What is the difference between a refrigerent device and an evaporative cooler?
An evaporative cooler has a tank inside that the user fills with water. This soaks a rotating membrane. A fan pulls air through this membrane and as it does so the water evaporates off and it is this action that causes cooling of the air. Evaporative coolers require a constant supply of fresh, low humidity air in order to operate. This means keeping windows and doors open to allow constant fresh air change. They are largely ineffective here in the UK climate where we tend to get high humidity levels. We recommend you avoid evaporative coolers for this reason. Whatever the conditions a refrigerent air conditioner will always produce cooler dryer air.
