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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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Blog - Dual fuel

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04 Nov Electric Towel Rail Running Costs: Calculate Your Own Estimate

Electric Towel Rail Running Costs: Calculate Your Own Estimate

Calculate electric towel rail running costs from wattage, operating time and your tariff. See worked examples and understand thermostatic cycling.
Read guide
04 Nov Choosing a Towel Radiator Element: Wattage, Length and Fit

Choosing a Towel Radiator Element: Wattage, Length and Fit

Choose a compatible towel radiator element. Check approved wattage, insertion length, connections, controls and kit contents before ordering.
Read guide
04 Nov Towel Rail Controls: Thermostats, Timers and Boost Explained

Towel Rail Controls: Thermostats, Timers and Boost Explained

Understand towel rail thermostats, timers and boost controls. Compare listed functions, temperature sensing, schedules and element package contents.
Read guide
04 Nov Can You Convert a Towel Radiator to Dual Fuel?

Can You Convert a Towel Radiator to Dual Fuel?

Considering a dual-fuel towel radiator conversion? Check radiator approval, element fit, fittings, clearances and installer requirements first.
Read guide
04 Nov Using a Dual-Fuel Towel Rail When the Central Heating Is Off

Using a Dual-Fuel Towel Rail When the Central Heating Is Off

Plan dual-fuel towel rail use when central heating is off. Check the permitted operating mode, controls, electricity use and installer instructions.
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04 Nov Electric Towel Rail Installation: Bathroom Planning Checks

Electric Towel Rail Installation: Bathroom Planning Checks

Plan an electric towel rail installation: product instructions, bathroom location, electrical provision, fitting clearances and installer handover.
Read guide
03 Nov Electric and Dual-Fuel Towel Radiators: A Practical Buying Guide

Electric and Dual-Fuel Towel Radiators: A Practical Buying Guide

Compare electric, dual-fuel and central-heating towel radiators. Check element compatibility, controls, running costs, fitting space and installation planning.
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Showing 1 to 7 of 7 (1 Pages)
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