Relative humidity and dew point explained

Relative humidity and dew point

Warmer air can hold more moisture

Air has the ability to absorb different amounts of moisture at various temperature values. Warm air expands, so it can hold significantly more moisture than cold air. In the illustration below, containers of various sizes represent the volume of air at different temperature values.

Relative humidity and dew point explained, image 1

Relative humidity vs. the amount of moisture

Relative humidity (RH) is a percentage that shows the extent to which air is saturated. In our example, this is shown by how full a container is. Here, the relative humidity is 50% at each temperature value, so containers are shown half-full. As you can see, relative humidity of 50% at 55°F (13°C) is a much smaller amount of moisture in the air than a relative humidity of 50% at 75°F (24°C). Notice how much more water is contained in the container that represents hot 95°F (35°C) degree air:

Relative humidity and dew point explained, image 2

Dew point depends on temperature and RH

If we start cooling the air, its volume would start decreasing. At some point — known as the dew point — the air would no longer be able to hold all that stored moisture. Condensation starts to occur, droplets of water form, and then separate from the air. In nature, we would observe it as rain.

Temperature, relative humidity, and dew point are all interrelated. Each temperature and relative humidity value has its own dew point. So, a 37°F (2.8°C) dew point is what you get with a temperature of 55°F (13°C) and RH of 50%. While a dew point increases to 74°F (23°C) by the time you have the 95°F (35°C) air temperature and 50% RH.

Relative humidity and dew point explained, image 3

How atmospheric water generators work

The purpose of any atmospheric water generator is to pull moist air inside of the unit, then cool it down sufficiently to reach the dew point. This converts water vapor into droplets that get collected and filtered.

At Tsunami Products, we concentrate most of our Research and Development efforts on creating the most efficient water extraction process. All Tsunami® units utilize Tsunami Core Technology™ — a special patented extraction chamber with a range of features that force water condensation — resulting in greater output.

Inside atmospheric water generator