Here at the heat is on, we put the knowledge of what you need directly in your hands as the homeowner, so you needn’t ask or wait for information from your electrician. Here we give you complete expert guidance for this specific electric towel rail — including details of any additional parts required — so you can ensure a smooth and successful installation when your tradesman arrives.
discontinuation update (effective from May 2027) - dexter
- The trapezium shaped profile used to make the DEXTER model is being discontinued by Terma - this will come into effect from approx. May 2027. As at May 2026 there are enough profiles left at the plant for another 12 months of production. So please bear this in mind and as time progresses - if placing a large order you may wish to check stock levels prior to placing your order.
note: dexter is shown inverted in these images
- The images created for this particular model were shot with the rail upside down in error and the higher concentration of bars will be at the bottom and not the top.
heat output
- Firstly, if you haven't already done so - use our heat calculator to work out your specific requirements for your room to ensure you are looking at the right size electric radiator - in terms of the Watts / Kilowatts heat output it gives.
design & material
- DEXTER E features unique trapezium-shaped uprights with wide, flat curved bars.
- A distinctive, sculptural alternative to standard ladder towel rails.
- A popular choice due to its solid construction and contemporary design.
- Flat bars enhance the visibility of the finish compared to round bar models.
- Ideal for family bathrooms or utility rooms, with wide bar spacing for towels and clothes.
- Low profile with a projection of just 60mm from the wall.
- Made from low carbon mild steel.
- Additionally, we have created a thorough and detailed technical guide on electric radiators, giving even more information and tips.
full range of sizes available
- In addition to the sizes we are displaying here on the heat is on - you can view the full range of 9 different sizes of DEXTER E here on the Terma website.
- We can process a special order for any size you wish to purchase if that size is not shown on our website.
control & functionality
- Uses the Terma KTX 2 heating element.
- The KTX 2 has 5 temperature settings that range from 30°C to 60°C.
- 2 hour drying function for convenient timed heating.
- Accurate internal temperature regulation for consistent heating performance.
colour & finish
- Painted in RAL 9005 (Matt) Black.
- Finished in a matt, smooth texture.
- This is a standard powder paint.
- Additionally, we have created a thorough and detailed technical guide on paint finishes and colours giving even more information and tips.
installation & features
- Element is pre fitted inside the radiator - located on the right hand side (E8 connection). If you would like the heating element on the left hand side (E1 connection), please contact us to place this as a special order. Consider where your electric supply will be so the wire has the shortest distance to travel.
- The KTX 2 Square controller is supplied separately in the packaging – simple push-fit installation with adjustable viewing angle.
- Quick and easy installation – no commissioning or complex setup required.
safety & compliance
- IPX4 rated – safe for use in bathrooms.
- Oil-filled for efficient, consistent heat distribution.
- Class 1 electrical appliance.
- UKCA approved.
guarantee, warranty and replacing the heating element
- 2-year manufacturer’s warranty (heating element).
- Usual lifespan of a heating element is 4 to 7 years dependent on use.
- At end of life, you can simply replace the TS1 heating probe inside this model, as the external KTX controller is a separate unit — making replacement a cost-effective and straightforward process.
- 12-year manufacturer’s warranty (radiator).
