How to Choose a Heated Towel Rail — Buying Guide

How your towel rail is powered determines when and how you can use it:

Central heating (hydronic) — Connects to your central heating system. Only heats up when your boiler is running. The most common and cheapest to run, but you won't have warm towels in summer unless the heating is on.

Electric — Runs independently of your heating system using a built-in electric element. Can be used year-round. Ideal for bathrooms without central heating access or where you want warm towels without heating the whole house. Needs a fused spur connection installed by an electrician.

Dual fuel — The best of both worlds. Connects to central heating but also has an electric element so it works when the boiler is off. Slightly more expensive but extremely practical. Our most recommended option.

BTU (British Thermal Units) measures the heat output of a towel rail. If you're relying on the towel rail to heat your bathroom (rather than just warm towels), the BTU output needs to match your room size:

• Small en-suite (2-3m²): 800-1,200 BTU
• Standard bathroom (4-6m²): 1,500-2,500 BTU
• Large bathroom (7m²+): 3,000+ BTU

If your bathroom has external walls, high ceilings, or large windows, add 10-15% to these figures. Every product page on FNX Bathrooms lists the BTU output in the specifications section.

Towel rail sizes are measured in height × width:

Compact (800×400mm) — Suitable for cloakrooms and small en-suites. Holds 1-2 towels.

Standard (1200×500mm) — The most popular size, fitting most bathrooms comfortably. Holds 2-3 towels with good BTU output.

Large (1600×600mm) — For spacious bathrooms and family use. Holds 3-4 towels and provides significant room heating.

Always measure the available wall space and consider proximity to the shower or bath — you want your towels within easy reach.

Heated towel rails are available in a range of finishes to match your bathroom:

Chrome — The classic, most affordable option. Easy to clean and suits any style.

Brushed brass — Warm and luxurious. Pairs beautifully with brass taps and accessories.

Matt black — Bold and contemporary. A statement piece against light tiles.

Anthracite — A dark grey finish that's understated and modern. Popular in minimalist bathrooms.

Style-wise, ladder-style rails are the most common and practical for hanging towels. Vertical designer radiators offer a more architectural look. Traditional period-style rails suit Victorian and Edwardian bathrooms.

Browse all heated towel rails.

A few practical points to keep in mind:

• Central heating rails need a plumber to connect to your pipework. Pipework usually comes up from the floor or out of the wall.
• Electric rails need a qualified electrician to install a fused spur connection. The spur switch must be outside the bathroom or at ceiling height.
• Dual fuel rails need both a plumber and an electrician.
• Valves are usually sold separately — choose manual or thermostatic valves in a matching finish.
• Allow at least 600mm clearance from the shower or bath to avoid water splashing onto the electrical connections.