These Electric Eco-max Heaters are manufactured in Spain from die cast aluminium. The individual panels are designed as such to allow for maximum convection of warm air. The nature of aluminium allows for rapid heat exchange as the material is a super conductor of heat. These are very efficient, 'cost saving' thermostatic electric radiators. We offer them in two types, programmable and non-programmable. The non programmable version, listed first, is operated by two analog dials. The first dial accurately controls the temperature from a frost setting * to 10. If the frost setting is selected the heater will automatically come on if the temperature drops below 3 degrees Celsius to prevent sub 0 temperature causing damage to the home. The second dial switches between three operational modes, 'off', 'sun' and 'moon'. With the sun mode selected the heater maintains the temperature set with the temperature control dial. Moon mode maintains a temperature 3 degrees lower than the temperature dial in order to save energy. The programmable version has the same features as the non-programmable version but with the added advantage of a 24/7 timer and a digital interface. The digital interface has a built in electronic thermostat which allows the setting of temperatures to an accuracy of 0.5 degrees C. The timer allows for programmes to be set for individual days using both the 'sun' and 'moon' modes mentioned above, it is also possible to allocate different programs to different days of the week. These 'eco' electric heaters are listed below; they are separated into programmable & non-programmable radiators. Free delivery to all mainland UK addresses within 2-4 working days. The radiators are covered by a 2 year guarantee.