The wet bulb and dry bulb temperatures become identical when the relative humidity reaches 100%.
At this point, the air is fully saturated with moisture, meaning it can no longer absorb additional
water vapor. As a result, the rate of evaporation decreases, and there is no difference between the
dry bulb and wet bulb temperatures.
Detailed Explanation:
The dry bulb temperature measures the air temperature, while the wet bulb temperature takes into
account the cooling effect of evaporation. When relative humidity is at 100%, the air has reached its
saturation point, and no further evaporation occurs. This causes both the wet bulb and dry bulb
thermometers to display the same temperature reading. This condition is critical in understanding
environmental conditions, particularly in HVAC and data center environments, where humidity
control is essential to avoid equipment overheating or corrosion.
EPI Data Center Specialist Reference:
The EPI Data Center Specialist training includes understanding humidity levels and their impact on
data center environments. Knowing when wet bulb and dry bulb temperatures align helps data
center operators manage moisture levels effectively, which is essential for preventing issues related
to high humidity, such as condensation on IT equipment.
