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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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11 Nov Towel Radiator Valves and Fittings: A UK Buying Guide

Towel Radiator Valves and Fittings: A UK Buying Guide

Choose towel radiator valves in this order: check how the pipes meet the rail, measure the connections, then decide whether you want manual or thermostatic control. Check the fittings and clearances before choosing chrome or matt black. Match the valve shape to your pipes A straight valve connects pipes and radiator tappings that line up. An angled..
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11 Nov Manual or Thermostatic Towel Radiator Valves?

Manual or Thermostatic Towel Radiator Valves?

Choose a manual valve if you want to adjust the towel radiator by hand. Choose a thermostatic radiator valve (TRV) if you want the valve to respond automatically to the air temperature around it and your installer confirms it suits the system. How the two types behave A manual valve holds the position you select. It does not sense when the bathroom..
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