Haverland Designer TT RC12TT Electric Radiator - 1500w (B-Grade)


This product is B-grade stock. It may have slight aesthetic imperfections or damaged packaging but is otherwise unused. All B-grade products are tested, re-boxed where possible and contain all documents and fixtures required for installation. The condition of individual units can vary so please call us direct on 0330 880 7001 for more information. We're so confident in the quality of our B-grade stock that we offer the same warranty periods on them as we would a new product.

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

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Only £240.15 inc. VAT
  • Product Details
    • Energy Efficient Heating with Eco Benefits
    • Thermal Fluid Technology
    • Heat Retentive Thermodynamic Gel
    • 100% Recyclable Aluminium Body
    • 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
    • Thermal Limiter for Safety
    • 1083 x 580 x 100 mms (WxHxD)
  • Product Specifications
    More Information
    Brand Haverland
    Product Weight (kg) 22
    Depth (mm) 100
    Height (mm) 580
    Width (mm) 1083
    Wattage (w) 1500
    Cable Length (m) 1.35
    IP Rating IP24
    Suitable for Bathrooms Not Suitable
    IEC Class Protection Class I
    Radiator Elements 12
    Room Size - Modern Insulation (m²) 18
    Room Size - Poor Insulation (m²) 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
    All Haverland Designer TT Electric Radiators come with a 3 Year Manufacturer’s Warranty and a 10 Year Warranty on the radiator body (subject to manufacturer's terms and conditions). Haverland accessories come with a 1 Year Warranty.

Haverland Designer TT RC12TT 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 TT range uses a thermodynamic gel which heats the radiator surface rapidly and uniformly, ensuring even heat distribution throughout your home without hot or cold spots. 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, if needed! The TT is easy to control from the radiator’s 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 version of the Designer TT, updated for 2018, also features adaptive start and open window detection functions, to improve its efficiency and lower running costs. If a window is opened, the TT 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 TT’s temperature is scheduled to change. Rather than starting or stopping the heat at the scheduled time, the TT prepares in advance, learning how long it takes to raise the temperature and tapering its heating so it hits the desired temperature on time.

The 1500W RC12TT is also mess-free, safe and easy to use. The heating element is 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 radiator’s 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 our 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 straight-forward 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.

Available in five sizes: 500W, 750W, 1000W, 1250W & 1500W. For larger rooms you might want to consider a Haverland RC14V – an 1800w electric radiator which looks identical to the TT series and boasts similar features.