Haverland Designer TT Electric Radiators


Haverland Designer TT electric radiators use the latest thermal fluid technology, providing energy-efficient heating for a range of spaces. Featuring open window detection, adaptive start, and an in-built energy monitor, the Designer TT range is an eco-conscious heating system for modern households.

Please note: this heater is not suitable for bathroom installation.

We are currently transitioning our Designer TT range to a model with a slightly different control panel - more advanced and intuitive, but featuring the same core features.

Grouped product items
Options & Sizes Qty
Model: RC4TT Wattage: 500w Heats up to: 6.5m2 Dimensions: 484mm x 572mm x 100mm
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RRP £414
Only £248.40 inc. VAT
Model: RC6TT Wattage: 750w Heats up to: 9m2 Dimensions: 617mm x 572mm x 100mm
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RRP £478.8
Only £286.80 inc. VAT
Model: RC8TT Wattage: 1000w Heats up to: 12m2 Dimensions: 750mm x 572mm x 100mm
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RRP £556.8
Only £333.60 inc. VAT
Model: RC10TT Wattage: 1250w Heats up to: 15m2 Dimensions: 903mm x 572mm x 100mm
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RRP £636
Only £381.60 inc. VAT
Model: RC12TT Wattage: 1500w Heats up to: 18m2 Dimensions: 1036mm x 572mm x 100mm
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RRP £712.8
Only £427.20 inc. VAT
Not sure which size? in 3 simple steps
  • Product Details
    • Energy Efficient Heating with Eco Benefits
    • Thermal Fluid Technology
    • Heat Retentive Thermodynamic Gel
    • Thermal Limiter for Safety
    • 10 Year Guarantee on Body
    • Easy DIY Plug-In Installation
    • Smart Heating for Your Home & Office
    • Thermostat Accurate to 0.2°C
    • 24/7 Digital Programming
    • Open Window Detection
    • Adaptive Start for Fast Heat-Up
    • Built-In Energy Monitor
  • Product Specifications
    More Information
    Brand Haverland
    Product Weight (kg) 8.5 - 22
    Depth (mm) 100
    Height (mm) 572
    Width (mm) 484 - 1036
    Wattage (w) 500 - 1500
    Cable Length (m) 1.35
    IP Rating IP24
    Suitable for Bathrooms Not Suitable
    IEC Class Protection Class I
    Radiator Elements N/A
    Room Size - Modern Insulation (m²) 6.5 - 18
    Room Size - Poor Insulation (m²) 5 - 15
  • Manuals & Installation

    Download the Designer TT Manual here.

    Download the Designer TT Programming Guide here.

    Download the Designer TT Quick Guide here.

    The TT was updated in 2018 to conform to new EU energy efficiency regulations. If you have an older version of the TT, purchased before 2018, you can download the original Manual and Programming Guide here.

    If you have a TT purchased between 2019-2021, you can download the Manual and Programming Guide here.

    Haverland TT Electric Radiators are easy to install with very basic DIY knowledge . They simply screw to the wall and plug into a normal 13amp socket. Each radiator is supplied with wall plugs, screws, and a template to show you where to put the screws. All you need to do is drill four holes, mount the radiator on the bracket supplied, and plug into the nearest socket. It really is that simple.

    We do not recommend electric radiators or panel heaters for bathroom installation. This is because there is the temptation to hang towels over the appliance to dry, which can obstruct ventilation on the heater and cause a hazard.

    Care must always be taken when connecting multiple radiators or heaters to avoid overloading the ring main of your property. If you are unsure, contact a qualified electrician for advice. For a professional installation, cables can be shortened and the heater connected to the mains supply by a fused spur. This work must be carried out by a qualified electrician.

  • Warranty
    Haverland Designer TT Electric Radiators come with a 3 Year Manufacturer’s Warranty on the electrical components and a 10 Year Warranty on the radiator body.
  • Delivery Info

    Order before 1:30pm
    for FREE Next Day UK Delivery

    This item is available with free next working day delivery. You can choose your delivery date from our calendar at the checkout. Next working day delivery dates are available when you order before 1:30pm (excluding weekends).

    Orders of multiple items may be shipped on a pallet. If you are ordering multiple different items, we will always endeavour to dispatch your goods together. However, separate dispatches may be necessary if the items you have ordered are being shipped from different locations. Check our delivery page or speak to our customer service team for more information.

    Please be aware that delivery times and charges may be increased if you want the items delivered to addresses in the Scottish Highlands & Islands, or outside the UK mainland. This will be calculated when you enter your postcode at the checkout.

Designer TT electric radiators are easy-install, fully programmable electric heaters with state of the art energy management features designed to keep your heating bills as low as possible.

Advanced Control

The Designer TT range optimises energy efficiency with the latest thermal fluid technology, a high precision electronic thermostat, a built in energy monitor, and fully programmable heating control.  The excellent heat retention properties of thermodynamic gel prevent the radiator working hard to maintain temperatures, saving energy and reducing your heating bills. The precision thermostat is accurate to 0.2 °C, so the radiator will switch on or off automatically to maintain a comfortable temperature. With good insulation, this means the radiators only use power for a fraction of the time – creating massive energy saving potential.

Fully programmable controls allow you to set a 7-day heating schedule to suit your lifestyle, with different settings for every hour of every day of the week. TT electric radiators are easy to control from the lockable, appliance-mounted control panel. You can take your pick from 4 pre-set heating programmes and 1 customisable heating programme, and you can even control different rooms or areas of your house separately – keeping busy areas comfortable and preventing heat wastage in empty rooms. The in-built energy monitor allows you to review and fine-tune your heating programmes, helping you minimise wasted energy and keep your heating bills as low as possible.

Sophisticated Features

This new Designer TT range, updated for 2018, also features adaptive start and open window detection functions to improve efficiency and lower running costs. If a window is opened, these electric radiators will sense the sudden drop in temperature and temporarily switch off until temperatures stabilise. This ensures you don’t waste energy if a window is left open accidentally. Meanwhile, the adaptive start function kicks in whenever the TTs’ temperature is scheduled to change. Rather than starting or stopping the heat at the scheduled time, the TT range prepares in advance, learning how long it takes to raise the temperature and tapering its heating so it hits the desired temperature on time.

Designer TTs are also mess-free, safe, and easy to use. The heating element is even fully enclosed so there's no danger of wall blackening. The control panel can be set to your choice of three languages (English, French and Spanish). Additionally, the radiators’ built-in memory can store your programming for up to 24 hours without a power connection – so you won’t need to worry about re-programming your radiators if there’s a power cut.

The elegant contemporary design of these radiators make them discreet yet stylish additions to any home. They're eco-friendly too: the 100% recyclable radiator body is made from high-grade recycled aluminium.


Installation is simple and fast, a straightforward DIY task. Simply screw to the wall and plug in at the nearest socket. Full installation and programming instructions are included. See installation for more details.