Water evaporates once it has absorbed enough heat. This heat absorption is the key principle behind why you feel cooler as your sweat evaporates, and why you feel cold after swimming. It’s also the same principle behind evaporative air coolers. This type of air cooling traces its roots back to ancient Egypt and the early Egyptians who noticed that as air moves over water, it gets much cooler.
Evaporative coolers–or as they’re more commonly known, swamp coolers–allow air to pass through water instead of over it for cooling purposes. This effective method has many advantages, but it’s not without it’s limitations. Let our HVAC experts at Cal Air explain the simple science behind evaporative air coolers.
Humidity is a measure of how much water vapor is in the air. High levels of humidity can make the air feel hot even if the actual temperature is much lower. This is because the more the air around you is saturated with water, the less your sweat evaporates. That’s why you feel hot and sticky on hot, humid days. With this in mind, evaporative coolers work best in hot, dry areas.
Air Conditioners vs. Swamp Coolers
In a standard air conditioning unit, the air is forced through refrigerant-filled coils, which lowers its temperature. Subsequently, the cooled air is blown out into your home with blower fans and distributed by ducts and vents. This method is more or less similar to that of evaporative coolers, the biggest difference being the type of coolants used: AC units use Freon, while swamp coolers use water.
The Benefits of Swamp Coolers
Swamp coolers can be installed at a third or a quarter of the cost of centralized air conditioning systems. They also consume up to 20% less energy. Generally speaking, this type of air conditioning is cheaper than the more common alternatives.
Enjoy high-efficiency evaporative cooling systems only from our HVAC specialists at Cal Air, your leading provider of heating and air conditioning services. Give us a call at (702) 550-1435 or fill out our online contact form to request an estimate today. We guarantee a response in one hour or your diagnostic is free. We serve homeowners in Las Vegas.