**6.2 Air coolers and acclimatization**

A major portion, or most of the energy consumed by households and offices is spent on air coolers. In view of this, there have been public service messages informing consumers of the great savings in reducing air-cooler thermostat temperatures by a few degrees. However, there have been very few messages, asking people to replace air-cooling with overhead fans and plain ventilation when possible. It should be recognized that air-coolers normally operate in closed rooms, and air-coolers must work extra to bring down closed-room temperatures to the outside ambient temperatures.

Owing to their great power consumption, air-coolers are unsustainable over the next few decades. It should be noted that humans are very capable of acclimatization, and can quickly adjust to high ambient temperatures when needed. Residents of colder Europena countries can quickly acclimatize to the higher temperature of the tropics, such as in Asia and Africa.

The notion that computer-related equipment last longer in cooler temperatures is now being changed. In a related research conducted in 1994 in Japan, it was seen that computers fared well in higher ambient temperatures of 28 C, as compared to the previous 23-24 C. Mobile phone Base Transceiver Stations (BTS) in Bangladesh are being installed without any aircoolers, as compelled by energy shortages in the country.
