kg |
| Water volume | 11.08 litres |
| Max working pressure | 6 bar |
| Max working temperature | 95°C |
| SKU | PA-1842S |
| EAN / GTIN-13 | 8800161377155 |
At 3,777 BTU (1,108W) this radiator comfortably heats rooms of approximately 47–58 sq ft — ideal for a large bathroom, single bedroom, or small living room. For larger or poorly insulated rooms, consider a wider model from the range below.
Not sure? Use our free BTU calculator to get an accurate recommendation.
Available in 6 sizes to suit every room. The currently selected size is highlighted below.
| Size (H x W) | BTU Output | Watts Output | Pipe Centres | SKU |
|---|---|---|---|---|
| 1600 x 420mm | 3,407 BTU | 999W | 420mm | PA-1642S |
| 1600 x 540mm | 4,382 BTU | 1,285W | 540mm | PA-1654S |
| 1800 x 300mm | 2,697 BTU | 791W | 300mm | PA-1830S |
| 1800 x 420mm ✓ Currently viewing | 3,777 BTU | 1,108W | 420mm | PA-1842S |
| 1800 x 540mm | 4,856 BTU | 1,424W | 540mm | PA-1854S |
| 1800 x 600mm | 5,396 BTU | 1,582W | 600mm | PA-1860S |
Also available in anthracite finish — see our full vertical radiator range.
Pipe centres of 420mm and a wall-to-pipe centres measurement of 50mm are compatible with the majority of standard UK plumbing configurations. All necessary wall fixings are included — 4 brackets, 4 fixing screws, 4 spacers, 1 air vent and 1 end plug.
This radiator uses standard 1/2 inch BSP connections and is compatible with both angled and straight radiator valves. Flow and return connections are bottom opposite end (BOE). Maximum working pressure is 6 bar and maximum working temperature is 95°C. Suitable for sealed and open vented systems.
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 3,777 BTU (1,108W) at ΔT60, this radiator suits rooms of approximately 47–58 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 420mm, with a wall to pipe centres measurement of 50mm. Compatible with the vast majority of UK central heating configurations. Angled or extended valve sets can bridge different pipe positions.
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 ΔT60 figure.
A single panel radiator has one panel and one set of convector fins, making it slimmer and lighter at just 56mm deep. A double panel has two panels producing significantly more heat output from the same wall space but with a greater projection. Single panel radiators are ideal where space is limited or where a lower heat output is sufficient.
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. It must not be used as a towel rail unless specifically designed for that purpose.
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.
This listing is for the white powder-coat finish. An anthracite version is also available in our store — search for Premium Aspen 1800x420mm Anthracite Vertical Radiator.
This radiator projects 92mm from the wall with a wall to pipe centres measurement of 50mm, suitable for most standard UK installations.
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 3,777 BTU making it ideal for large bathrooms, single bedrooms, and small living rooms. 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 420mm wide maximises heat output from a slim wall footprint.
Panel count affects both heat output and depth:
Single panel — one flat panel, slimmer (56mm deep), lighter, and more contemporary. Ideal where a lower heat output is sufficient.
Double panel — two panels producing significantly more heat but projects further from the wall (105mm).
This is a single panel radiator at 56mm deep — the slimmest option in the range.
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 420mm pipe centres.
Wall projection: This radiator projects just 92mm.
Finish quality: Powder-coat finishes resist chips and moisture.
Valves: Not included with this radiator — sold separately.
Premium Aspen radiators are manufactured to the same exacting standards as leading designer radiator brands — giving you premium quality at a competitive price point. Also searched for as: Krad Aspen radiator, Krad Aspen vertical radiator, Krad Aspen white radiator.
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