Straight inline Floor pipes
Choose this when pipework comes straight up out of the floor directly below the rail inlets.
Sale
400 mm High x 400 mm Wide Flat Black Heated Towel Radiator
399
BTU
170W
Watts
400mm
Height
400mm
Width
£52.45
£72.45
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Frequently Bought Together
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★ Excellent service · Elegant Radiators · Coventry, UK
UK stock · Same-day dispatch before 12pm · 5-year warranty
Tall, wide, seriously warm
Product Overview & Heating Capacity
Seven tubes in a 400mm-wide frame at 400mm tall — one of the highest-output black towel rails in this format. 399 BTU at ΔT50 makes it a confident primary heat source for larger bathrooms. No tube count compromises to hit a price point. Matt black powder coat on mild steel, BS EN 442 tested.
399
BTU at ΔT50
170 W
Heat output
7
Tubes (3+4 layout)
5 yr
Warranty, no quibbles
Will This Towel Rail Fit My Bathroom?
Enter your room dimensions below — the calculator will tell you whether this rail is a good fit, tight, or whether you should consider a larger size.
✓ Good fit. Your room needs ~387 BTU. This rail delivers 399 BTU — comfortable headroom.
Choose your fuel type
This listing is the central-heating version. Same design, three ways to power it — make sure you're on the right page for your setup.
Central heating You're here
Connects to your boiler via valves. Heats whenever your central heating is on.
Electric only Independent
Pre-filled and ready to plug in. Run independently of your boiler — ideal for rooms without existing pipework.
Dual fuel Best of both
Central heating in winter, electric in summer. Warm towels year-round without running your boiler.
Technical Specifications & Dimensions
Fit-check before you buy
| Manufacturer ID | FB-40-40 |
| Height | 400mm |
| Width | 400mm |
| Projection from wall | 90–110mm |
| Pipe centres | 350mm |
| Heat output (ΔT30) | 205 BTU · 88W |
| Heat output (ΔT50) | 399 BTU · 170W |
| Heat output (ΔT60) | 506 BTU · 215W |
| Tube layout | 3+4 (7 tubes total) |
| Tube diameter | 22mm |
| Model | Straight / Flat |
| Material | Mild steel |
| Finish | Matt black powder coat |
| Valve connection | ½" BSP |
| Dual-fuel ready | ✓Yes (with element) |
| Electric-only ready | ✓Yes (with element) |
| Standard | BS EN 442 |
| In the box | 4× adjustable black brackets, screws, rawl plugs, washers, blanking & bleed plug |
| Warranty | 5 years |
170W
399 BTU at δT50
δT30 88 W
δT60 215 W
✓
Dual-fuel ready
add element · runs electric too
✓
Pipe centres 250mm
±15mm valve tolerance
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In stockships today
30-dayreturns
Need help measuring? BTU calculator ↗
Choosing Your Valve Type
Three valve types — which one you need depends on where your pipes come out.
Angled Wall pipes
For pipes that exit horizontally from the wall. The valve turns 90° upward into the rail.
Corner Wall pipes
A tighter alternative for wall pipes — sits flush to the wall for a cleaner, lower-profile finish.
TRV valves are not suitable for towel rails — fitting one could leave your towels damp and smelling. Find out why ↗
Not sure which? Browse our valves ↗
Complete the look
Frequently bought together with this rail.
Frequently Asked Questions
Q.
Can this towel rail be used as electric-only or dual-fuel?
A. Yes — with the addition of a heating element, this rail converts to electric-only or dual-fuel running. We pre-fill electric rails with a minimum 85% reverse-osmosis water and inhibitor mixture (ethylene glycol), leaving an air gap for expansion. The element installs at the bottom (left or right) — heat rises, so top-mounted elements won't work properly.
Q.
Will this heat my bathroom on its own?
A. At 399 BTU / 170W this rail is sized for compact spaces — downstairs WCs, cloakrooms, and small en-suites. For a typical 1.2m × 1.0m WC you need roughly 160 BTU, so this rail has comfortable headroom there. For a standard bathroom (2.4m × 2m+), consider a taller or wider rail.
Q.
What are the pipe centre and projection measurements?
A. Pipe centres are 350mm. The brackets are adjustable: total projection from the wall is 90–110mm. That gives you flexibility if your pipes don't align perfectly with the rail inlets. Most angled valves give a further ±15mm of horizontal play, so pipe centres between 335–365mm are within tolerance.
Q.
Is the matt black finish rust-resistant?
A. Yes — the matt black powder coat is applied over high-quality mild steel and resists rust and corrosion in normal bathroom conditions. The rail carries a 5-year warranty.
Q.
Does it come with fixings?
A. Yes — the rail ships with 4× adjustable matt black brackets, screws, rawl plugs and washers, plus a blanking plug and a bleed plug. Valves are sold separately so you can choose straight or angled to match your pipework.
5 Years Guarantee
Manufacturer backed
UK Company
Since 2012 · Coventry
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UK-based in Coventry with 14 years serving homeowners, plumbers & designers.
£52.45
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