Swamp coolers are an effective method for cooling indoor spaces. However, depending on the climate where you live, evaporative cooling might not be the most effective option for you.
Thus, understanding how evaporative air coolers work will help you decide if this is the right cooling solution for you.
Although the name “swamp cooler” sounds like it would cool muggy, swamp-like conditions, these machines would actually be ineffective in warm, humid areas like the southeastern United States because the air is so heavily saturated with moisture.
Evaporative coolers tend to work best when relative humidity is 60% or less; however, evaporative coolers can work in humid conditions when they are used in semi-outdoor (loading bays and docks, garages) and outdoor conditions (sporting events, festivals) for moisture evaporation.
Because of the potential for moisture build-up indoors, an open window or door is required for use and not recommended for indoor use in humid climates. For people living in more humid climates who are searching for a cost-effective alternative to traditional central air conditioning systems, consider portable air conditioners or window air conditioners.