Humidity measures what?

Humidity measures what?

• A. The amount of water vapor in the air.
• B. The air's temperature.
• C. The air's velocity.
• D. The air's density.

Answer: (A)

Humidity is the amount of water vapor present in the air. This moisture content is what HVAC work often focuses on, since it affects comfort and latent cooling. There are different ways to describe humidity, such as relative humidity (which compares actual vapor pressure to the maximum possible at the current temperature) and absolute or specific humidity (mass of water vapor per volume or per mass of moist air). Temperature influences how much moisture air can hold, but humidity itself is about moisture content, not temperature, airflow speed, or air density. Temperature, velocity, and density are separate air properties.

Humidity is the amount of water vapor present in the air. This moisture content is what HVAC work often focuses on, since it affects comfort and latent cooling. There are different ways to describe humidity, such as relative humidity (which compares actual vapor pressure to the maximum possible at the current temperature) and absolute or specific humidity (mass of water vapor per volume or per mass of moist air). Temperature influences how much moisture air can hold, but humidity itself is about moisture content, not temperature, airflow speed, or air density. Temperature, velocity, and density are separate air properties.