If the indoor temperature is 74°F DB and 62°F WB, what does this suggest about moisture in the air?

The combination of indoor temperature being 74°F dry bulb (DB) and 62°F wet bulb (WB) indicates low moisture content in the air. The wet bulb temperature represents the lowest temperature that can be reached by evaporative cooling, which is directly tied to the humidity level in the air. A smaller difference between the dry bulb and wet bulb temperatures generally signifies higher moisture content, as more moisture in the air allows for greater evaporative cooling effect.

In this scenario, the difference is calculated by subtracting the wet bulb temperature from the dry bulb temperature (74°F - 62°F = 12°F). A difference of 12°F suggests relatively low humidity, as a higher difference would suggest drier air and low moisture levels. Thus, this temperature reading is indicative of a comfortable indoor environment with optimal low moisture content, leading to the conclusion that the air is relatively dry.