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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.

Need help choosing? Contact us →

Blog - Small bathrooms

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01 Nov Towel Radiator Pipe Centres: How to Measure Before Buying

Towel Radiator Pipe Centres: How to Measure Before Buying

Measure towel radiator pipe centres, distinguish body width from connection spacing, and check valve geometry before replacing an existing rail.
01 Nov Straight or Angled Towel Radiator Valves: What Do I Need?

Straight or Angled Towel Radiator Valves: What Do I Need?

Choose straight or angled towel radiator valves by checking pipe direction, radiator connections, pipe diameter and the controls your system needs.
03 Jun Bathroom Towel Radiator BTU: Watts, Heat Loss and ΔT

Bathroom Towel Radiator BTU: Watts, Heat Loss and ΔT

Understand BTU/h, watts and ΔT before choosing a bathroom towel radiator. Compare heat loss with output at your system’s operating temperature.
26 May Chrome or Black Towel Radiator for a Small Bathroom?

Chrome or Black Towel Radiator for a Small Bathroom?

Compare chrome and matt black towel radiators for a small bathroom, including visual balance, care, fittings and model-specific heat output.
26 May How to Choose a Towel Radiator for a Small Bathroom

How to Choose a Towel Radiator for a Small Bathroom

Choose a towel radiator for a small bathroom: measure the space, check BTU output and pipe centres, then compare finishes and valve options.
22 May Towel Radiator Sizes: Measuring a Small Bathroom

Towel Radiator Sizes: Measuring a Small Bathroom

Measure towel radiator width, height and projection, check doors and valves, and compare narrow or wider layouts for a small bathroom.
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