What is the humidity ratio at 80 F and 60% relative humidity?

To determine the humidity ratio at 80 degrees Fahrenheit with a relative humidity of 60%, it is essential to understand the relationship between temperature, humidity, and the concept of Grains Per Pound (GPP). The humidity ratio represents the mass of water vapor in the air relative to the mass of dry air.

At a given temperature, there is a maximum amount of moisture that air can hold, known as the saturation vapor pressure. At 80°F, the saturation vapor pressure is approximately 0.60 inches of mercury. When the air is at 60% relative humidity, it means that it holds 60% of the maximum moisture possible at that temperature.

To convert this to GPP, various formulas and conversion tables provide the relevant findings. At 80°F and 60% relative humidity, the calculations yield a humidity ratio of around 91 GPP, reflecting the amount of water vapor in the air. This measure is crucial in the context of water restoration, as it helps professionals assess moisture levels, which can inform decisions related to drying processes, developing drying goals, and evaluating the effectiveness of dehumidification efforts.

Thus, the correct answer, representing the humidity ratio at the specified temperature and relative humidity, is indeed 91 GPP