550mm to 800mm Towel Radiators: Which Width Fits?

Quick answer: Choose between 550mm, 600mm, 650mm, 700mm, 750mm and 800mm widths by measuring the complete usable space. Allow for valves and access, then compare heights and heat output. A wider body is not automatically the better fit.

By M Tasan · Published 4 November 2026

Part of our wide towel radiator buying guide.

Start with what the wall can actually accommodate

Two bathrooms with the same floor area can need very different radiator shapes. A wall between a shower screen and a vanity unit may have a firm width limit. A broad wall below a cabinet may instead have limited height. Measure the space with doors and drawers open, and decide where towels will hang in daily use.

Write down the maximum body width you can consider, but keep a separate allowance for valve bodies and access. Product dimensions describe the item; they do not guarantee that there is space to install, operate or maintain it. Our wide towel radiator buying guide brings fit, output and accessories together.

Compare common widths and centres

The following centres apply to our towel radiator ranges. Confirm the selected product’s details before arranging work; other makes or styles may use different connection layouts.

How to choose between two neighbouring sizes

If both a 600mm and 650mm rail appear to fit, compare the installed arrangement before choosing. The extra 50mm changes body width and connection centres, but it does not tell you how much extra heat a specific model delivers. A different height or tube arrangement can change the comparison.

Make a simple full-size paper outline on the wall and mark the proposed valves separately. Check that you can reach them and that a hanging towel will not obstruct a drawer or crowd the shower entrance. This is a planning aid, not a substitute for the installation drawing.

Think about usable hanging space

Look at the gaps between tube groups as well as overall width. Consider whether you normally fold towels, share the rail or need to reach over it. A catalogue photograph can make rails of different sizes look similar, so use dimensions rather than the apparent scale of the picture.

Do not assume that a particular width will hold a fixed number of bath towels. Towel size, folding and the rail’s layout matter. Leaving some exposed surface also avoids treating a fully covered rail as if it were operating under its published test conditions.

Check the replacement work involved

Moving from 550mm to 600mm in these ranges changes the listed centres from 500mm to 550mm. That can mean pipework changes even though the new body is only slightly wider. Reusing the old valves may also alter the assembled fit. See our wide-radiator replacement checklist before assuming a like-for-like swap.

Width and warmth are separate decisions

A width shortlist should still be checked against room heat loss and model output. A low, wide radiator and a tall, narrower radiator can have different outputs even when their outlines occupy similar areas. On a heat pump, ask for output at the intended operating conditions; Energy Saving Trust explains why radiator sizing can change for heat pump installations.

Use the heat-output guide to compare figures, then browse wide towel radiators for the heights and finishes that fit. Choose the smallest shortlist that meets all your requirements, rather than treating every width as an equally suitable alternative.

Before you order

Check the width and height labels, connection centres, finish, output and valve arrangement for the exact option selected. If the available space is close to the product dimensions, send measurements and photographs to your installer before ordering. A small adjustment on a screen can become a significant alteration once pipes and wall fixings are involved.

Sources and scope

• Energy Saving Trust: air source heat pumps

External sources support the general heating or safety points identified above. Product dimensions, supplied fittings and range examples refer to Cheap Radiator’s listings; confirm the selected product before ordering. This is buying guidance, not an installation specification.