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Free mainland delivery £200+ · Highlands, islands & NI £9.99
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.

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Price Promise Guarantee


Price match terms and conditions

We will match the prices of in-stock products prior to purchase or up to 7 days thereafter.


We do not offer price matching for delivery charges, installation fees, product protection plans, or other associated services.


The item offered at a lower price must be available under identical terms (including the same dimensions, colour, specifications, and model) and we must have the ability to verify the price, stock availability, and, where pertinent, your eligibility to purchase from the competitor.


We will conduct price matching against any other UK website, including discounts provided through offer codes. This policy excludes any exclusive pricing or codes (e.g. staff, student, NHS staff blue light), trade prices, prices accessible only through paid memberships or subscriptions, loyalty schemes, reward programs, third-party marketplace seller prices, or evident pricing errors.


Both our organisation and the competitor must maintain the product in stock and ready for delivery.


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In scenarios where a product is not accessible online for us to confirm the price and availability, you will be required to provide the competitor's contact information, a photo displaying the model/model number, confirmation of stock availability, the date and time, and the listed price.


We reserve the right to decline a price match in instances where we suspect fraudulent activities or unauthorised reseller behaviour.

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