How to choose an air cooler

An air cooler is selected to suit the heat load of the cold room, the temperature mode and the type of goods stored. Getting the selection wrong leads either to insufficient cooling or to wasted energy.

The key parameters are cooling capacity at the specified temperature difference, fin spacing (the lower the temperature, the wider the spacing should be to avoid ice build-up) and the defrost method — air, electric or hot gas.

For medium-temperature (MT) cold rooms, a fin spacing of 4–5 mm with electric defrost is usually enough; for low-temperature (LT) rooms, opt for wider spacing and hot-gas defrost.