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45 years of trusted expertise1800mm Radiators
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We stock a complete range of 1800mm wide radiators for domestic and commercial central heating systems. Our stock covers Type 11 single panels through to Type 22 double panels, providing varying heat outputs for large wall spaces. Every steel panel radiator in this category is supplied ready for installation, complete with mounting brackets, bleed valves, and a manufacturer guarantee.
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Sizing and Valve Clearances
When measuring your available wall space, you must calculate additional clearance for the connection hardware. The 1800mm dimension refers strictly to the physical steel panel.
For an 1800mm wide radiator, add approximately 90mm to the total width to accommodate a standard Thermostatic Radiator Valve (TRV) at one end and a lockshield valve at the other. This requires a minimum bare wall space of 1890mm. If routing new pipework, the pipe centres must be placed exactly 1890mm apart.
Choosing your panel configuration
When you are standing in a cold room trying to specify a replacement, the physical thickness of the new unit dictates your total heat output. Because you have already settled on an 1800mm width to fill a specific wall space, you must now choose between a single or double panel to hit your required British Thermal Unit (BTU) target.
- Type 11 (Single panel): This features one steel panel and one row of convector fins. A standard 600mm high by 1800mm wide Type 11 radiator produces a proxy output of around 4,500 to 5,500 BTUs. This slim unit sits tightly against the wall. It is the practical choice if you are heating a well-insulated modern extension where physical depth is restricted but you still want wide visual coverage beneath a large window.
- Type 22 (Double panel): This features two steel panels and two rows of fins. A standard 600mm high by 1800mm wide Type 22 radiator produces a proxy output of between 8,500 and 10,000 BTUs. This configuration protrudes much further into your room, but that extra depth delivers nearly double the heat. You will typically need this massive output to warm older, draughty lounges or large open-plan spaces.
Frequently Asked Questions (FAQs)
Are 1800mm wide radiators heavy?
Yes. An 1800mm double panel radiator contains a large volume of steel and holds a significant amount of water when filled. Installers must ensure the wall structure can support the weight. If installing on a stud wall, you must secure the mounting brackets directly into the timber studs or use specified heavy-duty plasterboard anchors.
Do 1800mm radiators come with valves?
No. 1800mm radiators are sold as standalone units. You must specify and purchase the correct radiator valves separately based on whether your pipework emerges from the wall or the floor.
Versatile Applications for 1800mm Radiators: Domestic & Commercial
While 1800mm radiators are a favourite for modern domestic renovations, particularly in kitchens and hallways where wall space is limited, they're equally suited to commercial properties such as offices and retail units. Design-wise, the CP choice of radiators promotes a sleek, modern aesthetic that turns a functional necessity into a stylish architectural feature, delivering efficient, consistent warmth at grander scales.
Buy 1800mm Radiators at City Plumbing
City Plumbing is the one-stop shop and favoured choice of local plumbers' merchants for both homeowners and installers working in the trade.
Trusted and respected by our customers, our distinguished Trustpilot rating, alongside a wealth of knowledge from four-plus decades of experience, and superior plumbing and heating products and advice, means we’re here to help you get the job done.
With more than 350 branches nationwide, our prices are competitive to help ensure you finish all your projects on budget.
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