When designing a heating system, it’s one thing to give attention to the heat output of your system; but this is just part of the concept of ‘thermal comfort’, which takes into account elements such as air temperature, movement and humidity. While measurement of heat output can be objective, thermal comfort is partly a subjective judgement.
Elements to take into account when aiming for thermal comfort include the use the room is being put to, and the overall temperature, humidity, air movement, and radiant temperature of the room. Even the clothing worn by the user can be taken into account.
In the 1950s, two German researchers, Leusden and Freymark, developed a standard for comfortable warmth, suggesting 18-22º C for normal, healthy adults who are appropriately dressed. Those with respiratory problems or allergies are recommended no less than 16 ºC, and for the sick, disabled, very old or very young, a minimum of 20º C. With a temperature set around 21ºC in winter, you can maintain the optimum level of thermal comfort, without increasing your energy expenditure.
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Economy
Decreasing the temperature in your home by just 1º C can reduce your heating bill by up to £85 per year – most of us won’t even notice such a small difference, so you should give it a try to ease the financial worry of heating your home. You should also keep the airspeed of your heating system below 0.1 m/s and the relative humidity of the space between 40-70%.
Falling outside of these parameters can have a negative impact on productivity and health, such as sleep quality. Studies have shown that bedrooms with high temperatures lower your quality of sleep.
Electric radiators are sometimes said to offer the best cost/conductivity ratio on the market, with the combination of materials and design allowing the steady increase of air temperature when circulating through the radiator’s internal fins. The thermal fluid inside the radiator ensures that the temperature remains stable, while thermal resistance located at the bottom of the radiator offers efficient and uniform heating.
Natural humidity and temperature stability are provided by the gentle rise of the air as it passes through an electric radiator, creating a gentle natural convection cycle, while energy-saving functions can maintain a stable temperature with the use of nominal power once a steady working rate has been achieved.
