Khalil Elahee: The number of AC units has more than doubled

Energy efficiency expert Dr Khalil Elahee provides a vivid explanation on the energy efficiency of air coolers, fans and air conditioners. “The number of AC units has more than doubled over the past three years. This has added to the peak demand that occurs on a maximum on weekdays in hot humid summer, either around 2 pm or 7 pm. It is required of all not to use electricity unnecessarily at those times,” he says. He further explains that “AC units (as well as other appliances like fridges) have an Energy Efficiency Label. This is already enforced now by the Energy Efficiency Management Office on a voluntary scheme with the collaboration of all dealers. In 2016, it will be compulsory to show the labels, starting with fridges as from Jan 2016. A class A uses much less – up to 30% less – electricity than a class D appliance. Customers should consider the lifetime cost, not just the initial market value. Ask the salespersons for details on consumption.” Khalil Elahee asserts that for Mauritian households, fans or even air-coolers are sufficient, together with natural ventilation. “AC is not a necessity in most cases and can prove also to be a health hazard besides being a burden on the budget. Best is to think about natural ventilation in the design or redesign of houses. Also favour greening around and on top of buildings as well as reflective paints with cooler colours. In any case, people should learn to use AC properly and maintain it well. If kept so, every 1ºC avoided in setting the temperature, will save at least 10% on the bill. Also note that already all ACs below class D are levied 20% extra. For fans, still use of timers and silent “tower” models use less energy. Think about also the positioning of the fan for both ventilation and health reasons,” he highlights.