Dual Fuel Towel Rails
14 years supplying UK bathrooms, est. February 2012. Free delivery on orders over £200. 5-year manufacturer's warranty on all towel rails.
A dual fuel towel rail runs off your central heating in winter and off its own electric element in summer, so towels dry all year without firing the boiler. Choose from 260+ rails in chrome, matt black, white and anthracite, 200mm to 1200mm wide and 400mm to 1800mm high, with a choice of T-piece or corner valve connection to suit your pipework. Every rail is EN442 tested and carries a 5-year warranty.
How a Dual Fuel Towel Rail Works
The rail is plumbed into your central heating like any radiator. A T-piece at the bottom also holds an electric element that sits inside the rail and heats the same water. You use one heat source at a time:
- Heating season: both valves open, element off. The boiler heats the rail along with the rest of the house.
- Rest of the year: close one valve and switch the element on. The rail heats on its own while the rest of the system stays cold.
Close one valve only, never both. Water expands as it heats and the open valve gives it somewhere to go. The closed valve stops the heat drifting back into the pipework. Left or right makes no difference.
T-Piece or Corner Valve? Choosing Your Dual Fuel Connection
Every dual fuel rail needs a valve set with a T-piece built in, which gives the element its entry at the bottom of the rail. We offer two ways to connect it, and you choose when you add the rail to your basket.
| T-piece + angled valve | Corner valve | |
|---|---|---|
| How it connects | A separate T-piece fits the rail's bottom inlet and the angled valve connects to its side entry | Valve and T-piece are one body that connects straight to the rail |
| Pipes | Floor or wall | Wall only |
| Pipe centres | Shifted by about 75mm, narrower or wider depending on the setup (a 150mm pipe centre becomes 75mm or 225mm) | Unchanged: the rail's standard pipe centre |
| Appearance | Adds a valve entry on the side, so it looks bulkier | The neatest and most compact finish |
| Best for | Floor pipes, or pipework you can adjust | Pipes coming out of the wall, where looks matter |
| Finishes | Chrome, white, matt black, anthracite | Chrome, white, matt black, anthracite |
Not sure which? If your pipes come out of the wall, the corner valve is the tidier choice. If they come up through the floor, you need the T-piece and angled valve. Because the T-piece changes the pipe centre, compare it with your existing pipes before ordering, or message us the measurement and we will check it for you.
Dual Fuel, Electric or Central Heating?
| Dual fuel | Electric only | Central heating only | |
|---|---|---|---|
| Heats in summer | Yes, on the element | Yes | Only if the boiler runs |
| Winter running cost | Lowest, uses the boiler | Electricity all year | Lowest |
| Needs pipework | Yes | No | Yes |
| Trades needed | Plumber and electrician | Electrician | Plumber |
| Best for | Bathrooms already on the heating circuit | Ensuites, lofts and extensions with no pipes nearby | Homes that never need summer heat |
If pipes are already at the wall, dual fuel is usually the right call. If they are not, an electric towel rail avoids lifting the floor. More detail in our dual fuel vs electric guide.
Choosing the Right Size
Replacing an existing rail? Measure the pipe centres first: the distance between the centres of the two pipes. On our rails the pipe centre is the width minus 50mm, so a 500mm wide rail has 450mm pipe centres. A corner valve keeps that figure; a T-piece and angled valve shifts it by about 75mm (see above). We stock widths in 50mm steps from 200mm to 1000mm, then 1100mm and 1200mm, so there is usually a rail to match your existing pipes. Use the Pipe Centre filter above.
Heating the room as well as the towels? Work out what the room needs with our BTU calculator, then filter by BTU. Painted finishes (black, white, anthracite) give out more heat than chrome at the same size, so check the BTU figure on each product rather than assuming.
On a heat pump? Low flow temperatures mean a rail runs cooler than it would on a boiler. Go up a size, and the electric element gives you a boost on demand.
Choosing the Element and Controls
You choose the element as well as the valve set when you add the rail to your basket. The element is supplied loose, not pre-fitted, to avoid damage in transit, and always fits at the bottom of the rail.
- Single heat (IPX6): simple on/off at full power, no thermostat. The lowest-cost option, and it works with any of the timers below.
- ER-Touch thermostatic (IPX4): set a target temperature from 45 to 65°C and the element holds it, cycling on and off to save energy. It also has a 1 to 5 hour drying mode. Our pick for most bathrooms.
Add a timer so warm towels are ready when you are and the element cannot be left on all day: a booster timer (1 to 5 hour countdown), a 7-day digital timer, or a WiFi timer you control from your phone. A timer is optional and can be added later.
Wattage: 300W is standard for most of our dual fuel rails, and each product page states the element supplied for that size. Already have a central heating rail? A dual fuel kit converts it.
Installation
You need two trades. A plumber connects the valves to the flow and return (½" BSP rail connections, 15mm pipe): with the T-piece option the T-piece goes into the bottom inlet and the angled valve onto its side, and a corner valve connects straight to the wall pipe. A qualified electrician wires the element to a fused spur, as bathroom electrics fall under Part P. The rail must be full of water and bled before the element is switched on. An element run dry will fail.
Dual Fuel Towel Rail FAQs
What is a dual fuel towel rail?
A heated towel rail with two heat sources: your central heating and a built-in electric element. You use the boiler in winter and the element when the heating is off.
What is the difference between the T-piece and corner valve options?
The T-piece and angled valve option works with floor or wall pipes, but adds a valve entry on the side and shifts the pipe centres by about 75mm. The corner valve has the T-piece built into the valve body, so it is neater and more compact and keeps the rail's standard pipe centres, but it only suits pipes coming out of the wall.
Will the T-piece change my pipe centres?
Yes, by about 75mm. A rail with 150mm pipe centres becomes either 75mm or 225mm, depending on the setup. If your existing pipes are fixed, check the new figure before ordering, or choose the corner valve if your pipes come out of the wall.
Do I close both valves when using the electric element?
No. Close one valve only. The open valve lets the heated water expand into the system. Closing both traps the pressure inside the rail and can damage it.
How much does a dual fuel towel rail cost to run on electric?
Multiply the element's kW by the hours used and your unit rate. At the October to December 2026 price cap of 26.32p per kWh, a 300W element running 4 hours a day costs about 32p a day, or roughly £9.50 a month. A 600W element costs about 63p a day. A thermostatic element uses less because it switches off once the rail is up to temperature.
Can I run central heating and the element at the same time?
It will not cause harm, but it wastes electricity. With both valves open the element's heat is carried away into the pipework. Use one source at a time.
Is a dual fuel towel rail safe in a bathroom?
Yes. Our elements are rated IPX4 or IPX6, which meets the IPX4 minimum for bathroom zones 1 and 2. The fused spur must sit outside those zones. Your electrician will confirm the layout before fitting.
Do I need to bleed a dual fuel towel rail?
Yes. Bleed it after installation and whenever the top bars stay cool, exactly as you would a radiator. Trapped air also leaves the element partly uncovered, which shortens its life.
Can I convert my existing towel rail to dual fuel?
In most cases, yes. You need a T-piece or corner valve, an element short enough for the rail's height, and a fused spur nearby. Our dual fuel kits include the element, T-piece and matching valves. The system has to be drained to fit it.
How long does the electric element take to heat up?
Around 20 to 30 minutes for a typical rail. On electric the upper bars run warmest, which is normal: heat rises from the element at the bottom.
What warranty do you offer?
5 years on the towel rail and 1 year on electrical components. Delivery is free over £200 and £9.99 below that, with next working day dispatch to UK mainland on orders before noon and 30-day returns.
We have supplied dual fuel towel rails from our Coventry warehouse since 2012. For help with sizing, pipe centres or choosing between the T-piece and corner valve, call 02477 220 780 or send us a message.
