![]() ![]() ![]() If the wet bulb temperature is significantly colder than the dry bulb temperature, it means the humidity is low and you have good evaporation going on - great conditions for using an evaporative cooler. As water evaporates from that fabric into the air, it cools the temperature around the thermometer down a bit, and you get a reading that takes into account how humidity affects cooling. To factor in humidity, engineers sometimes take a “ wet bulb temperature,” which involves wrapping a thermometer in wet fabric. Knowing the air temperature alone won’t help you know if your evaporative cooler will work efficiently, though, because such a measurement doesn’t take into account the humidity - a crucial factor when it comes to quick evaporation, as explained above. To be more specific, air temperature here refers to what scientists and engineers call “ dry bulb temperature,” which means temperature measured by a thermometer without any other factors taken into account. To answer it, you’ll need to understand some specifics about the atmosphere in your area, plus a general knowledge of some key weather terms.Īir temperature is probably exactly what you think it is: how hot or cold the air feels based on a standard thermometer reading. Knowing that an evaporative cooler works similarly to the way your body naturally cools itself with sweat, you may find yourself wondering: Should I buy an evaporative cooler where I live? ![]() For people in dry climates, the more humid air that comes out of an evaporative cooler can be a bonus for comfort as well, as skin and nasal passages generally do better with some degree of humidity for good health. ( See What Are Evaporative Coolers? Here’s Everything You Need to Know) This process results in cool air that is then blown out of the unit to make your home more comfortable. A fan brings a supply of air directly across the pad, where contact with warm air stimulates water molecules to evaporate and turn to gas. The pad has many layers to increase its surface area so that water can evaporate more quickly. An evaporative cooler has a specially designed pad that absorbs water from a reservoir. The machine works by speeding up the evaporation process with a simple fan to draw in hot, dry air and spit out more humid, cold air. Think of an evaporative cooler as a machine that helps your home “sweat” to cool off. ![]()
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