The ThermoSphere Single Round 500mm is a single-end-mounted 12V electric heated towel bar with a round-profile tube (32 × 100mm), offering a softer, more traditional aesthetic than the square profile. ThermoSphere's reinforced single-end fixing holds up to 30kg permanently level. At 12V SELV, safe in any bathroom zone. Made from 304 grade stainless steel, designed and finished in the UK. Available in 6 standard finishes. 25W. 5-year warranty. 12V transformer sold separately.
25W
Max Output
12V SELV
Safety
500mm
Bar Length
304 SS
Grade
6
Finishes
5 yr
Warranty
⚠ Transformer Required: A separate 12V transformer is required and sold separately. Total the wattage of all bars on the circuit to size the transformer correctly. Connection to mains must be made by a qualified electrician.
Sizes & Finishes
Code
Description
Finish
Output
HTB-SRS-500-DPS
Single Round 500mm
Diamond Polished
25W
HTB-SRS-500-BSS
Single Round 500mm
Brushed Stainless
25W
HTB-SRS-500-PLB
Single Round 500mm
Diamond Polished Brass
25W
HTB-SRS-500-BRB
Single Round 500mm
Brushed Brass
25W
HTB-SRS-500-MBK
Single Round 500mm
Matt Black
25W
HTB-SRS-500-MWT
Single Round 500mm
Matt White
25W
Key Features
12V SELV — Safe in Any Bathroom Zone
At 12V SELV (Safety Extra Low Voltage) this bar is completely safe in all bathroom zones including Zone 1 (above or inside a bath/shower tray) where 230V appliances are not permitted. No specialist enclosure required.
12V SELVAll bathroom zones
Patented Self-Regulating Element — 50% More Efficient
The dual self-regulating heating element automatically limits maximum operating temperature. When a towel is placed on the bar the element heats to optimum; when temperature is reached output reduces rather than cycling on/off at full power. 50% more energy-efficient than conventional electric towel bars.
Patented elementSelf-regulating50% more efficient
304 Grade Stainless Steel — Designed and Made in the UK
Manufactured from 304 grade stainless steel — the premium grade used in demanding wet environments. Designed, finished and made in Great Britain. Available in 6 standard finishes: Diamond Polished, Brushed Stainless, Diamond Polished Brass, Brushed Brass, Matt Black, Matt White.
304 SSMade in UK6 finishes
Single-End Patented Mounting — Up to 7 Bars, Integrated Cable Management
The patented mounting system supports up to 7 bars in a single run with perfect alignment and concealed cable routing. For single-mounted bars, ThermoSphere's updated fixing method holds up to 30kg permanently level — eliminating the drooping that affects many competitor single-mount bars. The 2m connection cable exits from the wall end of the bar, fully concealed.
Patented mountUp to 7 barsCable managed
T-MO Relay Mode and Dual Control Thermostat Compatible
Pair with the T-MO thermostat in relay mode for scheduled on/off control without temperature sensing. The ThermoSphere Dual Control Thermostat can independently schedule both a towel bar and underfloor heating from one thermostat.
T-MO relay modeDual Control compatible
Technical Specifications
Technical Data
Voltage
12V SELV
Material
304 Grade Stainless Steel
Dimensions (W×H×D)
500 × 32 × 100mm
Output
25W
Cable Length
2m
Wiring Connection
Concealed
Fixing
Patented mounting system (concealed)
Finishes Available
Standard Finishes
Diamond Polished, Brushed Stainless, Diamond Polished Brass, Brushed Brass, Matt Black, Matt White
ℹ Installation: All electrical connections must be made by a qualified electrician in accordance with BS 7671. Register your product with ThermoSphere online to activate your lifetime warranty.
Frequently Asked Questions
Do I need a transformer?
Yes — a 12V transformer is required and sold separately. Add up the wattage of all bars on the circuit to size the transformer. This 500mm bar is 25W.
Can I control this bar with a thermostat?
Yes. Use the T-MO thermostat in relay mode for scheduled on/off control. The Dual Control Thermostat can independently schedule a towel bar and underfloor heating from a single unit.
How many bars on one mounting system?
Up to 7 bars on the patented system in a single run, with perfect alignment and no visible cables between bars.
Is it safe in all bathroom zones?
Yes — 12V SELV is safe in all bathroom zones including Zone 1 (directly above or inside a bath/shower tray) where 230V appliances are not permitted.
What is the maximum load?
Each single-mounted round bar holds up to 30kg. The patented mounting ensures bars remain perfectly level long-term.
Related Products
ThermoSphere Single Square 500mm
Square profile alternative
ThermoSphere Double Square 450mm
Double-end mounted version
ThermoSphere T-MO Thermostat
Control via relay mode
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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